CN113486507B

CN113486507B - Method and device for determining earthquake time schedule, electronic equipment and storage medium

Info

Publication number: CN113486507B
Application number: CN202110719980.0A
Authority: CN
Inventors: 谢志南; 马完君; 章旭斌; 马新生
Original assignee: Institute of Engineering Mechanics China Earthquake Administration
Current assignee: Institute of Engineering Mechanics China Earthquake Administration
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-09-13
Anticipated expiration: 2041-06-28
Also published as: CN113486507A

Abstract

The application provides a method and a device for determining a seismic time-course diagram, electronic equipment and a storage medium, and relates to the field of seismic simulation. The seismic motion time-course graph determining method can generate a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between a target frequency interval and a dual-corner frequency seismic source spectrum between the target frequency interval according to the target frequency interval, a simulated seismic moment, a geological surface source type, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum. The dual-corner frequency seismic source spectrum can more accurately reflect the corresponding relation between the seismic frequency components and the seismic amplitude of the kick type earthquake, so that the corresponding relation between the seismic frequency components and the seismic amplitude reflected in the target frequency interval by the single-corner frequency seismic source spectrum with the minimum seismic amplitude variance of the dual-corner frequency seismic source spectrum in the target frequency interval is more accurate. Therefore, the stress drop determined according to the single-corner frequency seismic source spectrum and a more accurate seismic motion time-course graph can be simulated and obtained on the basis of the stress drop.

Description

Method and device for determining earthquake time schedule, electronic equipment and storage medium

Technical Field

The application relates to the field of seismic simulation, in particular to a method and a device for determining a seismic time-course diagram, an electronic device and a storage medium.

Background

The occurrence of earthquake often causes great damage to geological structures, and even causes geological collapse in severe cases, thereby causing the collapse of buildings. Therefore, earthquake risk assessment is performed in the engineering construction field such as nuclear power plants and the like by performing earthquake-resistant analysis on high-rise building structures in order to ensure the safety of buildings. Generally, seismic parameter data (such as seismic magnitude, medium wave velocity and the like) can be input into a seismic simulation model to output a seismic simulation result (such as seismic time-course diagram data) so as to perform seismic analysis on a high-rise building structure and perform seismic risk assessment on a nuclear power plant.

At present, a single corner frequency seismic source spectrum, a path spectrum and a field spectrum can be input into a random finite fault model to simulate the thrust type strong earthquake. For the source spectrum of the thrust-type strong earthquake, the single-corner frequency source spectrum cannot accurately reflect the corresponding relation between the earthquake motion frequency component and the earthquake amplitude in each frequency interval. The method is mainly characterized in that in a first frequency interval, the seismic amplitude reflected by the single-corner frequency seismic source spectrum is higher than the actual seismic amplitude; in the second frequency interval, the corresponding relation between the seismic frequency component reflected by the single-corner frequency seismic source spectrum and the seismic amplitude is not accurate enough. And the stress drop is generated according to the target seismic moment of the single-corner frequency seismic source spectrum and the single-corner frequency. Therefore, in the case where the single-corner frequency seismic source spectrum cannot accurately reflect the corresponding relationship between the seismic frequency and the seismic amplitude in each frequency interval, the stress drop generated according to the single-corner frequency seismic source spectrum target seismic moment and the single-corner frequency is not accurate enough. Furthermore, the seismic motion time history obtained based on the stress drop simulation is not accurate enough. Therefore, if earthquake-resistant analysis and nuclear power station earthquake risk assessment are performed on the high-rise building structure according to the earthquake motion time-course diagram, the reliability of the analysis result or the assessment result is relatively poor.

Disclosure of Invention

The embodiment of the application aims to provide a method and a device for determining a seismic motion time-course diagram and electronic equipment, which are used for solving the technical problem of inaccurate determination of the seismic motion time-course diagram.

In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:

in a first aspect, an embodiment of the present application provides a method for determining a geo-seismic time-course diagram, including:

acquiring a target frequency interval of a simulated seismic source, a simulated seismic moment, a geological surface source type of a region to be simulated where the simulated seismic source is located, a medium wave velocity, a medium density, fault structure information and geological structure information;

generating a dual-corner frequency seismic source spectrum according to the simulated seismic moment and a pre-configured dual-corner frequency seismic source spectrum generation model;

generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance of the double-corner frequency seismic source spectrum in the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises the target corner frequency and the target seismic moment;

determining the stress drop of the region to be simulated in a target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity;

and generating a seismic motion time-course diagram in a target frequency interval according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity and the stress drop.

In the method for determining the seismic motion time-course diagram, the dual-corner frequency seismic source spectrum can more accurately reflect the corresponding relation between the seismic motion frequency components and the seismic amplitude, so that the corresponding relation between the seismic motion frequency components and the seismic amplitude reflected in the target frequency interval by the single-corner frequency seismic source spectrum with the minimum seismic amplitude variance of the dual-corner frequency seismic source spectrum in the target frequency interval is more accurate. And then, the stress drop is more accurately determined according to the medium wave velocity, the target corner frequency of the single-corner frequency seismic source spectrum and the target seismic moment. Further, the seismic motion time-course map of the target frequency interval, which can be generated from the stress drop, the density of the medium, the fault structure information, the geological structure information, and the medium wave velocity, is more accurate. Therefore, when the earthquake is analyzed on the basis of the earthquake motion time-course diagram of the target frequency interval, the analysis result is more reliable.

Optionally, the stress drop includes a first stress drop, the target corner frequency includes a first target corner frequency, the target seismic moment is a first target seismic moment, and the seismic motion time-course graph of the target frequency interval is a first seismic motion time-course graph;

according to a target frequency interval, a simulated seismic moment, a geological surface source type, a preset single-corner frequency seismic source spectrum generation model and a double-corner frequency seismic source spectrum, a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between a target frequency interval and a double-corner frequency seismic source spectrum in the target frequency interval is generated, and the method comprises the following steps:

when the target frequency interval is a frequency interval with seismic frequency components lower than a preset threshold and the geological surface source type is a background fault surface source, generating a model and a dual-corner frequency seismic source spectrum according to the simulated seismic moment and a preset single-corner frequency seismic source spectrum, and generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval, wherein the single-corner frequency seismic source spectrum comprises a first target corner frequency and a first target seismic moment;

determining the stress drop of the region to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity, wherein the method comprises the following steps:

determining a first stress drop according to the first target corner frequency, the first target seismic moment and the medium wave velocity;

generating a seismic motion time-course diagram in a target frequency interval according to the density, the fault structure information, the geological structure information, the medium wave velocity and the stress drop of a medium, wherein the seismic motion time-course diagram comprises the following steps:

and generating a first seismic motion time-course graph according to the density of the medium, fault structure information, geological structure information, medium wave speed and first stress drop.

It can be understood that, when the specified target frequency interval is a frequency interval in which the seismic frequency component is lower than the preset threshold and the geological area source type is the background fault area source, the dual-corner frequency seismic source spectrum can more accurately reflect the corresponding relationship between the seismic frequency component and the seismic amplitude in the frequency interval in which the seismic frequency component is lower than the preset threshold, so that the corresponding relationship between the seismic frequency component and the seismic amplitude reflected in the target frequency interval by the single-corner frequency seismic source spectrum with the minimum seismic amplitude variance of the dual-corner frequency seismic source spectrum in the target frequency interval is more accurate. And then, according to the wave velocity of the medium, the first stress drop determined by the first target corner frequency and the first target seismic moment of the single-corner frequency seismic source spectrum is more accurate. Furthermore, the first seismic motion time-course graph which can be generated according to the first stress drop, the density of the medium, the fault structure information, the geological structure information and the medium wave speed is more accurate. Thus, when the earthquake is analyzed on the basis of the first earthquake motion time-course diagram, the analysis result is more reliable.

Optionally, the stress drop includes a second stress drop, the target corner frequency includes a second target corner frequency, the target seismic moment is a second target seismic moment, and the seismic motion time travel diagram of the target frequency interval is a second seismic vibration time travel diagram;

when the target frequency interval is a frequency interval with seismic frequency components higher than a preset threshold value and the geological surface source type is a strong slip zone layer surface source, generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the seismic amplitude of the double-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment;

determining a second stress drop according to the second target corner frequency, the second target seismic moment and the medium wave velocity;

and generating a second geo-vibration time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave speed and the second stress drop.

When the designated target frequency interval is a frequency interval with the seismic frequency components higher than the preset threshold value and the geological surface source type is a strong slip zone surface source, the dual-corner frequency seismic source spectrum can more accurately reflect the corresponding relation between the seismic frequency components and the seismic amplitude in the frequency interval with the seismic frequency components higher than the preset threshold value, so that the corresponding relation between the seismic frequency components and the seismic amplitude reflected by the single-corner frequency seismic source spectrum with the minimum seismic amplitude variance of the dual-corner frequency seismic source spectrum in the target frequency interval is more accurate in the target frequency interval. And then, according to the medium wave velocity, the second stress drop determined by the second target corner frequency of the single corner frequency seismic source spectrum and the second target seismic moment is more accurate. Furthermore, the second earthquake time-course graph which can be generated according to the second stress drop, the density of the medium, the fault structure information, the geological structure information and the wave speed of the medium is more accurate. Therefore, when the earthquake is analyzed on the basis of the second earthquake time-course diagram, the analysis result is more reliable.

Optionally, the stress drop includes a first stress drop and a second stress drop, the target frequency interval is a third frequency interval, the seismic motion time-course diagram of the target frequency interval is a third seismic motion time-course diagram, the third seismic motion time-course diagram includes a first seismic motion time-course diagram and a second seismic motion time-course diagram, the third frequency includes an interval first frequency interval and a second frequency interval, wherein the first frequency interval is a frequency interval in which seismic motion frequency components are lower than a preset threshold, the second frequency interval is a frequency interval in which seismic motion frequency components are higher than the preset threshold, the target seismic moment includes a first target seismic moment and a second target seismic moment, and the geological area source type includes a background fault area source and a strong slip area layer source;

when the earthquake motion frequency component belongs to a first frequency interval and the geological surface source type is a background fault surface source, generating a first single-corner frequency earthquake source spectrum with the minimum earthquake amplitude variance between the earthquake amplitude of the first frequency interval and the earthquake amplitude variance between the double-corner frequency earthquake source spectrum and the first frequency interval according to the simulated earthquake moment and a preset single-corner frequency earthquake source spectrum generation model and the double-corner frequency earthquake source spectrum, wherein the first single-corner frequency earthquake source spectrum comprises a first target corner frequency and a first target earthquake moment;

when the seismic frequency component belongs to a second frequency interval and the geological surface source type is a strong slip zone layer source, generating a second single-corner frequency seismic source spectrum with the smallest amplitude variance between the amplitude of the second frequency interval and the amplitude of the double-corner frequency seismic source spectrum in the second frequency interval according to the simulated seismic moment and a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the second single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment;

wherein the first target seismic moment is greater than the second target seismic moment, and the first target corner frequency is less than the second target corner frequency;

determining the stress drop of the region to be simulated in a target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity, wherein the method comprises the following steps:

according to the density, fault structure information, geological structure information, medium wave velocity and stress drop of a medium, generating a seismic motion time-course diagram in a target frequency interval, wherein the seismic motion time-course diagram comprises the following steps:

and generating a third seismic motion time-course graph according to the density of the medium, fault structure information, geological structure information, medium wave velocity, first stress reduction and second stress reduction, wherein the third seismic motion time-course graph comprises a first seismic motion time-course graph and a second seismic motion time-course graph.

The dual-corner frequency seismic source spectrum positioned in the first frequency interval can more accurately reflect the corresponding relation between the seismic frequency components and the seismic amplitude of the seismic frequency components in the first frequency interval; therefore, the corresponding relation between the seismic amplitude and the seismic motion frequency component reflected in the first frequency interval by the first single-corner frequency seismic source spectrum with the minimum amplitude variance in the first frequency interval with the dual-corner frequency seismic source spectrum in the first frequency interval is more accurate. The dual-corner frequency seismic source spectrum positioned in the second frequency interval can more accurately reflect the corresponding relation between the seismic frequency component and the seismic amplitude of the seismic frequency component in the second frequency interval; therefore, the corresponding relation between the seismic oscillation frequency component and the seismic amplitude reflected by the dual-corner frequency seismic source spectrum positioned in the second frequency interval, wherein the seismic amplitude variance of the dual-corner frequency seismic source spectrum positioned in the second frequency interval is minimum, is more accurate. Based on the method, the first stress drop determined is more accurate according to the medium wave velocity, the first target corner frequency of the first single corner frequency seismic source spectrum and the first target seismic moment; and the second stress drop determined according to the medium wave velocity, the second target corner frequency of the second single corner frequency seismic source spectrum and the second target seismic moment is more accurate. Furthermore, the first earthquake motion time-history map and the second earthquake motion time-history map which can be generated according to the first stress drop, the second stress drop, the density of the medium, the fault structure information, the geological structure information and the medium wave velocity are more accurate. Therefore, when the earthquake is analyzed on the basis of the first earthquake motion time-course diagram and the second earthquake motion time-course diagram, the analysis result is more reliable.

In a second aspect, an embodiment of the present application provides an earth-quake time-course determining apparatus, including:

the information acquisition module is used for acquiring a target frequency interval of a simulated seismic source, a simulated seismic moment, a geological surface source type of a region to be simulated where the simulated seismic source is located, a medium wave velocity, a medium density, fault structure information and geological structure information;

the seismic source spectrum generation module is used for generating a dual-corner frequency seismic source spectrum according to the simulated seismic moment and the pre-configured dual-corner frequency seismic source spectrum generation model;

the seismic source spectrum generation module is also used for generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance between the dual-corner frequency seismic source spectrum and the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, the preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises the target corner frequency and the target seismic moment;

the stress drop determining module is used for determining the stress drop of the area to be simulated in the target frequency interval according to the target corner frequency, the target earthquake moment and the medium wave velocity;

and the seismic motion time-history map generation module is used for generating a seismic motion time-history map in a target frequency interval according to the density of the medium, fault structure information, geological structure information, medium wave speed and stress drop.

Optionally, the seismic source spectrum generating module is specifically configured to generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance between the dual-corner frequency seismic source spectrum and the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generating model and the dual-corner frequency seismic source spectrum when the target frequency interval is a frequency interval in which seismic frequency components are lower than a preset threshold and the geological area source type is a background fault area source, where the single-corner frequency seismic source spectrum includes a first target corner frequency and a first target seismic moment;

the stress drop determining module is specifically used for determining a first stress drop according to the first target corner frequency, the first target seismic moment and the medium wave velocity;

and the seismic motion time-course graph generation module is specifically used for generating a first seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave speed and the first stress reduction.

Optionally, the seismic source spectrum generation module is specifically configured to, when the target frequency interval is a frequency interval in which seismic frequency components are higher than a preset threshold and the geological area source type is a strong slip zone area source, generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the target frequency interval and the target frequency interval of the dual-corner frequency seismic source spectrum according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, where the single-corner frequency seismic source spectrum includes a second target corner frequency and a second target seismic moment;

the stress drop determining module is specifically used for determining a second stress drop according to a second target corner frequency, a second target seismic moment and a medium wave velocity;

and the earthquake motion time-course graph generation module is specifically used for generating a second earthquake motion time-course graph according to the density of the medium, fault structure information, geological structure information, medium wave velocity and second stress drop.

Optionally, the seismic source spectrum generation module is specifically configured to, when the target frequency interval is a frequency interval in which seismic frequency components are lower than a preset threshold and the geological surface source type is a background fault surface source, generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between a seismic amplitude in the target frequency interval and a seismic amplitude variance between the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model, and the dual-corner frequency seismic source spectrum, where the single-corner frequency seismic source spectrum includes a first target corner frequency and a first target seismic moment;

the seismic source spectrum generation module is further used for generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance between the double-corner frequency seismic source spectrum and the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum when the target frequency interval is a frequency interval with seismic frequency components higher than a preset threshold and the geological surface source type is a strong slip zone surface source, wherein the single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment;

the stress drop determining module is further used for determining a second stress drop according to a second target corner frequency, a second target seismic moment and a medium wave velocity;

and the seismic motion time-course graph generation module is specifically used for generating a third seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave speed, the first stress drop and the second stress drop.

In a third aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory, and a bus; the processor and the memory complete mutual communication through a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing the seismogram determination method as in the first aspect.

In a fourth aspect, embodiments of the present application provide a non-transitory computer readable storage medium storing computer instructions that cause a computer to perform a seismic timeline method as in the first aspect.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic diagram illustrating interaction between a terminal device and a server according to an embodiment of the present application;

FIG. 2 is a flowchart illustrating a method for determining a seismoelectric time profile according to an embodiment of the present disclosure;

FIG. 3 is a flowchart illustrating steps of a method for determining a stress drop when a seismic frequency component belongs to a first frequency interval according to an embodiment of the present disclosure;

FIG. 4 is a single corner frequency source spectrogram provided in an embodiment of the present application when the simulated seismic magnitude is 7 and the seismic frequency component belongs to a first frequency interval;

FIG. 5 is a flowchart illustrating steps of a method for determining a stress drop when a seismic frequency component belongs to a second frequency interval according to an embodiment of the present disclosure;

FIG. 6 is a single corner frequency seismic source spectrogram provided in an embodiment of the present application when the simulated seismic magnitude is 7 and the seismic frequency component belongs to a second frequency interval;

FIG. 7 is a flowchart illustrating steps of a method for determining stress drop when seismic frequency components belong to a third frequency interval according to an embodiment of the present disclosure;

FIG. 8 is a single corner frequency seismic source spectrogram provided in an embodiment of the present application when the simulated seismic magnitude is 7 and the seismic frequency components belong to a third frequency interval;

fig. 9 is a block diagram illustrating a structure of a seismic time-course determining apparatus according to an embodiment of the present disclosure;

fig. 10 is a block diagram of an electronic device provided for an embodiment of the present application and configured to perform a method according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Description of the terms:

single-corner frequency seismic source spectrum, double-corner frequency seismic source spectrum: the seismic source spectrum is an acceleration seismic source spectrum.

Corner frequency: the frequency is corresponding to the starting point of the seismic amplitude which is increased or decreased from the steady state.

Seismic moment: representing the couple of the magnitude of the earthquake.

Free surface magnification factor: after the seismic waves are transmitted from the underground to the surface, the seismic waves are amplified due to the influence of reflection.

Horizontal component coefficient: the proportion distribution of the energy of the earthquake in the horizontal direction is referred to.

The wave velocity of the medium: the velocity of the shear wave in the earth at the source.

Site amplification: is a function relation for seismic motion amplification obtained according to a geological structure.

Site attenuation: and obtaining a function relation for reducing the earthquake motion according to the geological structure.

Quality factor: the important physical parameters of the earth medium are described, which are expressed by the ratio of stored energy and consumed energy in one wave propagation period, and the intensity of the medium on the energy absorption of the seismic waves is described.

Geometric diffusion: the energy generated by the seismic source fracture propagates through the earth medium in all directions and reaches the station with much less energy than that released by the earthquake, and the phenomenon in which the energy is reduced due to the increase of the propagation area is called geometric diffusion.

Seismic frequency components: the value of the specific frequency of the earthquake motion is the frequency value corresponding to the abscissa of the dual-corner frequency earthquake source spectrum and the single-corner frequency earthquake source spectrum.

The embodiment of the application provides a method for determining a seismic time-course diagram, which is applied to a server. As shown in fig. 2, the server 02 is connected to the terminal 01 for data interaction. The terminal device 01 may be, but is not limited to, an industrial computer or a display screen. When a user needs to simulate an earthquake, simulated seismic data can be input into a data input box in a seismic simulation application installed on the terminal device 01. The simulated seismic parameter data comprise simulated seismic moments, a target frequency interval of a simulated seismic source, medium wave velocity, a geological surface source type of a region to be simulated where the simulated seismic source is located, medium wave velocity, density of a medium, fault structure information and geological structure information. Then, the terminal device 01 transmits the input seismic data to the server 02 in response to a user's click operation on a "start" button of the seismic simulation application. At this time, the server 02 may determine a seismic motion time-course map from the received seismic data. As shown in fig. 3, the seismic time-course graph determining method specifically includes the following steps S1-S5:

s1: the method comprises the steps of obtaining a target frequency interval of a simulated seismic source, a simulated seismic moment, a geological surface source type of a to-be-simulated area where the simulated seismic source is located, medium wave velocity, medium density, fault structure information and geological structure information.

It will be appreciated that the user enters the target frequency interval for the simulated seismic source into a "data entry box" in the seismic simulation application installed on the terminal device 01. The server 02 receives the target frequency interval transmitted by the terminal device 01. The target frequency interval may be a first frequency interval, a second frequency interval, or a third frequency interval. For example, the first frequency interval may be a seismic frequency component of 10 ^-2 A frequency interval of Hz to 100Hz, and a second frequency interval of 100Hz to 10 Hz of seismic frequency component ² A frequency interval of Hz, a third frequency interval may be a seismic frequency component of 10 ^-2 Hz to 10 ² Frequency interval in Hz. And when the local vibration frequency components are in different target frequency intervals, the geological surface source types are different. For example, the first frequency interval corresponds to a background fault plane source, and the second frequency interval corresponds to a strong slip region layer source.

In addition, the means for acquiring the wave velocity of the medium include, but are not limited to, the following two methods: the first method comprises the following steps: the server 02 can directly receive the medium wave speed which is input by the user at the terminal device 01 and transmitted to the server 02, and the second is: firstly, receiving a medium wave speed which is input by a user at the terminal equipment 01 and then transmitted to a to-be-simulated area of the server 02, and then inquiring the medium wave speed according to the to-be-simulated area (the server 02 stores the mapping relation between the to-be-simulated area and the medium wave speed in a one-to-one correspondence mode).

Additionally, the ways to obtain the simulated seismic moments include, but are not limited to, the following two: the first server 02 can directly receive the simulated earthquake moment M which is input by the user at the terminal equipment 01 and transmitted to the server 02 ₀ And the second method comprises the following steps: firstly receiving the earthquake magnitude M input by the user at the terminal equipment 01 and then transmitting the earthquake magnitude M to the server 02 _w Then based on the simulated seismic moment M ₀ And simulating seismic magnitude M _w Is a relational expression of

Converting to obtain a simulated seismic moment M ₀ 。

S2: and generating a dual-corner frequency seismic source spectrum according to the simulated seismic moment and the pre-configured dual-corner frequency seismic source spectrum generation model.

Specifically, the dual-corner frequency seismic source spectrum generation model is S _AS00 (M ₀ ,f)＝(2πf) ² CM ₀ {(1-ε)/[1+(f/f _a ) ² ]]+ε/[1+(f/f _b ) ² ]}. Wherein f is _a Is the first corner frequency, f _b Is a second corner frequency greater than the first corner frequency, ε is a weight, f is a seismic frequency component, S _AS00 (M ₀ F) is a seismic source spectrum function, and C is a set factor influencing the seismic amplitude of seismic motion. In particular, C ═ R _θφ FV/(4πρ _s β _s ) Wherein R is _θφ Is a seismic source radiation factor, F is a free earth surface amplification factor, V is a horizontal seismic energy distribution factor, rho _s Is the density of the medium at the seismic source, beta _s Is the velocity of the medium wave at the seismic source.

When the user inputs the simulated seismic moment M at the terminal equipment 01 ₀ ＝M″ ₀ In the meantime, the server 02 receives the simulated seismic moment M ″, which is transmitted from the terminal device 01 ₀ Then based on the simulated seismic moment M ″ ₀ Calculating a first corner frequency f _a Value of (d), second corner frequency f _b And the value of the weight epsilon. The specific calculation process is as follows:

first corner frequency f _a And simulated seismic moment M ₀ Satisfy the requirement of

When simulating seismic moment M ₀ ＝M″ ₀ Can be according to

Obtaining a first corner frequency f _a Is f ″) _a (ii) a Second corner frequency f _b And simulated seismic moment M ₀ Satisfy the requirement of

When simulating seismic moment M ₀ ＝M″ ₀ In time can be according to

Obtaining a second corner frequency f _b Is f ″) _b (ii) a Weight epsilon and simulated seismic magnitude M _w Satisfy the requirement of

When simulating seismic moment M ₀ ＝M″ ₀ In time can be according to

The value of the weight epsilon is obtained as epsilon ".

Then, the server 02 converts the first corner frequency f ″', described above _a A second corner frequency f ″ _b The sum weight epsilon' is configured in a dual-corner frequency seismic source spectrum generation model to generate a spectrum satisfying S _AS00 (M″ ₀ ,f)＝(2πf) ² CM″ ₀ {(1-ε″)/[1+(f/f″ _a ) ² ]+ε″/[1+(f/f″ _b ) ² ]The dual corner frequency seismic source spectrum of (1).

S3: and generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum. The single-corner frequency seismic source spectrum comprises target corner frequency and target seismic moment.

It is understood that the server 02 may directly receive the target seismic moment which is input by the user at the terminal device 01 and transmitted to the server 02.

Specifically, the single-corner frequency seismic source spectrum generation model is as follows:

wherein, f' _i In order to target the corner frequency of the corner,

is the target seismic moment, and f is the seismic frequency component.

Specifically, the method for acquiring the single-corner frequency seismic source spectrum includes, but is not limited to, the following two methods:

the first method comprises the following steps: inputting target earthquake moment at terminal equipment 01 by user

Then, the server 02 receives the target earthquake moment transmitted by the terminal device 01

Then the target seismic moment

Is configured in a single corner frequency seismic source spectrum generation model to obtain

Subsequently, the frequency configuration to be determined is selected one by one from the set frequency range

And when the variance between the amplitude of the single-corner frequency seismic source spectrum with the frequency to be determined in the target frequency interval and the amplitude of the pre-configured double-corner frequency seismic source spectrum model is the minimum, the single-corner frequency seismic source spectrum with the frequency to be determined and the double-corner frequency seismic source spectrum are successfully fitted. After successful fitting, is configured to

Is determined as the target corner frequency f ″ _i . Understandably, the generated single-corner frequency seismic source spectrum satisfies

And the second method comprises the following steps: selecting one by one the frequency configuration to be determined in view of the set frequency range

Generating single corner frequenciesThe calculation amount is large in a mode of frequency source spectrum. Therefore, the target corner frequency can be obtained by adjusting the adjustment factor of the corner frequency corresponding to the target frequency interval in the dual-corner seismic source spectrum. Specifically, the product of the adjustment factor multiplied by the corner frequency corresponding to the target frequency interval may be configured to the frequency to be determined as the frequency to be determined

And by continuously changing the size of the adjusting factor, configuring a single-corner frequency seismic source spectrum with the frequency to be determined, wherein the variance between the amplitude of the target frequency interval and the amplitude of the pre-configured double-corner frequency seismic source spectrum model is minimum, wherein the adjusting factor is a constant between 0 and 1. The mode of generating the single-corner frequency seismic source spectrum can greatly reduce the calculation amount and save the calculation resources.

S4: and determining the stress drop of the region to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity.

Specifically, the server 02 may be based on an equation

And determining the stress drop of the region to be simulated in the target frequency interval. Wherein,

is a target seismic moment, f _i "is the target corner frequency, Δ σ _i Is the stress drop.

S5: and generating a seismic motion time-course diagram in a target frequency interval according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity and the stress drop.

Specifically, a user inputs the density of a medium of a region to be simulated where a simulated seismic source is located, fault structure information and geological structure information of the region to be simulated at the terminal device 01; the server 02 receives the information transmitted by the terminal device 01, and generates a seismic motion time-course diagram according to the simulated seismic moment, the density, the fault structure information, the geological structure information, the medium wave velocity, the first stress drop and the second stress drop. Based on the above, the earthquake and earthquake motion time-course graph is generated according to the density, the fault structure information, the geological structure information, the medium wave velocity and the stress drop of the region to be simulated in the target frequency interval, and under the condition that the accuracy of the first stress drop and the accuracy of the second stress drop are higher, the earthquake and earthquake motion time-course graph generated on the basis of the first stress drop and the second stress drop can reflect the earthquake motion condition of the third frequency interval more accurately, so that the earthquake and earthquake risk assessment of the high-rise building structure can be performed more accurately.

The following detailed description describes implementations of S3-S4 that may include, but are not limited to, the following three specific examples:

the first embodiment: when the target frequency interval is a frequency interval with seismic frequency components lower than a preset threshold and the geological surface source type is a background fault surface source, the target corner frequency is a first target corner frequency, and the target seismic moment is a first target seismic moment. Thus, as shown in fig. 3, the specific implementation procedures of S3-S4 may include S11-S12, wherein,

s11: and when the target frequency interval is a frequency interval with seismic frequency components lower than a preset threshold value and the geological surface source type is a background fault surface source, generating a model and a dual-corner frequency seismic source spectrum according to the simulated seismic moment and a preset single-corner frequency seismic source spectrum, and generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval.

The single-corner frequency seismic source spectrum comprises a first target corner frequency and a first target seismic moment.

When the geological surface source type is a background fault surface source, the seismic motion frequency component belongs to a frequency interval lower than a preset threshold value. In the frequency interval of which the earthquake motion frequency component is lower than the preset threshold value, the single corner frequency earthquake source spectrum generation model is

Wherein, f' _a For the first target corner frequency, the corner frequency,

is a firstTarget seismic moment, f is seismic frequency component. Since the background fault plane source reflects the case that the earthquake moves in the third frequency interval, the first target earthquake moment

And simulated seismic moment M ₀ The same is true. If the first target seismic moment is

Then, in the same manner as in S3 above, a single corner frequency seismic source spectrum of a frequency interval in which the seismic frequency component is lower than the preset threshold value is generated, and the value f ″' of the first target corner frequency is obtained _a . The single-corner frequency seismic source spectrum of the frequency interval with the seismic frequency components lower than the preset threshold value can more accurately reflect the corresponding relation between the seismic frequency components and the seismic amplitude in the frequency interval with the seismic frequency components lower than the preset threshold value.

As shown in fig. 4, the following illustrates how to obtain the first target corner frequency when the simulated seismic magnitude input by the user at the terminal device 01 is 7 levels and the target frequency interval is the first frequency interval. The user inputs the simulated earthquake magnitude of 7 levels into a data input box in an earthquake simulation application program installed on the terminal device 01, and the server 02 receives the 7 levels transmitted from the terminal device 01. Then, based on the simulated seismic moment M ₀ And simulating seismic magnitude M _w Is a relational expression of

The simulated seismic moment is 3.548 multiplied by 10 ²⁶ dyne·cm。

The known simulated seismic moment is 3.548 multiplied by 10 ²⁶ dyne cm can be satisfied in the same manner as in S2 described above

S _AS00 (3.548*10 ²⁶ ,f)＝(2πf) ² C*3.548*10 ²⁶ {0.93/[1+(f/0.05) ² ]+0.07/(f/0.36) ² ]The dual-corner frequency seismic source spectrum of fig. 4. The first target can be found from the above-mentioned principle of S11The seismic moment is the same as the simulated seismic moment, so the first target seismic moment is also 3.548 multiplied by 10 ²⁶ dyne cm. Then, the first target seismic moment is 3.548 multiplied by 10 ²⁶ Configuring dyne cm on single corner frequency seismic source spectrum generation model to obtain S _brune ((3.548*10 ²⁶ ,f)＝(2πf) ² C*3.548*10 ²⁶ /[1+(f/f′ _a ) ² ]. The product of the adjustment factor a multiplied by the first corner frequency can then be configured as the frequency to be determined to

And continuously changing the size of the adjusting factor to configure a single-corner frequency seismic source spectrum with the frequency to be determined, wherein the variance between the amplitude of the target frequency interval and the amplitude of the pre-configured double-corner frequency seismic source spectrum model is minimum, and the configured frequency to be determined is 0.0325 Hz. Determining the frequency to be determined to be 0.0325Hz as a first target corner frequency, wherein the adjustment factor a is 0.65, and the first target corner frequency is 0.0325Hz, as shown in FIG. 4, the first single-corner frequency seismic source spectrum is the single-corner frequency seismic source spectrum with the smallest variance between the seismic amplitude of the target frequency interval and the seismic amplitude of the pre-configured dual-corner frequency seismic source spectrum model.

S12: and determining a first stress drop according to the first target corner frequency, the first target seismic moment and the medium wave velocity.

Specifically, the server 02 may be based on an equation

is the first target seismic moment, f ″) _a Is a first target corner frequency, Δ σ _a Is the first stress drop.

After the first stress drop is determined, the user can input the density, fault structure information and geological structure information of the medium of the region to be simulated where the seismic source is simulated at the terminal equipment 01; the server 02 receives the density, the fault structure information and the geological structure information of the medium of the region to be simulated where the earthquake source to be simulated is located, which are sent by the terminal device 01, and generates an earthquake motion time-course graph according to the simulated earthquake moment, the density, the fault structure information, the geological structure information, the medium wave velocity and the first stress drop. The obtained first stress drop is more accurate, so that the earthquake motion time-history graph generated on the basis of the stress drop can more accurately reflect the earthquake motion condition in the frequency interval with the earthquake motion frequency component lower than the preset threshold value, and the earthquake resistance analysis of the high-rise building structure and the danger evaluation of the nuclear power station earthquake can be more reliably carried out.

The second embodiment: and when the target frequency interval is a frequency interval with seismic frequency components higher than a preset threshold and the geological surface source type is a strong slip zone layer surface source, the target corner frequency is a second target corner frequency, and the target seismic moment is a second target seismic moment. Thus, as shown in FIG. 5, the specific implementation procedures of S3-S4 may include S21-S22, wherein

S21: and when the target frequency interval is a frequency interval with the seismic frequency components higher than a preset threshold value and the geological area source type is a strong slip zone area source, generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum.

The single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment.

When the geological surface source type is a background fault surface source, the seismic motion frequency component belongs to a frequency interval higher than a preset threshold value. In a frequency interval with the earthquake motion frequency component higher than a preset threshold value, a single corner frequency earthquake source spectrum generation model is

Wherein, f' _b For the second target corner frequency to be used,

is the second target seismic moment, and f is the seismic frequency component. Due to strong slipThe moving-zone layer source reflects the seismic motion of the second frequency interval of the earthquake, so that the seismic moment M is simulated ₀ And second target seismic moment

Satisfies the following conditions:

the value of K is the ratio of the area of the source of the strong slip region layer to the area of the source of the background fault layer, and usually, the value of K is 0.2-0.25. If the second target seismic moment is

Then, in the same manner as in S3, a single corner frequency seismic source spectrum of a frequency interval in which the seismic frequency component is higher than the preset threshold value is generated, and a value f ″ of the second target corner frequency is obtained _b . The single-corner frequency seismic source spectrum of the frequency interval with the seismic frequency component higher than the preset threshold value can more accurately reflect the corresponding relation between the seismic frequency component and the seismic amplitude in the frequency interval with the seismic frequency component lower than the preset threshold value.

As shown in fig. 6, the following illustrates how to obtain the second target corner frequency when the simulated seismic magnitude input by the user at the terminal device 01 is 7 levels and the target frequency interval is the second frequency interval. The user inputs the simulated earthquake magnitude of 7 levels into a data input box in an earthquake simulation application program installed on the terminal equipment 01, and the server 02 receives the 7 levels transmitted from the terminal equipment 01 and then simulates the earthquake moment M ₀ And simulating seismic magnitude M _w Is a relational expression of

The simulated seismic moment is 3.548 x 10 ²⁶ dyne cm. At a known simulated seismic moment of 3.548 x 10 ²⁶ dyne cm can be satisfied in the same manner as in S2 described above

S _AS00 (3.548*10 ²⁶ ,f)＝(2πf) ² C*3.548*10 ²⁶ {0.93/[1+(f/0.05) ² ]+0.07/(f/0.36) ² ]The dual-corner frequency seismic source spectrum of fig. 6. Because the ratio of the area of the layer source in the strong slip region to the area of the background fault source is 0.2, the earthquake moment M is simulated according to ₀ And second target seismic moment

Is a relational expression of

Obtaining a second target seismic moment of 7.096 x 10 ²⁵ dyne cm. Then, the second target seismic moment 7.096 x 10 is added ²⁵ Configuring dyne cm on single corner frequency seismic source spectrum generation model to obtain S _brune (7.096*10 ²⁵ ,f)＝(2πf) ² C*7.096*10 ²⁵ /[1+(f/f′ _b ) ² ]. Subsequently, the frequency to be determined of the single-corner frequency seismic source spectrum with the frequency to be determined may be configured, and the magnitude of the frequency to be determined is continuously changed, so that the single-corner frequency seismic source spectrum with the frequency to be determined is configured, and the variance between the amplitude of the dual-corner frequency seismic source spectrum and the target frequency interval is the smallest, at this time, the second target corner frequency is 0.1044Hz, for example, the second single-corner frequency seismic source spectrum in fig. 6 is the single-corner frequency seismic source spectrum with the smallest variance between the amplitude of the target frequency interval and the amplitude of the pre-configured dual-corner frequency seismic source spectrum model.

S22: and determining a second stress drop according to the second target corner frequency, the second target seismic moment and the medium wave velocity.

Specifically, the server 02 may be based on an equation

is a second target seismic moment, is a second target corner frequency, Δ σ _b Is the second stress drop.

After the second stress drop is determined, the user can also input the density of the medium of the region to be simulated where the seismic source is simulated, fault structure information and geological structure information of the region to be simulated at the terminal equipment 01; the server 02 receives the information transmitted by the terminal device 01, and generates a seismic motion time-course diagram according to the simulated seismic moment, the density, the fault structure information, the geological structure information, the medium wave velocity and the second stress drop. The obtained second stress drop is more accurate, so that the earthquake motion time-history graph generated on the basis of the stress drop can more accurately reflect the earthquake motion condition in the frequency interval with the earthquake motion frequency component higher than the preset threshold value, and the earthquake-resistant analysis and the earthquake risk assessment of the nuclear power station can be more reliably carried out on the high-rise building structure.

The third embodiment: the stress drop comprises a first stress drop and a second stress drop; the target frequency interval is a third frequency interval, the third frequency interval comprises a first frequency interval and a second frequency interval, the first frequency interval is a frequency interval with earthquake motion frequency components lower than a preset threshold, and the second frequency interval is a frequency interval with earthquake motion frequency components higher than the preset threshold; the target seismic moments comprise a first target seismic moment and a second target seismic moment; the geological surface source types comprise a background fault surface source and a strong slip region layer surface source. Thus, as shown in FIG. 7, the detailed implementation procedures of S3-S4 may include S31-S34, wherein

S31: when the earthquake motion frequency component belongs to a first frequency interval and the geological surface source type is a background fault surface source, a first single-corner frequency earthquake source spectrum with the smallest amplitude variance between the amplitude of the first frequency interval and the amplitude of the double-corner frequency earthquake source spectrum in the first frequency interval is generated according to the simulated earthquake moment, a preset single-corner frequency earthquake source spectrum generation model and a double-corner frequency earthquake source spectrum.

The first single corner frequency seismic source spectrum comprises a first target corner frequency and a first target seismic moment.

It is understood that the manner of generating the first single-corner frequency seismic source spectrum in S31 is the same as that of S11, and is not repeated herein.

S32: and when the seismic frequency component belongs to a second frequency interval and the geological surface source type is a strong slip zone layer source, generating a second single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the seismic amplitude of the second frequency interval and the seismic amplitude of the double-corner frequency seismic source spectrum in the second frequency interval according to the simulated seismic moment and a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the second single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment.

It is understood that the manner of generating the second single-corner frequency seismic source spectrum in S32 is the same as that of S21, and is not repeated here.

S33: and determining a first stress drop according to the first target corner frequency, the first target seismic moment and the medium wave velocity.

It is understood that the manner of determining the first stress drop in S33 is the same as that of S12 described above, and thus will not be described herein.

S34: and determining a second stress drop according to the second target corner frequency, the second target seismic moment and the medium wave velocity.

It is understood that the manner of determining the second stress drop in S34 is the same as that of S22 described above, and will not be described herein again.

S33 and S34 may be executed first in S33 and then in S34, or first in S34 and then in S33, or in S33 and S34. In fig. 7, the manner in which S33 is first executed and S34 is executed is employed.

The dual-corner frequency seismic source spectrum positioned in the first frequency interval can more accurately reflect the corresponding relation between the seismic frequency components and the seismic amplitude of the seismic frequency components in the first frequency interval; therefore, the corresponding relation between the seismic amplitude and the seismic motion frequency component reflected in the first frequency interval by the first single-corner frequency seismic source spectrum with the minimum amplitude variance in the first frequency interval with the dual-corner frequency seismic source spectrum in the first frequency interval is more accurate. The dual-corner frequency seismic source spectrum positioned in the second frequency interval can more accurately reflect the corresponding relation between the seismic motion frequency component and the seismic amplitude of the seismic motion frequency component in the second frequency interval; therefore, the corresponding relation between the seismic amplitude and the seismic motion frequency component reflected by the dual-corner frequency seismic source spectrum in the second frequency interval, which has the smallest amplitude variance with the dual-corner frequency seismic source spectrum in the second frequency interval, in the second frequency interval is more accurate. Based on the method, the determined first stress drop is more accurate according to the medium wave speed, the first target corner frequency of the first single corner frequency seismic source spectrum and the first target seismic moment; and the second stress drop determined according to the medium wave velocity, the second target corner frequency of the second single corner frequency seismic source spectrum and the second target seismic moment is more accurate.

Fig. 8 is a corresponding relationship between the seismic amplitude and the seismic frequency component obtained by fitting when the simulated seismic magnitude is 7 levels and the target frequency interval is the third frequency interval. In the frequency interval in which the seismic frequency component is lower than the preset threshold, the corresponding relationship between the seismic frequency component and the seismic amplitude in fig. 8 and 4 is consistent, and the fitting process is consistent with the mode of the first frequency interval. In the frequency interval where the seismic frequency component belongs to the frequency interval higher than the preset threshold, the corresponding relationship between the seismic frequency component and the seismic amplitude in fig. 8 and 6 is consistent, and the fitting process is consistent with the mode of the second frequency interval.

In the embodiment of the present application, a seismic time-course diagram determining apparatus 900 is further provided, and it should be noted that, the specific implementation method and the resulting beneficial effects of the seismic time-course diagram determining apparatus 900 are the same as those of the above embodiment, and reference may be made to the above description. As shown in fig. 9, the method may specifically include the following modules:

the information acquisition module 901 is configured to acquire a target frequency interval of the simulated seismic source, a simulated seismic moment, a geological surface source type of a region to be simulated where the simulated seismic source is located, density of a medium wave velocity medium, fault structure information, and geological structure information.

And a seismic source spectrum generation module 902, configured to generate a dual-corner frequency seismic source spectrum according to the simulated seismic moment and the pre-configured dual-corner frequency seismic source spectrum generation model.

The seismic source spectrum generating module 902 is further configured to generate a single-corner frequency seismic source spectrum with the smallest seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude of the double-corner frequency seismic source spectrum of the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, the preset single-corner frequency seismic source spectrum generating model, and the double-corner frequency seismic source spectrum. The single-corner frequency seismic source spectrum comprises target corner frequency and target seismic moment.

And the stress drop determining module 903 is configured to determine a stress drop of the region to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment, and the medium wave velocity.

And the seismic motion time-course graph generating module 904 is configured to generate a seismic motion time-course graph in the target frequency interval according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, and the stress drop.

Optionally, the seismic source spectrum generating module 902 is specifically configured to, when the target frequency interval is a frequency interval in which seismic frequency components are lower than a preset threshold and the geological area source type is a background fault area source, generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance between the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, the preset single-corner frequency seismic source spectrum generating model, and the dual-corner frequency seismic source spectrum. The single-corner frequency seismic source spectrum comprises a first target corner frequency and a first target seismic moment.

The stress drop determining module 903 is specifically configured to determine a first stress drop according to the first target corner frequency, the first target seismic moment, and the medium wave velocity.

The seismic motion time-course graph generating module 904 is specifically configured to generate a first seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, and the first stress drop.

Optionally, the seismic source spectrum generating module 902 is specifically configured to, when the target frequency interval is a frequency interval in which seismic frequency components are higher than a preset threshold and the geological area source type is a strong slip zone area source, generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, the preset single-corner frequency seismic source spectrum generating model, and the dual-corner frequency seismic source spectrum. The single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment.

The stress drop determining module 903 is specifically configured to determine a second stress drop according to a second target corner frequency, a second target seismic moment, and a medium wave velocity.

Optionally, the seismic source spectrum generating module 902 is specifically configured to, when the seismic frequency component belongs to a first frequency interval and the geological surface source type is a background fault surface source, generate a first single-corner frequency seismic source spectrum with a minimum seismic amplitude variance in the first frequency interval between a seismic amplitude in the first frequency interval and a seismic amplitude variance in the first frequency interval between the dual-corner frequency seismic source spectrum according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generating model, and the dual-corner frequency seismic source spectrum. The first single-corner frequency seismic source spectrum comprises a first target corner frequency and a first target seismic moment. And when the seismic frequency component belongs to a second frequency interval and the geological surface source type is a strong slip region layer surface source, generating a second single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the seismic amplitude of the second frequency interval and the seismic amplitude of the double-corner frequency seismic source spectrum in the second frequency interval according to the simulated seismic moment and a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the seismic amplitude of the second frequency interval and the seismic amplitude variance of the double-corner frequency seismic source spectrum in the second frequency interval are different. The second single corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment.

A stress drop determination module 903, specifically configured to determine a first stress drop according to the first target corner frequency, the first target seismic moment, and the medium wave velocity; and determining a second stress drop according to the second target corner frequency, the second target seismic moment and the medium wave velocity.

The seismic time-course graph generating module 904 is specifically configured to generate a second seismic time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, and the second stress drop.

Optionally, the seismic source spectrum generating module 902 is specifically configured to, when the target frequency interval is a frequency interval in which seismic frequency components are lower than a preset threshold and the geological surface source type is a background fault surface source, generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between a seismic amplitude in the target frequency interval and a seismic amplitude variance between the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model, and the dual-corner frequency seismic source spectrum, where the single-corner frequency seismic source spectrum includes a first target corner frequency and a first target seismic moment;

the seismic source spectrum generation module 902 is further configured to generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the target frequency interval and the target frequency interval of the dual-corner frequency seismic source spectrum according to the simulated seismic moment, the preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum when the target frequency interval is a frequency interval in which seismic frequency components are higher than a preset threshold and the geological area source type is a strong slip zone area source, wherein the single-corner frequency seismic source spectrum includes a second target corner frequency and a second target seismic moment;

a stress drop determination module 903, specifically configured to determine a first stress drop according to the first target corner frequency, the first target seismic moment, and the medium wave velocity;

the stress drop determining module 903 is further configured to determine a second stress drop according to the second target corner frequency, the second target seismic moment, and the medium wave velocity;

the seismic motion time history map generating module 904 is specifically configured to generate a third seismic motion time history map according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, the first stress reduction, and the second stress reduction, where the third seismic motion time history map includes a first seismic motion time history map and a second seismic motion time history map.

Referring to fig. 10, fig. 10 is a block diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may be the server 02 described above. The electronic device 100 includes: at least one processor 101, at least one communication interface 102, at least one memory 103, and at least one communication bus 104. Wherein, the communication bus 104 is used for realizing direct connection communication of these components, the communication interface 102 is used for communicating signaling or data with other node devices, and the memory 103 stores machine readable instructions executable by the processor 101. When the electronic device 100 is in operation, the processor 101 communicates with the memory 103 via the communication bus 104, and the machine-readable instructions, when invoked by the processor 101, perform the seismogram determination method described above.

The processor 101 may be an integrated circuit chip having signal processing capabilities. The processor 101 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. Which may implement or perform the various methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The Memory 103 may include, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), and the like.

It will be appreciated that the configuration shown in FIG. 10 is merely illustrative and that electronic device 100 may include more or fewer components than shown in FIG. 10 or have a different configuration than shown in FIG. 10. The components shown in fig. 10 may be implemented in hardware, software, or a combination thereof. In the embodiment of the present application, the electronic device 100 may be, but is not limited to, a physical device such as a desktop computer, a notebook computer, and the like, and may also be a virtual device such as a virtual machine and the like. In addition, the electronic device 100 is not necessarily a single device, but may be a combination of multiple devices, such as a server 02 cluster, and the like. In the embodiment of the present application, the server 02 in the seismic motion time-course determining method may be implemented by using the electronic device 100 shown in fig. 10.

Embodiments of the present application further provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, which when executed by a computer, the computer is capable of performing the steps of the seismic profile determination method in the above embodiments, for example, including:

the method comprises the steps of obtaining a target frequency interval of a simulated seismic source, a simulated seismic moment, a geological surface source type of a region to be simulated where the simulated seismic source is located, a medium wave velocity, a medium density, fault structure information and geological structure information.

And generating a dual-corner frequency seismic source spectrum according to the simulated seismic moment and the pre-configured dual-corner frequency seismic source spectrum generation model.

And generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises the target corner frequency and the target seismic moment.

And determining the stress drop of the region to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining a seismic time-course graph, comprising:

generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises target corner frequency and target seismic moment;

determining the stress drop of the region to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity;

and generating a seismic motion time-course diagram in the target frequency interval according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity and the stress drop.

2. The method of claim 1, wherein the stress drop comprises a first stress drop, the target corner frequency comprises a first target corner frequency, the target seismic moment is a first target seismic moment, the seismic motion time profile of the target frequency interval is a first seismic motion time profile, and the generating of the single-corner frequency seismic source spectrum with the minimum amplitude variance between the target frequency interval and the target frequency interval of the dual-corner frequency seismic source spectrum according to the target frequency interval, the simulated seismic moment, the geological surface source type, the preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum comprises:

when the target frequency interval is a frequency interval with seismic frequency components lower than a preset threshold value and the geological surface source type is a background fault surface source, generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises the first target corner frequency and the first target seismic moment;

determining the stress drop of the region to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity, wherein the determining comprises the following steps:

determining the first stress drop according to the first target corner frequency, the first target seismic moment and the medium wave velocity;

generating a seismic motion time-course diagram in the target frequency interval according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity and the stress drop, and comprising the following steps of:

and generating a first seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity and the first stress reduction.

3. The method of claim 1, wherein the stress drop comprises a second stress drop, the target corner frequency comprises a second target corner frequency, the target seismic moment is a second target seismic moment, the seismic motion time profile of the target frequency interval is a second seismic time profile, and the generating of the single-corner frequency seismic source spectrum with the minimum amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, the preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum comprises:

when the target frequency interval is a frequency interval with seismic frequency components higher than a preset threshold value and the geological surface source type is a strong slip zone layer surface source, generating a single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance between the dual-corner frequency seismic source spectrum and the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises the second target corner frequency and the second target seismic moment;

determining the second stress drop according to the second target corner frequency, the second target seismic moment and the medium wave velocity;

4. The method of claim 1, wherein the stress drop comprises a first stress drop and a second stress drop, the target frequency interval is a third frequency interval, the seismic motion time profile of the target frequency interval is a third seismic motion time profile, the third seismic motion time profile comprises a first seismic motion time profile and a second seismic motion time profile, the third frequency interval comprises a first frequency interval and a second frequency interval, the first frequency interval is a frequency interval in which seismic motion frequency components are lower than a preset threshold, the second frequency interval is a frequency interval in which seismic motion frequency components are higher than a preset threshold, the target seismic moment comprises a first target seismic moment and a second target seismic moment, and the type of the geological surface source comprises a background fault surface source and a strong glide region surface source;

the generating of the single-corner frequency seismic source spectrum with the minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, the preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum comprises the following steps:

when the seismic frequency component belongs to the first frequency interval and the geological surface source type is a background fault surface source, generating a first single-corner frequency seismic source spectrum with the smallest amplitude variance between the amplitude of the first frequency interval and the amplitude of the double-corner frequency seismic source spectrum in the first frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the first single-corner frequency seismic source spectrum comprises a first target corner frequency and the first target seismic moment;

when the seismic frequency component belongs to the second frequency interval and the geological surface source type is a strong slip zone layer surface source, generating a second single-corner frequency seismic source spectrum with the smallest seismic amplitude variance between the seismic amplitude of the second frequency interval and the seismic amplitude of the double-corner frequency seismic source spectrum in the second frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum, wherein the second single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment;

wherein the first target seismic moment is greater than the second target seismic moment, the first target corner frequency is less than the second target corner frequency;

determining a first stress drop in the first frequency interval according to the first target corner frequency, the first target seismic moment and the medium wave velocity;

determining a second stress drop in the second frequency interval according to the second target corner frequency, the second target seismic moment and the medium wave velocity;

and generating a third seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, the first stress drop and the second stress drop.

5. An earth-vibration time-course determining apparatus, comprising:

the information acquisition module is used for acquiring a target frequency interval of a simulated seismic source, a simulated seismic moment, a geological surface source type of a region to be simulated where the simulated seismic source is located, a medium wave speed, a medium density, fault structure information and geological structure information;

the seismic source spectrum generation module is used for generating a dual-corner frequency seismic source spectrum according to the simulated seismic moment and a pre-configured dual-corner frequency seismic source spectrum generation model;

the seismic source spectrum generation module is further configured to generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the target frequency interval and a seismic amplitude variance between the dual-corner frequency seismic source spectrum and the target frequency interval according to the target frequency interval, the simulated seismic moment, the geological surface source type, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum, wherein the single-corner frequency seismic source spectrum comprises the target corner frequency and the target seismic moment;

the stress drop determining module is used for determining the stress drop of the area to be simulated in the target frequency interval according to the target corner frequency, the target seismic moment and the medium wave velocity;

and the seismic motion time-course graph generation module is used for generating a seismic motion time-course graph in the target frequency interval according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity and the stress drop.

6. The apparatus of claim 5,

the seismic source spectrum generation module is specifically configured to generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the seismic amplitude of the target frequency interval and the seismic amplitude variance between the dual-corner frequency seismic source spectrum and the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum when the target frequency interval is a frequency interval in which seismic frequency components are lower than a preset threshold and the geological area source type is a background fault area source, wherein the single-corner frequency seismic source spectrum includes a first target corner frequency and a first target seismic moment;

the stress drop determination module is specifically configured to determine a first stress drop according to the first target corner frequency, the first target seismic moment, and the medium wave velocity;

the seismic motion time-course graph generating module is specifically configured to generate a first seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, and the first stress drop.

7. The apparatus of claim 5,

the seismic source spectrum generation module is specifically configured to generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the target frequency interval and the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the double-corner frequency seismic source spectrum when the target frequency interval is a frequency interval in which seismic frequency components are higher than a preset threshold and the geological area source type is a strong slip zone area source, wherein the single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment;

the stress drop determination module is specifically configured to determine a second stress drop according to the second target corner frequency, the second target seismic moment, and the medium wave velocity;

the seismic motion time-course graph generating module is specifically configured to generate a second seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, and the second stress drop.

8. The apparatus of claim 5,

the seismic source spectrum generation module is further configured to generate a single-corner frequency seismic source spectrum with a minimum seismic amplitude variance between the target frequency interval and the dual-corner frequency seismic source spectrum in the target frequency interval according to the simulated seismic moment, a preset single-corner frequency seismic source spectrum generation model and the dual-corner frequency seismic source spectrum when the target frequency interval is a frequency interval in which seismic frequency components are higher than a preset threshold and the geological area source type is a strong slip zone area source, wherein the single-corner frequency seismic source spectrum comprises a second target corner frequency and a second target seismic moment;

the stress drop determining module is further configured to determine a second stress drop according to the second target corner frequency, the second target seismic moment, and the medium wave velocity;

the seismic motion time-course graph generating module is specifically configured to generate a third seismic motion time-course graph according to the density of the medium, the fault structure information, the geological structure information, the medium wave velocity, the first stress drop and the second stress drop, where the third seismic motion time-course graph includes a first seismic motion time-course graph and a second seismic motion time-course graph.

9. An electronic device, comprising: a processor, a memory, and a bus;

the processor and the memory are communicated with each other through the bus;

the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1-4.

10. A non-transitory computer-readable storage medium storing computer instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 1-4.