CN116340721A - Train speed calculation method, device, equipment and readable storage medium - Google Patents
Train speed calculation method, device, equipment and readable storage medium Download PDFInfo
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Abstract
The invention provides a train speed calculation method, a device, equipment and a readable storage medium, wherein the method comprises the steps of obtaining first information, second information and third information, wherein the first information is the instant speed of a first train passing through a current bridge pier, the second information is the ground vibration speed corresponding to the instant speed at a first position, and the third information is the ground vibration speed corresponding to the instant speed at a second position; the first position and the second position are both arranged on the connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target; establishing a vibration speed attenuation model according to the first information, the second information and the third information, wherein the vibration speed attenuation model is used for calculating the ground vibration speed corresponding to the transmission of the instantaneous speed to the target; and obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold value and the vibration speed attenuation model. The invention can quickly obtain the maximum speed allowed by the train when passing through the target position through the vibration speed attenuation model.
Description
Technical Field
The present invention relates to the field of environmental engineering, and in particular, to a train speed calculation method, apparatus, device, and readable storage medium.
Background
Compared with the common urban roads, the environmental vibration generated by urban rail transit has the characteristics of high intensity, high frequency, long period and the like, and can have certain influence on surrounding buildings, especially history cultural buildings, in the prior art, the faster the train speed is, the larger the vibration caused by the train speed is, so that the train is more likely to influence the ancient buildings around the train track, and therefore, a train speed calculation method is needed to calculate the maximum speed of the train when the train passes around the ancient buildings, so that the structure of the ancient buildings around the train is not influenced.
Disclosure of Invention
The invention aims to provide a train speed calculating method, a train speed calculating device, a train speed calculating equipment and a readable storage medium, so as to solve the problems.
In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:
in one aspect, an embodiment of the present application provides a train speed calculating method, including:
acquiring first information, second information and third information, wherein the first information is the instant speed of a first train passing through a current bridge pier, the second information is the ground vibration speed corresponding to the instant speed at a first position, and the third information is the ground vibration speed corresponding to the instant speed at a second position; the first position and the second position are both arranged on a connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target;
establishing a vibration speed attenuation model according to the first information, the second information and the third information, wherein the vibration speed attenuation model is used for calculating the ground vibration speed corresponding to the instant speed conducted to the target;
and obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold and the vibration speed attenuation model.
In a second aspect, embodiments of the present application provide a train speed calculation device, the device including:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring first information, second information and third information, the first information is the instant speed of a first train passing through a current bridge pier, the second information is the ground vibration speed corresponding to the instant speed at a first position, and the third information is the ground vibration speed corresponding to the instant speed at a second position; the first position and the second position are both arranged on a connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target;
the establishing module is used for establishing a vibration speed attenuation model according to the first information, the second information and the third information, and the vibration speed attenuation model is used for calculating the ground vibration speed corresponding to the instant speed conducted to the target;
and the calculation module is used for obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold value and the vibration speed attenuation model.
In a third aspect, embodiments of the present application provide a train speed calculation device comprising a memory and a processor. The memory is used for storing a computer program; the processor is used for implementing the steps of the train speed calculation method when executing the computer program.
In a fourth aspect, embodiments of the present application provide a readable storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the train speed calculation method described above.
The beneficial effects of the invention are as follows: the invention carries out systematic research on vibration speed and attenuation law generated during running of the straddle-type monorail train, obtains the attenuation law of the vibration speed after being conducted along with the distance, carries out regression analysis on the basis, builds a ground vibration speed prediction model caused by running of the straddle-type monorail train, namely a vibration speed attenuation model, provides a quantification basis for ground vibration speed prediction caused by running of the straddle-type monorail train, can calculate the corresponding ground vibration speed of the instantaneous speed of the train at a target position through the prediction model, judges whether the ground vibration speed at the target position exceeds the maximum ground vibration speed allowed by a cultural relic building at the target position, can calculate the maximum speed allowed by the train when the train passes around the ancient building, and then reduces the influence of rail traffic on the cultural relic building by adopting a mode of reducing the speed, thereby achieving the aim of protecting the structural integrity of the cultural relic building.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a train speed calculation method according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a train speed calculating device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a train speed calculating device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Example 1
The embodiment provides a train speed calculating method, which is used for calculating a scene of a maximum speed allowed by a train passing around a paleo-structure when the paleo-structure exists near a straddling type monorail line.
As shown in fig. 1, the present embodiment provides a train speed calculation method including steps S1, S2, and S3.
S1, acquiring first information, second information and third information, wherein the first information is the instant speed of a first train passing through a current bridge pier, the second information is the ground vibration speed corresponding to the instant speed at a first position, and the third information is the ground vibration speed corresponding to the instant speed at a second position; the first position and the second position are both arranged on a connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target;
in the step, the acquired information and the acquisition conditions are taken as examples of Chongqing rail transit No. 2 line, and 99 effective samples are acquired by selecting bridge pier installation measuring instruments with measurement conditions in a straddling type monorail track, wherein the shortest distance between a first position and the bridge pier is a preset distance, namely a vibration source radius, the vibration source radius is set to be 3m according to the relevant regulations in ancient building industrial vibration prevention technical Specification, therefore, a sensor is arranged at the position, perpendicular to the rail extension direction, of the bridge pier for acquiring the instantaneous speed of a first train passing through the bridge pier and the ground vibration speed at the position, perpendicular to the rail extension direction, of the bridge pier, continuously monitoring is carried out for 30 minutes, 99 effective samples are acquired, and the instantaneous speed of the 99 first trains passing through the bridge pier and the ground vibration speed corresponding to the instantaneous speed at the first position are acquired, in addition, because the short-distance attenuation is fast, the long-distance attenuation is slowed down, the measuring point is arranged with the principle of near-density and far-distance attenuation, and the sensor is arranged within 20m range according to the distribution point requirements of vibration attenuation test about vibration attenuation test in foundation dynamic characteristic Specification (20159-20155-2015 m); a sensor is arranged at intervals of 5m except 20m, then monitoring is carried out for three times, and the vibration speed of the points 3m, 8m, 9m, 10m, 11m and 12m away from the extending direction of the vertical track of the bridge pier is monitored for the first time; secondly, monitoring positions 3m, 15m, 16m, 17m, 18m, 19m and 20m away from the extending direction of the bridge pier vertical track; thirdly, monitoring the positions 3m, 5m, 7m, 25m, 30m, 35m and 40m away from the bridge pier vertical track extending direction, wherein the monitoring time is continuous for 1h, and obtaining ground vibration speeds corresponding to the instantaneous speeds at a plurality of second positions, namely third information.
S2, establishing a vibration speed attenuation model according to the first information, the second information and the third information, wherein the vibration speed attenuation model is used for calculating the ground vibration speed corresponding to the instant speed conducted to the target;
and step S3, obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold value and the vibration speed attenuation model.
In the step, the second train is a train which does not acquire data through a sensor, the first train is a train which acquires data through the sensor, after a vibration speed attenuation model is obtained, the ground vibration speed corresponding to the instantaneous speed at a target position can be obtained only according to the instantaneous speed of the second train passing through a bridge pier without other data, and the maximum instantaneous speed of the second train passing through the bridge pier can be calculated according to the maximum allowable ground vibration speed and the vibration speed attenuation model of the ancient architecture existing at the target position.
At present, compared with the characteristics of high intensity, high frequency, long period and the like of environmental vibration generated by common urban road traffic, urban rail traffic can generate certain influence on surrounding buildings, especially historical cultural buildings, in the prior art, the faster the train speed is, the larger the vibration caused by the faster the train speed is, the more likely the train is to influence the ancient buildings around the train track, so that the influence of the train speed on the ancient building structure is required to be researched, and corresponding specifications are obtained.
Therefore, the embodiment carries out regression analysis and builds a vibration speed attenuation model on the basis of on-site monitoring data of rail transit, the instantaneous speed of the train can be calculated according to the vibration speed attenuation model and is conducted to the corresponding ground vibration speed at the target, meanwhile, the maximum ground vibration speed allowable by various ancient buildings around the straddle type monorail, namely the vibration speed threshold value, can be estimated, and the maximum speed of the train passing through the position can be estimated without affecting the structural integrity of the ancient buildings, and the corresponding specification between the train speed and the vibration speed threshold value of the ancient buildings is obtained.
According to the characteristics, the ground vibration speed prediction method and device can realize low-cost, rapid and direct ground vibration speed prediction calculation, and calculate the ground vibration speed attenuated after different distances are transmitted according to the current ground vibration speed. In addition, according to the vibration speed threshold value, the maximum running speed allowed by the train can be further estimated when the ancient architecture structure at the target is not influenced, and the method provides an economic, accurate and direct calculation method for the train speed calculation.
In a specific embodiment of the disclosure, the step S2 may further include a step S21 and a step S22.
S21, respectively calculating the goodness of fit of the power function, the S function, the growth function and the exponential function to the first information and the second information;
and S22, selecting a curve function with the highest fitting goodness, and performing curve fitting on the first information and the second information to obtain a first function, wherein the first function is a functional relation between the instantaneous speed of the first train passing through the current bridge pier and the ground vibration speed corresponding to the instantaneous speed at the first position.
In this embodiment, taking data collected by a Chongqing city rail transit line No. 2 as an example, by respectively calculating goodness of fit by adopting a power function, an S function, a growing function and an exponential function to perform curve fitting on the first information and the second information, the goodness of fit of the power function is obtained to be the highest, so that the power function is selected to perform curve fitting, and the first function is obtained specifically as follows:
v 0 ＝2.94×10 -9 ×V 6.43
wherein V0 is the ground vibration velocity (mm/s) at the radius of the vibration source, and V is the instantaneous velocity (m/s) of the train passing through the bridge pier, so that the ground vibration velocity at the radius of the vibration source can be estimated only according to the instantaneous speed of the train passing through the bridge pier.
In a specific embodiment of the disclosure, after the step S22, step S23, step S24, and step S25 may further be included.
S23, obtaining a damping law of vibration speed according to an empirical formula of ground vibration damping caused by a vehicle, wherein the damping law comprises a geometric damping law and a damping law;
step S24, a second function is established according to the second information, the third information and the damping law of the vibration speed, wherein the second function is a functional relation between the ground vibration speed corresponding to the instantaneous speed at the first position and the ground vibration speed corresponding to the instantaneous speed at the second position;
and S25, establishing a vibration speed attenuation model according to the first function and the second function.
In this embodiment, according to the empirical formula of ground vibration velocity attenuation proposed by Cui Gaohang, a geometric attenuation law is a power function of distance, and a damping attenuation law is an exponential function of distance, and the attenuation law of ground vibration velocity is specifically expressed as:
A r ＝f 1 (v 0 )f 2 (r)f 3 (r)
wherein f 1 (v 0 ) Representing the functional relation between the ground vibration velocity at the radius of the vibration source and the vibration source intensity, f 2 (r) represents the geometric attenuation of the ground vibration velocity, f 3 (r) represents a damping attenuation portion of the ground vibration velocity.
In a specific embodiment of the disclosure, the step S24 may further include a step S241 and a step S242.
S241, obtaining a power function relation between ground vibration speed attenuation and distance according to the attenuation rule of the ground vibration speed;
and step S242, carrying out regression analysis on the power function relation between the ground vibration velocity attenuation and the distance by utilizing the second information and the third information to obtain a second function.
In this embodiment, the empirical formula of ground vibration speed attenuation proposed by Cui Gaohang is built on the measured data of high-speed railway and the like with larger vibration amplitude and longer high-frequency vibration attenuation distance. The vibration characteristic of the straddle type monorail is small in vibration amplitude and low in vibration frequency, so that geometric attenuation or damping attenuation can be more accordant with the attenuation trend of a power function, and the ground vibration velocity attenuation and distance are obtained by a power function relation, specifically:
wherein x is 0 And the amplitude coefficient of the vibration source is used for reflecting the correlation between the vibration source and the ground vibration velocity at the radius of the vibration source. X is x 1 For synthesizing the attenuation coefficient, reflecting the attenuation rule of the vibration speed along with the distance, carrying out regression analysis on the equation according to the second information and the third information to obtain a second function, wherein the second function specifically comprises the following steps:
A r ＝3.851v 0 r -1.198
wherein r is the distance from the radius of the vibration source; v 0 Therefore, according to the formula, only the current instantaneous speed of the train passing through the piers and the distance from the vibration source radius can be obtained, and the ground vibration speed which is attenuated along the vertical track extension direction along the distance at the vibration source radius can be calculated, in addition, when the train runs between two adjacent piers, the generated vibration speed is the combined action of the two adjacent piers, therefore, the ground vibration speed corresponding to the instantaneous speed at the third position needs to be acquired, namely, the track beam between the two adjacent piers, and the vertical distance from the track beam is 3m, and the empirical formula of the train passing through the straddle type monorail caused vibration when the vibration sources are overlapped is specifically obtained by improving the equivalent amplitude formula proposed by Mo Sheqing:
in the above, v α Is the vibration velocity after superposition at the alpha point; v α1 The vibration velocity of the bridge pier 1 is transmitted to the alpha point; v α2 The vibration velocity of the bridge pier 2 is transmitted to the alpha point; x is x 0 Is a coefficient to be determined, wherein v α1 And v α2 Are all calculated by a second functionAccording to the acquired ground vibration velocity corresponding to the instantaneous velocity at the third position, carrying out regression analysis by taking a least square method as a criterion to obtain a regression equation, and determining x in the above formula 0 2.475, namely:
according to the formula, the vibration speed of a preset distance position at any point between two adjacent piers can be calculated, then the ground vibration speed after the damping of any ancient building around a laying line of the straddle type monorail train can be directly obtained by combining with the second function, whether the ground vibration speed has an influence on the structural integrity of the ancient building or not is judged, when the ground vibration speed is greater than the vibration speed threshold value of the ancient building, the influence of the ground vibration speed on the structural integrity of the ancient building is judged, and when the ground vibration speed is less than the vibration speed threshold value of the ancient building, the influence of the ground vibration speed on the structural integrity of the ancient building is judged.
In a specific embodiment of the disclosure, the step S3 may further include a step S31, a step S32, and a step S33.
S31, fourth information is acquired, wherein the fourth information is the distance between the first position and the target;
s32, the first information and the fourth information are sent to the vibration speed attenuation model, and the ground vibration speed of the target corresponding to the first information is obtained;
s33, judging whether the instantaneous speed of the first train passing through the current bridge pier can influence the structure of a building existing at the target position according to the ground vibration speed and the vibration speed threshold value corresponding to the first information at the target position, and calculating the maximum instantaneous speed of the second train passing through the bridge pier.
In a specific embodiment of the disclosure, the step S33 may further include a step S331 and a step S332.
Step S331, obtaining the maximum allowable vibration speed at the first position according to the vibration speed threshold, the fourth information and the second function;
and step S332, obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the maximum allowable vibration speed at the first position and the first function.
In this embodiment, the maximum instantaneous speed of the second train passing through the bridge pier is obtained, and the influence of the running of the straddle-type monorail train on the cultural relics can be reduced by adopting an advanced speed reduction mode.
Example 2
As shown in fig. 2, the present embodiment provides a train speed calculation device, which includes an acquisition module 901, a setup module 902, and a calculation module 903.
The acquiring module 901 is configured to acquire first information, second information and third information, where the first information is an instantaneous speed of the first train passing through the current bridge pier, the second information is a ground vibration speed corresponding to the instantaneous speed at a first position, and the third information is a ground vibration speed corresponding to the instantaneous speed at a second position; the first position and the second position are both arranged on a connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target;
the establishing module 902 is configured to establish a vibration velocity attenuation model according to the first information, the second information, and the third information, where the vibration velocity attenuation model is used to calculate a ground vibration velocity corresponding to the instant velocity conducted to the target;
the calculating module 903 is configured to obtain a maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold and the vibration speed attenuation model.
In a specific embodiment of the disclosure, the establishing module 902 includes a first calculating unit 9021 and a selecting unit 9022.
The first calculating unit 9021 is configured to calculate a goodness of fit of curve fitting of the first information and the second information by using a power function, an S function, a growing function, and an exponential function, respectively;
the selecting unit 9022 is configured to select a curve function with the highest goodness of fit, and perform curve fitting on the first information and the second information to obtain a first function, where the first function is a functional relationship between an instantaneous speed when the first train passes through the current pier and a ground vibration speed corresponding to the instantaneous speed at a first position.
In a specific embodiment of the disclosure, the apparatus further comprises a first determining unit 9023, a first establishing unit 9024 and a second establishing unit 9025.
The first determining unit 9023 is configured to obtain a damping law of a vibration velocity according to an empirical formula of ground vibration damping caused by a vehicle, where the damping law includes a geometric damping law and a damping law;
the first establishing unit 9024 is configured to establish a second function according to the second information, the third information, and the damping rule of the vibration speed, where the second function is a functional relationship between a ground vibration speed corresponding to the instantaneous speed at the first position and a ground vibration speed corresponding to the instantaneous speed at the second position;
the second establishing unit 9025 is configured to establish a vibration velocity damping model according to the first function and the second function.
In a specific embodiment of the disclosure, the first establishing unit 9024 further includes a second determining unit 90241 and a regression unit 90242.
The second determining unit 90241 is configured to obtain, according to the attenuation rule of the ground vibration velocity, a power function relationship between the ground vibration velocity attenuation and the distance;
the regression unit 90242 is configured to perform regression analysis on a power function relationship between the ground vibration velocity attenuation and the distance by using the second information and the third information, so as to obtain a second function.
In a specific embodiment of the disclosure, the calculating module 903 further includes an obtaining unit 9031, a sending unit 9032, and a judging unit 9033.
The acquiring unit 9031 is configured to acquire fourth information, where the fourth information is a distance between the first location and the target;
the sending unit 9032 is configured to send the first information and the fourth information to the vibration velocity attenuation model, so as to obtain a ground vibration velocity corresponding to the first information at the target position;
the judging unit 9033 is configured to judge whether an instantaneous speed of the first train passing through the current bridge pier will affect a structure of a building existing at the target location according to the ground vibration speed corresponding to the first information at the target location and the vibration speed threshold, and calculate a maximum instantaneous speed of the second train passing through the bridge pier.
In a specific embodiment of the disclosure, the determining unit 9033 further includes a second calculating unit 90331 and a third calculating unit 90332.
The second calculating unit 90331 is configured to obtain, according to the vibration speed threshold, the fourth information, and the second function, a maximum allowable vibration speed at the first location;
the third calculating unit 90332 is configured to obtain, according to the maximum allowable vibration speed at the first position and the first function, a maximum instantaneous vehicle speed of the second train passing through the bridge pier.
It should be noted that, regarding the apparatus in the above embodiments, the specific manner in which the respective modules perform the operations has been described in detail in the embodiments regarding the method, and will not be described in detail herein.
Example 3
Corresponding to the above method embodiments, the present disclosure further provides a train speed calculating apparatus, and the train speed calculating apparatus described below and the train speed calculating method described above may be referred to correspondingly to each other.
Fig. 3 is a block diagram of a train speed computing device 800, shown in accordance with an exemplary embodiment. As shown in fig. 3, the train speed calculation device 800 may include: a processor 801, a memory 802. The train speed computing device 800 can also include one or more of a multimedia component 803, an input/output (I/O) interface 804, and a communication component 805.
Wherein the processor 801 is configured to control the overall operation of the train speed calculation device 800 to perform all or part of the steps of the train speed calculation method described above. The memory 802 is used to store various types of data to support operation at the train speed computing device 800, which may include, for example, instructions for any application or method operating on the train speed computing device 800, as well as application related data, such as contact data, messages, pictures, audio, video, and the like. The Memory 802 may be implemented by any type or combination of volatile or non-volatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia component 803 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen, the audio component being for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 802 or transmitted through the communication component 805. The audio assembly further comprises at least one speaker for outputting audio signals. The I/O interface 804 provides an interface between the processor 801 and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the train speed computing device 800 and other devices. Wireless communication, such as Wi-Fi, bluetooth, near field communication (Near FieldCommunication, NFC for short), 2G, 3G or 4G, or a combination of one or more thereof, the respective communication component 805 may thus comprise: wi-Fi module, bluetooth module, NFC module.
In an exemplary embodiment, the train speed calculation device 800 can be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, ASIC), digital signal processor (DigitalSignal Processor, DSP), digital signal processing device (Digital Signal Processing Device, DSPD), programmable logic device (Programmable Logic Device, PLD), field programmable gate array (Field Programmable Gate Array, FPGA), controller, microcontroller, microprocessor, or other electronic element for performing the train speed calculation method described above.
In another exemplary embodiment, a computer readable storage medium is also provided that includes program instructions that, when executed by a processor, implement the steps of the train speed calculation method described above. For example, the computer readable storage medium may be the memory 802 described above including program instructions executable by the processor 801 of the train speed calculation device 800 to perform the train speed calculation method described above.
Corresponding to the above method embodiments, the present disclosure further provides a readable storage medium, and a readable storage medium described below and a train speed calculating method described above may be referred to correspondingly to each other.
Example 4
A readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the train speed calculation method of the above method embodiment.
The readable storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, and the like.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A train speed calculation method, comprising:
acquiring first information, second information and third information, wherein the first information is the instant speed of a first train passing through a current bridge pier, the second information is the ground vibration speed corresponding to the instant speed at a first position, and the third information is the ground vibration speed corresponding to the instant speed at a second position; the first position and the second position are both arranged on a connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target;
establishing a vibration speed attenuation model according to the first information, the second information and the third information, wherein the vibration speed attenuation model is used for calculating the ground vibration speed corresponding to the instant speed conducted to the target;
and obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold and the vibration speed attenuation model.
2. The train speed calculation method according to claim 1, wherein the establishing a vibration speed damping model from the first information, the second information, and the third information includes:
respectively calculating the goodness of fit of the power function, the S function, the growth function and the exponential function to the first information and the second information;
and selecting a curve function with the highest fitting goodness, and performing curve fitting on the first information and the second information to obtain a first function, wherein the first function is a functional relationship between the instantaneous speed of the first train passing through the current bridge pier and the ground vibration speed corresponding to the instantaneous speed at the first position.
3. The method for calculating a train speed according to claim 2, wherein after selecting the curve function with the highest goodness of fit and performing curve fitting on the first information and the second information to obtain a first function, further comprises:
obtaining a damping rule of vibration speed according to an empirical formula of ground vibration damping caused by a vehicle, wherein the damping rule comprises a geometric damping rule and a damping rule;
establishing a second function according to the second information, the third information and the damping rule of the vibration speed, wherein the second function is a functional relation between the ground vibration speed corresponding to the instantaneous speed at the first position and the ground vibration speed corresponding to the instantaneous speed at the second position;
and establishing a vibration speed attenuation model according to the first function and the second function.
4. The train speed calculation method according to claim 3, wherein the establishing a second function according to the second information, the third information and the attenuation law of the ground vibration speed comprises:
obtaining a power function relation between the ground vibration speed attenuation and the distance according to the ground vibration speed attenuation law;
and carrying out regression analysis on the power function relation between the ground vibration velocity attenuation and the distance by using the second information and the third information to obtain a second function.
5. A train speed calculation device, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring first information, second information and third information, the first information is the instant speed of a first train passing through a current bridge pier, the second information is the ground vibration speed corresponding to the instant speed at a first position, and the third information is the ground vibration speed corresponding to the instant speed at a second position; the first position and the second position are both arranged on a connecting line of the bridge pier and the target, the shortest distance between the first position and the bridge pier is a preset distance, and the second position is arranged between the first position and the target;
the establishing module is used for establishing a vibration speed attenuation model according to the first information, the second information and the third information, and the vibration speed attenuation model is used for calculating the ground vibration speed corresponding to the instant speed conducted to the target;
and the calculation module is used for obtaining the maximum instantaneous speed of the second train passing through the bridge pier according to the vibration speed threshold value and the vibration speed attenuation model.
6. The train speed calculation device of claim 5, wherein the establishing module comprises:
the first calculation unit is used for calculating the goodness of fit of the power function, the S function, the growth function and the exponential function to the first information and the second information;
and the selecting unit is used for selecting the curve function with the highest fitting goodness to perform curve fitting on the first information and the second information to obtain a first function, wherein the first function is a functional relation between the instantaneous speed of the first train passing through the current bridge pier and the ground vibration speed corresponding to the instantaneous speed at the first position.
7. The train speed calculation device according to claim 6, further comprising:
the first determining unit is used for obtaining a damping rule of the vibration speed according to an empirical formula of ground vibration damping caused by the vehicle, wherein the damping rule comprises a geometric damping rule and a damping rule;
the first establishing unit is used for establishing a second function according to the second information, the third information and the damping rule of the vibration speed, wherein the second function is a functional relation between the ground vibration speed corresponding to the instantaneous speed at the first position and the ground vibration speed corresponding to the instantaneous speed at the second position;
and the second establishing unit is used for establishing a vibration speed attenuation model according to the first function and the second function.
8. The train speed calculation device according to claim 7, wherein the first establishing unit includes:
the second determining unit is used for obtaining a power function relation between the ground vibration speed attenuation and the distance according to the attenuation rule of the ground vibration speed;
and the regression unit is used for carrying out regression analysis on the power function relation between the ground vibration speed attenuation and the distance by utilizing the second information and the third information to obtain a second function.
9. A train speed calculation device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the train speed calculation method according to any one of claims 1 to 4 when executing the computer program.
10. A readable storage medium, characterized by: the readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the train speed calculation method according to any one of claims 1 to 4.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117708470A (en) * | 2024-02-06 | 2024-03-15 | 西南交通大学 | Method for converting damping vibration function of vibration load of railway vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117708470A (en) * | 2024-02-06 | 2024-03-15 | 西南交通大学 | Method for converting damping vibration function of vibration load of railway vehicle |
| CN117708470B (en) * | 2024-02-06 | 2024-04-30 | 西南交通大学 | Method for converting damping vibration function of vibration load of railway vehicle |
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