CN103440369A - Optimization method and device for pulse seismic source - Google Patents
Optimization method and device for pulse seismic source Download PDFInfo
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- CN103440369A CN103440369A CN2013103547237A CN201310354723A CN103440369A CN 103440369 A CN103440369 A CN 103440369A CN 2013103547237 A CN2013103547237 A CN 2013103547237A CN 201310354723 A CN201310354723 A CN 201310354723A CN 103440369 A CN103440369 A CN 103440369A
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Abstract
The embodiment of the invention provides an optimization method and an optimization device for a pulse seismic source. The pulse seismic source comprises a frame, a counter weight, a flat plate and a pressure weight. The method comprises the following steps: analyzing a pulse seismic source flat plate impact process by using a previously established flat plate-earth finite element model to obtain the deformation condition of the flat plate, and/or the acceleration variation condition and/or the impact stress wave transfer condition; determining a rule of stress wave produced by the flat plate under impact according to the deformation condition of the flat plate, and/or the acceleration variation condition and/or the impact stress wave transfer condition; optimizing the pulse seismic source based on the rule of the stress wave produced by the flat plate under impact. According to the method and the device, the analysis cost can be reduced and the analysis efficiency can be improved, so that the optimization design development cost of the pulse seismic source is reduced and the development period is shortened.
Description
Technical field
The present invention relates to the Pulse Source field, particularly a kind of optimization method of Pulse Source and device.
Background technology
Pulse Source is a kind of excitation energy source for little refraction process, mini-log, vertical seismic profile (VSP) (VSP, Vertical Seismic Profiling) and shallow layer exploration etc.Its principle of work is: utilize weight to accelerate lower drop impact flat board, thereby produce the shock wave that can be used as exploring use, and import stratum into via flat board, by analyzing the communication process of this shock wave in stratum, obtain the relevant information of survey area stratal configuration, and then have mineral wealth to make according to a preliminary estimate to this zone possibility.
For the pulse signal source for seismic prospecting, its basic fundamental requirement is: 1) have enough signal energies; 2) in order to guarantee that signal has high-resolution, should make signal pulse there is the narrow as far as possible duration; 3) the clear-cut signal first arrival of take-off; 4) reproducible and stable signal waveform form; 5) low noise that signal excitation source the machine has (as ground unrests such as machine shakes, weight bounce-backs) characteristic.Flat board is the critical piece of Pulse Source, is the source that shock wave produces, and is also that energy imports the crucial executive component of the earth into the most at last.For example, due to dull and stereotyped own characteristic (structure, the difference of material etc.) form, frequency range and the amplitude of meeting paired pulses stress wave have very large impact, therefore, analyzing the optimal design exploitation that different plate materials and structure hit the formation of ripple and propagate correlation parameter paired pulses focus in different impact condition undershoots has great importance.
At present, the analysis of paired pulses focus plate impact process mainly contains two kinds of methods: analytical technique and test analysis mathed.Wherein, because Pulse Source plate impact process is very complicated, this impact process is carried out to analytical analysis and be difficult to realize, and very complicated; The test analysis mathed precision is higher, but its shortcoming higher and complicated operation that is expense, generally only before the optimal design typing is come into operation, with this test analysis mathed, carries out last intensity and verifies, it is unsuitable for adopting in process of optimization.
Introduction to technical background above should be noted that is just carried out clear, complete explanation for convenient to technical scheme of the present invention, and facilitates those skilled in the art's understanding to set forth.Can not only because of these schemes, in background technology of the present invention, partly carry out setting forth and thinking that technique scheme is conventionally known to one of skill in the art.
Summary of the invention
The object of the present invention is to provide a kind of optimization method and device of Pulse Source, can reduce analysis cost, improve analysis efficiency, thereby can reduce the optimal design cost of development of Pulse Source and shorten the construction cycle.
According to an aspect of the present invention, provide a kind of optimization method of Pulse Source, described Pulse Source comprises framework, weight, flat board and ballast; Wherein, described method comprises: the flat board that utilization is set up in advance-the earth finite element model paired pulses focus plate impact process is analyzed, and to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple, transmits situation; Deformation based on dull and stereotyped and/or acceleration change situation and/or shock stress ripple transmit situation, determine the be hit rule of produced stress wave of flat board; Based on the be hit rule of produced stress wave of flat board, the paired pulses focus is optimized.
According to another aspect of the present invention, provide a kind of optimization device of Pulse Source, described Pulse Source comprises framework, weight, flat board and ballast; Wherein, described device comprises: analysis module, the flat board that described analytic unit is set up in advance for utilization-the earth finite element model paired pulses focus plate impact process is analyzed, and to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple, transmits situation; And the deformation based on dull and stereotyped and/or acceleration change situation and/or shock stress ripple transmit situation, determine the be hit rule of produced stress wave of flat board; Optimize module, described optimization unit is for the rule of the produced stress wave that is hit based on flat board, and the paired pulses focus is optimized.
Beneficial effect of the present invention is: reduced analysis cost and improved analysis efficiency, thereby can reduce the optimal design cost of development of Pulse Source and shorten the construction cycle.
Explanation and accompanying drawing with reference to hereinafter, disclose specific implementations of the present invention in detail, and having indicated principle of the present invention can adopted mode.Should be appreciated that, embodiments of the present invention on scope not thereby be restricted.In the scope of the spirit of claims and clause, embodiments of the present invention comprise many changes, revise and are equal to.
The feature of describing and/or illustrating for a kind of embodiment can be used in same or similar mode in one or more other embodiment, combined with the feature in other embodiment, or substitutes the feature in other embodiment.
Should emphasize, term " comprises/comprises " existence that refers to feature, whole, step or assembly when this paper is used, but does not get rid of the existence of one or more further feature, whole, step or assembly or additional.
The accompanying drawing explanation
With reference to following accompanying drawing a lot of aspects that the present invention may be better understood.Parts in accompanying drawing are not proportional draftings, and just for principle of the present invention is shown.For the ease of illustrating and describe some parts of the present invention, in accompanying drawing, corresponding part may be exaggerated or dwindle.The element of describing in an accompanying drawing of the present invention or a kind of embodiment and feature can combine with element and feature shown in one or more other accompanying drawing or embodiment.In addition, in the accompanying drawings, similarly label means parts corresponding in several accompanying drawings, and can be used for indication more than the corresponding component used in a kind of embodiment.
In the accompanying drawings:
Fig. 1 is the structural representation of the Pulse Source of the embodiment of the present invention 1;
Fig. 2 is the process flow diagram of optimization method of the Pulse Source of the embodiment of the present invention 1;
Fig. 3 is the process flow diagram of method of the foundation flat board-the earth finite element model of the embodiment of the present invention 1;
Fig. 4 is the structural representation of optimization device of the Pulse Source of the embodiment of the present invention 2;
Fig. 5 is the structural representation of the MBM of the embodiment of the present invention 2.
Embodiment
Below in conjunction with accompanying drawing, various embodiments of the present invention are described.These embodiments are exemplary, are not limitations of the present invention.
Embodiment 1
Fig. 1 is the structural representation of the Pulse Source of the embodiment of the present invention 1.As shown in Figure 1, this Pulse Source comprises: framework 101, weight 102, flat board 103 and ballast 104,105 mean the earth.Wherein, weight 102 is fixed on framework 101, and can free-falling, to dull and stereotyped 103, is impacted; Dull and stereotyped 103 contact with the earth 105, and after flat board 103 is subject to the impact of weight 102, dull and stereotyped 104 produce shock waves also passes the stratum to the earth 105 by shock wave.
Fig. 2 is the process flow diagram of optimization method of the Pulse Source of the embodiment of the present invention 1.As shown in Figure 2, the method comprises:
Step 201: the flat board that utilization is set up in advance-the earth finite element model paired pulses focus plate impact process is analyzed, and to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple, transmits situation;
Step 202: the deformation based on dull and stereotyped and/or acceleration change situation and/or shock stress ripple transmit situation, determine the be hit rule of produced stress wave of flat board;
Step 203: based on the be hit rule of produced stress wave of flat board, the paired pulses focus is optimized.
From above-described embodiment, by analyze Pulse Source plate impact process based on flat board-the earth finite element model, thereby determine flat board be hit produced stress wave rule also on this basis the paired pulses focus be optimized, can reduce analysis cost, improve analysis efficiency, thereby can reduce the optimal design cost of development of Pulse Source and shorten the construction cycle.
In the present embodiment, the method can also comprise:
Step 204: set up flat board-the earth finite element model.
Wherein, this step is optional step, in Fig. 2, dots.
In the present embodiment, can use any method of prior art to set up flat board-the earth finite element model.Fig. 3 is the process flow diagram of the foundation flat board-the earth finite element model method of the present embodiment, but the invention is not restricted to this method.
As shown in Figure 3, the method for setting up flat board-the earth finite element model comprises:
Step 301: utilize the three-dimensional geometry solid model to set up the finite element model of Pulse Source impact process;
Step 302: utilize explicit Nonlinear Dynamics to set up the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth;
Step 303: the finite element model based on described Pulse Source impact process, described the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth, set up flat board-the earth finite element model.
In the step 301 of the present embodiment, the finite element model of this Pulse Source impact process for example can comprise the finite element model of framework, weight, flat board and the earth, but the invention is not restricted to this kind of situation.
In the step 302 of the present embodiment, utilize explicit Nonlinear Dynamics to set up the earth vibration finite element model, weight and dull and stereotyped contact interface and the contact interface of flat board and the earth, wherein, can use any method in existing explicit Nonlinear Dynamics to set up finite element model and contact interface.For example, can utilize Drucker-pula lattice (Drucker-Prager) model to set up the earth vibration finite element model, utilize penalty function method to set up weight and dull and stereotyped contact interface, and utilize spring-dampers that the dull and stereotyped contact interface with the earth is made as to viscous boundary.But the invention is not restricted to these methods.
In the step 303 of the present embodiment, when setting up flat board-the earth finite element model, the impact of weight can be reduced to the load with ballistic work and normal pressure and input the finite element model of this Pulse Source impact process, and, the ballast of this Pulse Source is reduced to the constraint of a power and a five degree of freedom and inputs the finite element model of this Pulse Source impact process, wherein, the size of described power equates with the gravity of described ballast.
Like this, by the ballast of the impact by weight and Pulse Source, simplified, further simplified model, thus improve analysis efficiency.
In the step 201 of the present embodiment, analyze Pulse Source plate impact process according to this flat board-the earth finite element model, wherein, the purpose that paired pulses focus plate impact process is analyzed is to analyze the correlation parameter that different dull and stereotyped parameters forms shock wave and propagates shock wave under different impact conditions, therefore, for example can carry out at least one in following three kinds of analytical approachs, but the invention is not restricted to these analytical approachs and content:
According to the difference of described tension weight churning merit, analyze dull and stereotyped deformation and/or dull and stereotyped acceleration change curve and/or dull and stereotyped shock stress ripple transfer curve; For example, can, in the situation that the ballistic work of weight is respectively 30,000 joules, 40,000 joules and 50,000 joules, analyze respectively dull and stereotyped deformation, acceleration change curve and shock stress ripple transfer curve;
Under the maximum impact merit of weight, according to the difference of ballast weight, analyze dull and stereotyped accelerating curve and/or dull and stereotyped shock stress ripple transfer curve; For example, the maximum impact merit of weight is 50,000 joules, now, ballast be respectively maximum impact force 120%, 100% and 80% the time, analyze respectively dull and stereotyped deformation, acceleration change curve and shock stress ripple transfer curve;
According to the difference of dull and stereotyped material and/or shape and/or size, analyze dull and stereotyped deformation and/or dull and stereotyped acceleration change curve and/or dull and stereotyped shock stress ripple transfer curve; For example, when dull and stereotyped material is respectively 45 steel, high-strength aluminum alloy, high strength copper alloy, analyze dull and stereotyped deformation, acceleration change curve and shock stress ripple transfer curve; Again for example, during circular, square and taper type, analyze dull and stereotyped deformation, acceleration change curve and shock stress ripple transfer curve being shaped as of flat board; Again for example, at dull and stereotyped base area, be 0.36m
2and 1.44m
2the time, analyze dull and stereotyped deformation, acceleration change curve and shock stress ripple transfer curve.
Like this, by above analysis, can obtain the correlation parameter that different dull and stereotyped parameters forms shock wave and propagates shock wave under different impact conditions, thereby determine the be hit rule of produced stress wave of flat board, determine dull and stereotyped optimization direction also on this basis the paired pulses focus be optimized.
From above-described embodiment, by analyze Pulse Source plate impact process based on flat board-the earth finite element model, thereby determine flat board be hit produced stress wave rule also on this basis the paired pulses focus be optimized, can reduce analysis cost, improve analysis efficiency, thereby can reduce the optimal design cost of development of Pulse Source and shorten the construction cycle.Further, by the ballast of the impact by weight and Pulse Source, simplified, further simplified model, thus improve analysis efficiency.
Embodiment 2
Fig. 4 is the structural representation of optimization device 400 of the Pulse Source of the embodiment of the present invention 2, corresponding to the optimization method of the Pulse Source of embodiment 1.As shown in Figure 4, this device 400 comprises analysis module 401 and optimizes module 402.Wherein,
The flat board that analysis module 401 is set up in advance for utilization-the earth finite element model paired pulses focus plate impact process is analyzed, and to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple, transmits situation; And the deformation based on dull and stereotyped and/or acceleration change situation and/or shock stress ripple transmit situation, determine the be hit rule of produced stress wave of flat board;
Optimize the rule of module 402 for the produced stress wave that is hit based on flat board, the paired pulses focus is optimized.
From above-described embodiment, by analyze Pulse Source plate impact process based on flat board-the earth finite element model, thereby determine flat board be hit produced stress wave rule also on this basis the paired pulses focus be optimized, can reduce analysis cost, improve analysis efficiency, thereby can reduce the optimal design cost of development of Pulse Source and shorten the construction cycle.
In the present embodiment, this device can also comprise:
MBM 403, for setting up flat board-the earth finite element model.
Wherein, these parts are selectable unit (SU), in Fig. 4, dot.
In the present embodiment, can use any method of prior art to set up flat board-the earth finite element model.Fig. 5 is the structural representation of the MBM of the present embodiment, but the invention is not restricted to this structure.As shown in Figure 5, this MBM 403 comprises: the first modeling unit 501, the second modeling unit 502 and the 3rd modeling unit 503.Wherein,
The first modeling unit 501 is for utilizing the three-dimensional geometry solid model to set up the finite element model of Pulse Source impact process;
The second modeling unit 502 is for utilizing explicit Nonlinear Dynamics to set up the earth vibration finite element model, weight and dull and stereotyped contact interface and the contact interface of flat board and the earth;
The 3rd modeling unit 503, for the finite element model based on this Pulse Source impact process, this earth vibration finite element model, weight and dull and stereotyped contact interface and the contact interface of flat board and the earth, is set up flat board-the earth finite element model.
In the present embodiment, the method of the contact interface of finite element model, the earth vibration finite element model, weight of setting up the Pulse Source impact process and dull and stereotyped contact interface and dull and stereotyped and the earth, set up the method, identical with the record in embodiment 1 according to the method for this flat board-the earth finite element model analysis Pulse Source plate impact process of flat board-the earth finite element model, no longer repetition herein.
From above-described embodiment, by analyze Pulse Source plate impact process based on flat board-the earth finite element model, thereby determine flat board be hit produced stress wave rule also on this basis the paired pulses focus be optimized, can reduce analysis cost, improve analysis efficiency, thereby can reduce the optimal design cost of development of Pulse Source and shorten the construction cycle.Further, by the ballast of the impact by weight and Pulse Source, simplified, further simplified model, thus improve analysis efficiency.
The above apparatus and method of the present invention can be realized by hardware, also can be realized by combination of hardware software.The present invention relates to such computer-readable program, when this program is performed by logical block, can make this logical block realize the device or the component parts that above are somebody's turn to do, or make this logical block realize the whole bag of tricks or the step of above being somebody's turn to do.
The invention still further relates to for storing the storage medium of above program, as hard disk, disk, CD, DVD, flash storer etc.
Invention has been described for the concrete embodiment of above combination, but it will be apparent to those skilled in the art that these descriptions are all exemplary, is not limiting the scope of the invention.Those skilled in the art can make various variants and modifications to the present invention according to spirit of the present invention and principle, and these variants and modifications also within the scope of the invention.
Claims (10)
1. the optimization method of a Pulse Source, described Pulse Source comprises framework, weight, flat board and ballast; Wherein, described method comprises:
The flat board that utilization is set up in advance-the earth finite element model paired pulses focus plate impact process is analyzed, and to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple, transmits situation;
Deformation based on dull and stereotyped and/or acceleration change situation and/or shock stress ripple transmit situation, determine the be hit rule of produced stress wave of flat board;
Based on the be hit rule of produced stress wave of flat board, the paired pulses focus is optimized.
2. method according to claim 1, wherein, described method also comprises: set up flat board-the earth finite element model;
Described foundation flat board-the earth finite element model comprises:
Utilize the three-dimensional geometry solid model to set up the finite element model of Pulse Source impact process;
Utilize explicit Nonlinear Dynamics to set up the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth;
Finite element model based on described Pulse Source impact process, described the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth, set up flat board-the earth finite element model.
3. method according to claim 2, wherein, the finite element model of described Pulse Source impact process comprises the finite element model of described framework, weight, dull and stereotyped and described the earth.
4. method according to claim 2, wherein, describedly utilize explicit Nonlinear Dynamics to set up the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth to comprise:
Utilize Drucker-pula lattice (Drucker-Prager) model to set up described the earth vibration finite element model, utilize penalty function method to set up the contact interface of described weight and described flat board, and utilize spring-dampers that the contact interface of described flat board and the earth is made as to viscous boundary.
5. method according to claim 2, wherein, described finite element model based on described Pulse Source impact process, described the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth, set up flat board-the earth finite element model and comprise:
Finite element model based on described Pulse Source impact process, described the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth, the impact of described weight is reduced to the load with ballistic work and normal pressure and inputs the finite element model of described Pulse Source impact process, and, the ballast of described Pulse Source is reduced to the constraint of a power and a five degree of freedom and inputs the finite element model of described Pulse Source impact process, wherein, the size of described power equates with the gravity of described ballast.
6. according to the described method of any one of claim 1-5, wherein, utilize the flat board set up in advance-the earth finite element model paired pulses focus plate impact process to be analyzed, to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple transmission situation comprises at least one in following situation:
According to the difference of described tension weight churning merit, analyze deformation and/or the acceleration change curve of described flat board and/or the shock stress ripple transfer curve of described flat board of described flat board;
Under the maximum impact merit of described weight, according to the difference of described ballast weight, analyze the accelerating curve of described flat board and/or the shock stress ripple transfer curve of described flat board;
According to the material of described flat board and/or the difference of shape and/or size, analyze deformation and/or the acceleration change curve of described flat board and/or the shock stress ripple transfer curve of described flat board of described flat board.
7. the optimization device of a Pulse Source, described Pulse Source comprises framework, weight, flat board and ballast; Wherein, described device comprises:
Analysis module, the flat board that described analytic unit is set up in advance for utilization-the earth finite element model paired pulses focus plate impact process is analyzed, and to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple, transmits situation; And the deformation based on dull and stereotyped and/or acceleration change situation and/or shock stress ripple transmit situation, determine the be hit rule of produced stress wave of flat board;
Optimize module, described optimization unit is for the rule of the produced stress wave that is hit based on flat board, and the paired pulses focus is optimized.
8. device according to claim 7, wherein, described device also comprises:
MBM, described MBM is for setting up flat board-the earth finite element model;
Described MBM comprises:
The first modeling unit, described the first modeling unit is for utilizing the three-dimensional geometry solid model to set up the finite element model of Pulse Source impact process;
The second modeling unit, described the second modeling unit is for utilizing explicit Nonlinear Dynamics to set up the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth;
The 3rd modeling unit, described the 3rd modeling unit, for finite element model based on described Pulse Source impact process, described the earth vibration finite element model, described weight and dull and stereotyped contact interface and the contact interface of described flat board and the earth, is set up flat board-the earth finite element model.
9. device according to claim 8, wherein, described the 3rd modeling unit is for the finite element model based on described Pulse Source impact process, described the earth vibration finite element model, described weight and dull and stereotyped contact interface, and the contact interface of described flat board and the earth, the impact of described weight is reduced to the load with ballistic work and normal pressure and inputs the finite element model of described Pulse Source impact process, and, the ballast of described Pulse Source is reduced to the constraint of a power and a five degree of freedom and inputs the finite element model of described Pulse Source impact process, wherein, the size of described power equates with the gravity of described ballast.
10. according to the described device of any one of claim 7-9, wherein, the flat board that described analysis module utilization is set up in advance-the earth finite element model paired pulses focus plate impact process is analyzed, to obtain dull and stereotyped deformation and/or acceleration change situation and/or shock stress ripple transmission situation comprises at least one in following situation:
According to the difference of described tension weight churning merit, analyze deformation and/or the acceleration change curve of described flat board and/or the shock stress ripple transfer curve of described flat board of described flat board;
Under the maximum impact merit of described weight, according to the difference of described ballast weight, analyze the accelerating curve of described flat board and/or the shock stress ripple transfer curve of described flat board;
According to the material of described flat board and/or the difference of shape and/or size, analyze deformation and/or the acceleration change curve of described flat board and/or the shock stress ripple transfer curve of described flat board of described flat board.
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| CN110244355A (en) * | 2019-07-25 | 2019-09-17 | 西南交通大学 | A kind of pulse earthquake motion analogy method based on focal fault model |
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| US20080106401A1 (en) * | 2006-11-07 | 2008-05-08 | Harris Corporation | Systems and methods for power efficient situation aware seismic detection and classification |
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| CN110244355A (en) * | 2019-07-25 | 2019-09-17 | 西南交通大学 | A kind of pulse earthquake motion analogy method based on focal fault model |
| CN110244355B (en) * | 2019-07-25 | 2021-06-08 | 西南交通大学 | Pulse earthquake motion simulation method based on earthquake source fault model |
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