CN103440369B - The optimization method of Pulse Source and device - Google Patents
The optimization method of Pulse Source and device Download PDFInfo
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Abstract
The embodiment of the present invention provides optimization method and the device of a kind of Pulse Source, and described Pulse Source includes framework, weight, flat board and ballast；Wherein, described method includes: utilize flat board-the earth FEM (finite element) model of pre-building that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；Based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；Be hit the rule of produced stress wave based on flat board, and Pulse Source is optimized.According to the method and device, it is possible to reduce analysis cost, improve analysis efficiency, thus the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.
Description
Technical field
The present invention relates to Pulse Source field, particularly to optimization method and the device of a kind of Pulse Source.
Background technology
Pulse Source is a kind of excitation energy source for little refraction method, mini-log, VSP (VSP, VerticalSeismicProfiling) and shallow layer exploration etc..Its operation principle is: utilize weight to accelerate falling impacts flat board, thus producing can be used as the shock wave of exploration, and via the incoming stratum of flat board, by analyzing this shock wave communication process in the earth formation, obtain the relevant information of survey area earth formation, and then whether this region is likely to have mineral resources to make according to a preliminary estimate.
For the pulse signal source for seismic prospecting, its main technique requirements is: 1) have enough signal energies；2) in order to ensure that signal has high-resolution, signal pulse should be made to have the persistent period narrow as far as possible；3) the signal first arrival that take-off is clear-cut；4) reproducible and stable signal waveform form；5) signal excitation source the machine has low noise (as machine shake, the background noise such as weight bounce-back) characteristic.Flat board is the critical piece of Pulse Source, is the source of shock wave generation, is also the crucial executive component of the incoming the earth of energy the most at last.Own characteristic (such as structure due to flat board, the difference of material etc.) form of pulse stress ripple, frequency range and amplitude can there be is very big impact, therefore, analyze different plate materials and structure hit the formation of ripple in different impact condition undershoots and propagate relevant parameter and the optimization of Pulse Source designed and developed have great importance.
At present, the analysis of Pulse Source plate impact process mainly there are two kinds of methods: analytical technique and test analysis mathed.Wherein, owing to Pulse Source plate impact process is sufficiently complex, this impact process is carried out analytical analysis and is difficulty with, and extremely complex；Test analysis mathed precision is higher, but its shortcoming is costly and complicated operation, normally only carries out last strength modification with this test analysis mathed before optimizing design typification and coming into operation, and it is unsuitable in process of optimization to adopt.
It should be noted that above the introduction of technical background to be intended merely to and conveniently technical scheme is carried out clear, complete explanation, and facilitate the understanding of those skilled in the art to set forth.Can not merely because these schemes be set forth at the background section of the present invention and think that technique scheme is conventionally known to one of skill in the art.
Summary of the invention
It is an object of the invention to provide the optimization method of a kind of Pulse Source and device, it is possible to reduce analysis cost, improve analysis efficiency such that it is able to the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.
According to an aspect of the present invention, it is provided that the optimization method of a kind of Pulse Source, described Pulse Source includes framework, weight, flat board and ballast；Wherein, described method includes: utilize flat board-the earth FEM (finite element) model of pre-building that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；Based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；Be hit the rule of produced stress wave based on flat board, and Pulse Source is optimized.
According to another aspect of the present invention, it is provided that the optimization device of a kind of Pulse Source, described Pulse Source includes framework, weight, flat board and ballast；Wherein, described device includes: analysis module, described analytic unit is for utilizing the flat board pre-build-the earth FEM (finite element) model that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；Further, based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；Optimizing module, Pulse Source, for the rule of the produced stress wave that is hit based on flat board, is optimized by described optimization unit.
The beneficial effects of the present invention is: reduce analysis cost and improve analysis efficiency such that it is able to the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.
With reference to explanation hereinafter and accompanying drawing, disclose in detail only certain exemplary embodiments of this invention, specifying principles of the invention can adopted mode.It should be understood that embodiments of the present invention are not so limited in scope.In the spirit of claims and the scope of clause, embodiments of the present invention include many changes, amendment and are equal to.
The feature described for a kind of embodiment and/or illustrate can use in one or more other embodiment in same or similar mode, combined with the feature in other embodiment, or substitutes the feature in other embodiment.
It should be emphasized that term " include/comprise " refers to the existence of feature, one integral piece, step or assembly herein when using, but it is not precluded from the existence of one or more further feature, one integral piece, step or assembly or additional.
Accompanying drawing explanation
A lot of aspects of the present invention can be more fully understood that with reference to following accompanying drawing.Parts in accompanying drawing are not proportional draftings, and are intended merely to and illustrate principles of the invention.For the ease of illustrating and describe the some parts of the present invention, in accompanying drawing, corresponding part is likely to be exaggerated or minimized.Can combine with the element shown in one or more other accompanying drawing or embodiment and feature at the element described in the accompanying drawing of the present invention or a kind of embodiment and feature.Additionally, in the accompanying drawings, similar label represents parts corresponding in several accompanying drawing, and can be used for indicating the corresponding component used in more than one 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 flow chart of the optimization method of the Pulse Source of the embodiment of the present invention 1；
Fig. 3 is the flow chart of the method setting up flat board-the earth FEM (finite element) model of the embodiment of the present invention 1；
Fig. 4 is the structural representation optimizing 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.
Detailed description of the invention
Below in conjunction with accompanying drawing, the various embodiments of the present invention are illustrated.These embodiments are illustrative of, and 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 it is shown in figure 1, this Pulse Source includes: framework 101, weight 102, flat board 103 and ballast 104,105 represent the earth.Wherein, weight 102 is fixed on framework 101, and can free-falling, flat board 103 is impacted；Flat board 103 contacts with the earth 105, and after flat board 103 is subject to the impact of weight 102, flat board 104 produces shock wave and shock wave is transmitted to the stratum of the earth 105.
Fig. 2 is the flow chart of the optimization method of the Pulse Source of the embodiment of the present invention 1.As in figure 2 it is shown, the method includes:
Step 201: utilize flat board-the earth FEM (finite element) model of pre-building that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；
Step 202: based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；
Step 203: the rule of the produced stress wave that is hit based on flat board, is optimized Pulse Source.
From above-described embodiment, by based on flat board-the earth finite element model analysis Pulse Source plate impact process, the rule of produced stress wave on this basis Pulse Source being optimized so that it is determined that flat board is hit, analysis cost can be reduced, improve analysis efficiency such that it is able to the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.
In the present embodiment, the method can also include:
Step 204: set up flat board-the earth FEM (finite element) model.
Wherein, this step is optional step, is represented by dashed line in fig. 2.
In the present embodiment, it is possible to use any one method of prior art sets up flat board-the earth FEM (finite element) model.Fig. 3 is the flow chart setting up flat board-the earth FEM (finite element) model method of the present embodiment, but the invention is not restricted to this method.
As it is shown on figure 3, the method setting up flat board-the earth FEM (finite element) model includes:
Step 301: utilize three-dimensional geometry physical model to set up the FEM (finite element) model of Pulse Source impact process；
Step 302: utilize explicit non-linear dynamic method to set up the earth and vibrate the contact interface of FEM (finite element) model, the described weight contact interface with flat board and described flat board and the earth；
Step 303: vibrate the contact interface of FEM (finite element) model, described weight and flat board and the contact interface of described flat board and the earth based on the FEM (finite element) model of described Pulse Source impact process, described the earth, set up flat board-the earth FEM (finite element) model.
In the step 301 of the present embodiment, the FEM (finite element) model of this Pulse Source impact process such as can include the FEM (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 non-linear dynamic method to set up the earth and vibrate the contact interface of FEM (finite element) model, weight and flat board and the contact interface of flat board and the earth, wherein, any one method in existing explicit non-linear dynamic method can be used to set up FEM (finite element) model and contact interface.Such as, available Drucker-pula lattice (Drucker-Prager) model is set up the earth and is vibrated FEM (finite element) model, utilize penalty function method to set up the contact interface of weight and flat board, and utilize spring-dampers that the contact interface of flat board with the earth is set 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 FEM (finite element) model, the impact of weight can be reduced to the load with ballistic work and normal pressure and input the FEM (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 FEM (finite element) model of this Pulse Source impact process, wherein, the size of described power is equal with the gravity of described ballast.
So, by the impact of weight and the ballast of Pulse Source are simplified, it is possible to simplified model further, thus improving analysis efficiency.
In the step 201 of the present embodiment, according to this flat board-the earth finite element model analysis Pulse Source plate impact process, wherein, the purpose that Pulse Source plate impact process is analyzed is to analyze different flat board parameters form shock wave when different impacts and propagate the relevant parameter of shock wave, therefore, such as can carry out at least one in following three kinds of analysis methods, but the invention is not restricted to these analysis method and contents:
Difference according to described tension weight churning merit, analyzes the deformation of flat board and/or the Shock stress Wave transfer curve of the acceleration change curve of flat board and/or flat board；For example, it is possible to when the ballistic work respectively 30,000 joules, 40,000 joules and 50,000 joules of weight, analyze the deformation of flat board, acceleration change curve and Shock stress Wave transfer curve respectively；
Under the maximum impact merit of weight, the difference according to ballast weight, analyze the accelerating curve of flat board and/or the Shock stress Wave transfer curve of flat board；Such as, the maximum impact merit of weight is 50,000 joules, now, when 120%, 100% and the 80% of ballast respectively maximum impact force, analyzes the deformation of flat board, acceleration change curve and Shock stress Wave transfer curve respectively；
Material according to flat board and/or the difference of shape and/or size, analyze the deformation of flat board and/or the Shock stress Wave transfer curve of the acceleration change curve of flat board and/or flat board；Such as, when material respectively 45 steel of flat board, high-strength aluminum alloy, high strength copper alloy, analyze the deformation of flat board, acceleration change curve and Shock stress Wave transfer curve；Again such as, when the generally circular in shape, square of flat board and taper type, analyze the deformation of flat board, acceleration change curve and Shock stress Wave transfer curve；Again such as, it is 0.36m at the base area of flat board2And 1.44m2Time, analyze the deformation of flat board, acceleration change curve and Shock stress Wave transfer curve.
So, by above analysis, it is obtained in that different flat board parameters forms shock wave and propagates the relevant parameter of shock wave when different impacts, the rule of produced stress wave so that it is determined that flat board is hit, it is determined that Pulse Source is also optimized by the optimization direction of flat board on this basis.
From above-described embodiment, by based on flat board-the earth finite element model analysis Pulse Source plate impact process, the rule of produced stress wave on this basis Pulse Source being optimized so that it is determined that flat board is hit, analysis cost can be reduced, improve analysis efficiency such that it is able to the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.Further, by the impact of weight and the ballast of Pulse Source are simplified, it is possible to simplified model further, thus improving analysis efficiency.
Embodiment 2
Fig. 4 is the structural representation optimizing 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 includes analysis module 401 and optimizes module 402.Wherein,
Analysis module 401 is for utilizing the flat board pre-build-the earth FEM (finite element) model that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；Further, based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；
Optimize the module 402 rule for the produced stress wave that is hit based on flat board, Pulse Source is optimized.
From above-described embodiment, by based on flat board-the earth finite element model analysis Pulse Source plate impact process, the rule of produced stress wave on this basis Pulse Source being optimized so that it is determined that flat board is hit, analysis cost can be reduced, improve analysis efficiency such that it is able to the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.
In the present embodiment, this device can also include:
MBM 403, is used for setting up flat board-the earth FEM (finite element) model.
Wherein, these parts are selectable unit (SU), are represented by dashed line in the diagram.
In the present embodiment, it is possible to use any one method of prior art sets up flat board-the earth FEM (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 it is shown in figure 5, this MBM 403 includes: the first modeling unit the 501, second modeling unit 502 and the 3rd modeling unit 503.Wherein,
First modeling unit 501 sets up the FEM (finite element) model of Pulse Source impact process for utilizing three-dimensional geometry physical model；
Second modeling unit 502 vibrates the contact interface of FEM (finite element) model, weight and flat board and the contact interface of flat board and the earth for utilizing explicit non-linear dynamic method to set up the earth；
3rd modeling unit 503, for vibrating the contact interface of FEM (finite element) model, weight and flat board and the contact interface of flat board and the earth based on the FEM (finite element) model of this Pulse Source impact process, this earth, sets up flat board-the earth FEM (finite element) model.
In the present embodiment, set up the FEM (finite element) model of Pulse Source impact process, the earth vibrates FEM (finite element) model, weight and the contact interface of flat board and flat board and the method for contact interface greatly, set up the method for flat board-the earth FEM (finite element) model, identical according to the record in the method for this flat board-the earth finite element model analysis Pulse Source plate impact process and embodiment 1, be not repeated herein.
From above-described embodiment, by based on flat board-the earth finite element model analysis Pulse Source plate impact process, the rule of produced stress wave on this basis Pulse Source being optimized so that it is determined that flat board is hit, analysis cost can be reduced, improve analysis efficiency such that it is able to the optimization reducing Pulse Source is designed and developed cost and shortens the construction cycle.Further, by the impact of weight and the ballast of Pulse Source are simplified, it is possible to simplified model further, thus improving analysis efficiency.
The apparatus and method more than present invention can be realized by hardware, it is also possible to is realized by combination of hardware software.The present invention relates to such computer-readable program, when this program is performed by logical block, it is possible to make this logical block realize device or the component parts being somebody's turn to do above, or make this logical block realize various methods or the step being somebody's turn to do above.
The invention still further relates to the storage medium for storing procedure above, such as hard disk, disk, CD, DVD, flash memory etc..
Above in association with specific embodiment, invention has been described, it will be appreciated by those skilled in the art that these descriptions are all illustrative of, is not limiting the scope of the invention.The present invention can be made various variants and modifications according to the spirit of the present invention and principle by those skilled in the art, and these variants and modifications are also within the scope of the invention.
Claims (8)
1. an optimization method for Pulse Source, described Pulse Source includes framework, weight, flat board and ballast；Wherein, described method includes:
Utilize flat board-the earth FEM (finite element) model of pre-building that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；
Based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；
Be hit the rule of produced stress wave based on flat board, and Pulse Source is optimized；
Wherein, utilize flat board-the earth FEM (finite element) model of pre-building that Pulse Source plate impact process is analyzed, include situations below obtaining the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation:
Difference according to described tension weight churning merit, analyzes the deformation of described flat board and/or the Shock stress Wave transfer curve of the acceleration change curve of described flat board and/or described flat board；
Under the maximum impact merit of described weight, the difference according to described ballast weight, analyze the accelerating curve of described flat board and/or the Shock stress Wave transfer curve of described flat board；
Material according to described flat board and/or the difference of shape and/or size, analyze the deformation of described flat board and/or the Shock stress Wave transfer curve of the acceleration change curve of described flat board and/or described flat board.
2. method according to claim 1, wherein, described method also includes: set up flat board-the earth FEM (finite element) model；
Described flat board-the earth FEM (finite element) model of setting up includes:
Three-dimensional geometry physical model is utilized to set up the FEM (finite element) model of Pulse Source impact process；
Utilize explicit non-linear dynamic method to set up the earth and vibrate the contact interface of FEM (finite element) model, the described weight contact interface with flat board and described flat board and the earth；
Vibrate the contact interface of FEM (finite element) model, described weight and flat board and the contact interface of described flat board and the earth based on the FEM (finite element) model of described Pulse Source impact process, described the earth, set up flat board-the earth FEM (finite element) model.
3. method according to claim 2, wherein, the FEM (finite element) model of described Pulse Source impact process includes the FEM (finite element) model of described framework, weight, flat board and described the earth.
4. method according to claim 2, wherein, the described contact interface utilizing explicit non-linear dynamic method to set up contact interface and described flat board and the earth that the earth vibrates FEM (finite element) model, described weight and flat board includes:
Drucker-pula lattice (Drucker-Prager) model is utilized to set up described the earth vibration FEM (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 with the earth is set to viscous boundary.
5. method according to claim 2, wherein, the contact interface of the described contact interface based on the FEM (finite element) model of described Pulse Source impact process, described the earth vibration FEM (finite element) model, described weight and flat board and described flat board and the earth, sets up flat board-the earth FEM (finite element) model and includes:
The contact interface of FEM (finite element) model, described weight and flat board and the contact interface of described flat board and the earth is vibrated based on the FEM (finite element) model of described Pulse Source impact process, described the earth, the impact of described weight is reduced to the load with ballistic work and normal pressure and inputs the FEM (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 FEM (finite element) model of described Pulse Source impact process, wherein, the size of described power is equal with the gravity of described ballast.
6. an optimization device for Pulse Source, described Pulse Source includes framework, weight, flat board and ballast；Wherein, described device includes:
Analysis module, described analytic unit is for utilizing the flat board pre-build-the earth FEM (finite element) model that Pulse Source plate impact process is analyzed, to obtain the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation；Further, based on the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation, it is determined that flat board is hit the rule of produced stress wave；
Optimizing module, Pulse Source, for the rule of the produced stress wave that is hit based on flat board, is optimized by described optimization unit；
Wherein, described analysis module utilizes flat board-the earth FEM (finite element) model of pre-building that Pulse Source plate impact process is analyzed, and includes situations below obtaining the deformation of flat board and/or acceleration change situation and/or impact stress wave loops situation:
Difference according to described tension weight churning merit, analyzes the deformation of described flat board and/or the Shock stress Wave transfer curve of the acceleration change curve of described flat board and/or described flat board；
Under the maximum impact merit of described weight, the difference according to described ballast weight, analyze the accelerating curve of described flat board and/or the Shock stress Wave transfer curve of described flat board；
Material according to described flat board and/or the difference of shape and/or size, analyze the deformation of described flat board and/or the Shock stress Wave transfer curve of the acceleration change curve of described flat board and/or described flat board.
7. device according to claim 6, wherein, described device also includes:
MBM, described MBM is used for setting up flat board-the earth FEM (finite element) model；
Described MBM includes:
First modeling unit, the FEM (finite element) model that described first modeling unit sets up Pulse Source impact process for utilizing three-dimensional geometry physical model；
Second modeling unit, described second modeling unit vibrates the contact interface of FEM (finite element) model, the described weight contact interface with flat board and described flat board and the earth for utilizing explicit non-linear dynamic method to set up the earth；
3rd modeling unit, described 3rd modeling unit, for vibrating the contact interface of FEM (finite element) model, described weight and flat board and the contact interface of described flat board and the earth based on the FEM (finite element) model of described Pulse Source impact process, described the earth, sets up flat board-the earth FEM (finite element) model.
8. device according to claim 7, wherein, described 3rd modeling unit is for the FEM (finite element) model based on described Pulse Source impact process, described the earth vibration FEM (finite element) model, the contact interface of described weight and flat board, 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 FEM (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 FEM (finite element) model of described Pulse Source impact process, wherein, the size of described power is equal with the gravity of described ballast.
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