CN113821868A - Automobile collision simulation analysis rapid post-processing method and system - Google Patents
Automobile collision simulation analysis rapid post-processing method and system Download PDFInfo
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Abstract
The invention discloses a method and a system for quickly post-processing automobile collision simulation analysis, which comprises the steps of establishing an automobile collision simulation environment; the numbering module is used for fixedly numbering the target measuring points; the writing module writes a generation command of an automobile output item into the template file and specifies an output window; and analyzing according to the generated command written into the template file, directly calling the template file in a post-processing module after the analysis is finished, and directly finishing the required post-processing work by the result file. The invention has the beneficial effects that: the time required by collision simulation post-processing is saved, the project period is shortened, and the cost is saved for enterprises.
Description
Technical Field
The invention relates to the technical field of CAE (computer aided engineering) simulation post-processing, in particular to a rapid post-processing method and a rapid post-processing system for automobile collision simulation analysis.
Background
In recent years, CAE collision simulation analysis of automobiles is an important link in automobile safety design, and accurate analysis results not only can save the cost required by tests, but also can greatly shorten the research and development period of the whole automobiles. Because of the uniqueness of automobile safety regulations, the content required to be output by the post-processing of the automobile CAE collision simulation analysis under the same working condition is almost consistent, but due to the limitation of software, the same steps are required to be repeated by an analyst for each analysis of the post-processing, so that the time cost is greatly wasted, and the progress of the whole project is also unfavorable.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above-mentioned conventional problems.
Therefore, the technical problem solved by the invention is as follows: based on the secondary development of CAE simulation post-processing software, a method for realizing rapid post-processing is provided.
In order to solve the technical problems, the invention provides the following technical scheme: a simulation analysis rapid post-processing method for automobile collision comprises establishing an automobile collision simulation environment; based on the fixed serial number, a writing module writes a generation command of an automobile output item into a template file and specifies an output window; and analyzing according to the generated command written into the template file, and calling the template file and the result file in a post-processing module after the analysis is finished to directly finish the required post-processing work.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the appointed output window comprises different analysis results corresponding to different data, and the output item needs to judge the output mode according to the analysis results.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the fixed numbering process comprises the steps of writing generating commands of the corresponding curves generated by post-processing into a template file, writing points to be output of each command into the corresponding template file, and designating an output window; the parts needing to output the cloud pictures and the animations are fixedly numbered; and writing commands of the cloud pictures and the animations generated by post-processing into the template file, writing part numbers to be output into the template file, and designating angles of the cloud pictures and the animations and designating an output window.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the establishing of the automobile collision simulation environment comprises the steps of establishing a vehicle collision data extraction module; establishing a vehicle real-time motion state simulation setting module; and establishing an accident recurrence module, wherein the accident recurrence module is obtained by analyzing an accident sample based on collision simulation.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the collision simulation method comprises the following steps: the automobile sensor records information including speed change, geographical position, preliminary road condition, environment image and accurate road condition; the vehicle collision data extraction module extracts vehicle data information according to the recorded information; and the real-time motion state simulation setting module sets speed change parameters within 20 seconds before and after the accident by the data information so as to define a speed curve.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the real-time motion state simulation setting module comprises a road surface friction parameter setting module and a road surface simulation model establishing module, wherein the road surface friction parameter setting module sets a road surface friction parameter according to the data information, and the road condition is defined according to the road surface friction parameter setting module; setting the ambient temperature when an accident occurs and establishing an ambient collision environment simulation model according to the data information so as to define an environment curve; establishing a finite element simulation model of the vehicle in which the accident occurs according to the data information so as to define the vehicle type; setting the obtained collision simulation model, and performing collision simulation analysis and calculation by adopting a heterogeneous homogeneous rigid-flexible coupling dynamic method;
and after the collision simulation analysis and calculation, obtaining the reproduction animation or the collision reproduction data through the result of the collision simulation.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the data extraction module, the vehicle real-time motion state simulation setting module, the accident reproduction module, the collision simulation parameter library and various resources of the accident handling scheme are constructed by network infrastructure middleware, and resource discovery, description, registration, positioning, distribution, resource information acquisition, updating and information release are carried out.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the accident recording database resource, the accident reproduction system encapsulation and virtualization of the simulation parameter model database resource, the accident processing scheme database resource and the collision simulation accident reproduction database resource which are established through simulation are standardized modules which accord with the accident adjudication Web service and the accident reproduction, and various distributed and heterogeneous resources are encapsulated into the accident adjudication Web service which accords with the service resource framework, the accident adjudication network workflow and the integrated platform unified standard functionalized modules.
As a preferred scheme of the automobile collision simulation analysis rapid post-processing method, the method comprises the following steps: the system comprises Web services, a service management server, a; the accident recurrence network workflow and the user call various data resources of the bottom layer through the Web service.
The automobile collision simulation analysis rapid post-processing system comprises a numbering module, a writing module and a post-processing module; the numbering module is used for fixedly numbering the target measuring points; the writing module is used for writing the generation command of the automobile output item into the template file and appointing an output window; and the post-processing module is used for directly calling the template file and the result file to directly complete the required post-processing work after the analysis is finished.
The invention has the beneficial effects that: the time required by collision simulation post-processing is saved, the project period is shortened, and the cost is saved for enterprises.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic diagram of a basic flow chart of a method and a system for simulation analysis and rapid post-processing of vehicle collision according to an embodiment of the present invention;
fig. 2 is a block diagram of a method and a system for simulation analysis and rapid post-processing of vehicle collision according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected and connected" in the present invention are to be understood broadly, unless otherwise explicitly specified or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to the schematic diagram of fig. 1, a flow chart of a rapid post-processing method for simulation analysis of vehicle collision is provided for the embodiment,
the concrete steps include that,
s1: establishing an automobile collision simulation environment; the establishing of the automobile collision simulation environment comprises the following steps,
establishing a vehicle collision data extraction module;
establishing a vehicle real-time motion state simulation setting module;
and establishing an accident recurrence module, and analyzing an accident sample by the accident recurrence module based on collision simulation.
The automobile sensor records information including speed change, geographical position, preliminary road condition, environment image and accurate road condition;
the vehicle collision data extraction module extracts vehicle data information according to the recorded information;
and the real-time motion state simulation setting module sets speed change parameters within 20 seconds before and after the accident by the data information so as to define a speed curve.
The real-time motion state simulation setting module comprises,
setting road friction parameters and establishing a road simulation model according to the data information so as to define road conditions;
setting the ambient temperature when an accident occurs and establishing an ambient collision environment simulation model according to the data information so as to define an environment curve;
the vehicle model is defined by establishing a vehicle Finite Element simulation model of accident occurrence through data information, wherein Finite Element Analysis (FEA) simulates a real physical system (geometric and load working condition) by a mathematical approximation method.
Setting the obtained collision simulation model, and performing collision simulation analysis and calculation by adopting a heterogeneous homogeneous rigid-flexible coupling dynamic method;
wherein, the rigid-flexible coupling kinetic equation of the variant isomorphism is as follows:
where θ represents a rotation angle, a represents a deformation coordinate, M represents a mass array, F represents a force array, and T represents a coordinate coefficient.
And after the collision simulation analysis and calculation, obtaining the reproduction animation or the collision reproduction data through the result of the collision simulation.
S2: the numbering module 100 performs fixed numbering processing on the target measurement points; the fixed number process includes the steps of,
writing a generation command for generating a corresponding curve by post-processing into a TPL (template) file, writing a point to be output by each command into a corresponding TPL file, and designating an output window, wherein the post-processing is corresponding to the preprocessing, and refers to the next step after the preprocessing, namely the step before the final processing is completed, or the step after a certain stage of working;
and fixedly numbering the parts needing to output the cloud pictures and the animations, wherein the fixed numbering is based on coordinate nodes of the target measuring points in the simulation environment, the geometric bodies are switched to a mesh (wireless grid network) mode, the nodes of the results to be checked are selected (the nodes are switched to a selection model instead of the geometric bodies), the displacement results are inserted, and the coordinate node displacement results of each step can be obtained after solving.
And writing commands of the cloud images and the animations generated by post-processing into the TPL file, writing part numbers to be output into the TPL file, designating angles of the cloud images and the animations, and designating an output window.
S3: based on the fixed number, the writing module 200 writes a generation command of the automobile output item into the TPL file and specifies an output window; the appointed output window comprises different analysis results corresponding to different data, the output item needs to judge an output mode according to the analysis results, for example, the analysis results such as pressure, deformation coefficient, speed and the like are output based on a text form, and the collision animation or picture is output in a jpg, png or gif form;
s4: the analysis is performed according to the generated command written in the template file, and after the analysis is completed, the template file and the result file are called in the post-processing module 300 to directly complete the required post-processing work.
In this embodiment, the data extraction module, the vehicle real-time motion state simulation setting module, the accident reproduction module, the collision simulation parameter library, and various resources of the accident handling scheme are constructed by the network infrastructure middleware tomcad and JBoss, so as to discover, describe, register, locate, allocate, acquire, update, and publish the resource information.
Accident recording database resources, accident reproduction system packaging and virtualization of simulation parameter model database resources, accident processing scheme database resources and collision simulation accident reproduction database resources established through simulation are standardized modules which accord with accident adjudication Web services and accident reproduction, and various distributed and heterogeneous resources are packaged into functional modules which accord with the accident adjudication Web services of a service resource framework, accident adjudication network workflows and the unified standards of an integrated platform.
The embodiment also comprises a Web service, wherein the Web server is generally referred to as a "website server" and refers to a program residing on some type of accounting computer on the Internet, and the Web service comprises a task allocation and scheduling service, a project management service, a data service, an information push service, a knowledge service, a user management service, a monitoring service, a claim settlement service, a website service, a simulation service and a result display service; the accident recurrence network workflow and the user call various data resources of the bottom layer through the Web service.
According to the method, the automobile collision simulation environment is established, and the method for carrying out simulation analysis and rapid post-processing on the automobile collision can save the time required by collision simulation post-processing, shorten the project period and save the cost for enterprises.
In order to verify the technical effects adopted in the method, the embodiment adopts the traditional technical scheme and the method of the invention to carry out comparison test, and compares the test results by means of scientific demonstration to verify the real effect of the method.
According to the traditional technical scheme, the automobile CAE collision simulation analysis is adopted, the content required to be output by post-processing under the same working condition is almost consistent, and due to software limitation, the same steps are required to be repeated every time an analyst performs analysis post-processing, so that the time cost is greatly wasted, and the progress of the whole project is unfavorable. Compared with the traditional method, the method can save a large amount of time cost and can realize quick post-processing. In this embodiment, the impact force, the spatial deformation pressure and the acceleration of the simulated vehicle collision are measured and compared in real time by using a traditional vehicle CAE collision simulation analysis method and the method.
And (3) testing environment: according to the traditional technical scheme, a model and a simulation environment are established in CAE software, and the automobile collision simulation environment is established according to the steps; the boundary condition loading is to load the speed of 120km/H for the whole automobile, namely the speed is 33m/s, the automobile and the wall are arranged, the automobile and the ground are in friction-free contact, the wall and the ground are arranged to be fixed, the whole calculation time is set to be 20ms, 50 groups of data are tested in each method, the impact force, the space deformation pressure and the acceleration of each group of data are obtained through calculation, the error rate is calculated through comparison with the actual value input by simulation, and the test comparison result is shown in the table 1. Randomly selecting different groups of data for example:
table 1: random group experiment result table.
The final values of the calculation are shown in table 2.
Table 2: the experimental results are shown in a comparison table.
| Experimental control sample | Conventional methods | The method of the invention |
| Acceleration of a vehicle | 2.1％ | 0.18％ |
| Pressure of space deformation | 0.4％ | 0.2％ |
| Impact force | 1.2％ | 0.34％ |
Compared with the traditional method, the method has higher accuracy in simulation analysis of the automobile collision, the accurate analysis result saves the time required by collision simulation post-processing, the cost required by the test can be saved, the whole automobile research and development period can be greatly shortened, the project period can be shortened, and the cost is saved for enterprises.
Example 2
Referring to the schematic diagram of fig. 2, the embodiment provides a rapid post-processing system for simulation analysis of vehicle collision, and the method of the embodiment can be implemented depending on the embodiment and includes a numbering module 100, a writing module 200, and a post-processing module 300; the numbering module 100 is used for fixedly numbering the target measurement points; the writing module 200 is configured to write a generation command of an automobile output item into the TPL file and specify an output window; the post-processing module 300 is used to directly call the TPL file and the result file after the analysis to directly complete the required post-processing work.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, the operations of processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described herein (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described herein includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein. A computer program can be applied to input data to perform the functions described herein to transform the input data to generate output data that is stored to non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
As used in this application, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being: a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of example, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for quickly post-processing automobile collision simulation analysis is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
establishing an automobile collision simulation environment;
the numbering module (100) performs fixed numbering processing on the target measuring points;
based on the fixed number, a writing module (200) writes a generation command of an automobile output item into a template file and specifies an output window;
and analyzing according to the generation command written into the template file, and calling the template file and the result file in a post-processing module (300) after the analysis is finished to directly finish the required post-processing work.
2. The automobile collision simulation analysis rapid post-processing method according to claim 1, characterized in that: the appointed output window comprises different analysis results corresponding to different data, and the output item needs to judge the output mode according to the analysis results.
3. The automobile collision simulation analysis rapid post-processing method according to claim 1 or 2, characterized in that: the fixed number processing includes the steps of,
writing the generation command of the post-processing generation corresponding curve into a template file, writing the point to be output of each command into a corresponding template file, and designating an output window;
the parts needing to output the cloud pictures and the animations are fixedly numbered;
and writing commands of the cloud pictures and the animations generated by post-processing into the template file, writing part numbers to be output into the template file, and designating angles of the cloud pictures and the animations and designating an output window.
4. The automobile collision simulation analysis rapid post-processing method according to claim 3, characterized in that: the establishing of the automobile collision simulation environment comprises the following steps,
establishing a vehicle collision data extraction module;
establishing a vehicle real-time motion state simulation setting module;
and establishing an accident recurrence module, wherein the accident recurrence module is obtained by analyzing an accident sample based on collision simulation.
5. The automobile collision simulation analysis rapid post-processing method according to claim 4, characterized in that: the collision simulation method comprises the following steps:
the automobile sensor records information including speed change, geographical position, preliminary road condition, environment image and accurate road condition;
the vehicle collision data extraction module extracts vehicle data information according to the recorded information;
and the real-time motion state simulation setting module sets speed change parameters within 20 seconds before and after the accident by the data information so as to define a speed curve.
6. The automobile collision simulation analysis rapid post-processing method according to claim 5, characterized in that: the real-time motion state simulation setting module comprises,
setting road friction parameters and establishing a road simulation model according to the data information so as to define road conditions;
setting the ambient temperature when an accident occurs and establishing an ambient collision environment simulation model according to the data information so as to define an environment curve;
establishing a finite element simulation model of the vehicle in which the accident occurs according to the data information so as to define the vehicle type;
setting the obtained collision simulation model, and performing collision simulation analysis and calculation by adopting a heterogeneous homogeneous rigid-flexible coupling dynamic method;
and after the collision simulation analysis and calculation, obtaining the reproduction animation or the collision reproduction data through the result of the collision simulation.
7. The automobile collision simulation analysis rapid post-processing method according to claim 5 or 6, characterized in that: the data extraction module, the vehicle real-time motion state simulation setting module, the accident reproduction module, the collision simulation parameter library and various resources of the accident handling scheme are constructed by network infrastructure middleware, and resource discovery, description, registration, positioning, distribution, resource information acquisition, updating and information release are carried out.
8. The automobile collision simulation analysis rapid post-processing method according to claim 7, characterized in that: the accident recording database resource, the accident reproduction system encapsulation and virtualization of the simulation parameter model database resource, the accident processing scheme database resource and the collision simulation accident reproduction database resource which are established through simulation are standardized modules which accord with the accident adjudication Web service and the accident reproduction, and various distributed and heterogeneous resources are encapsulated into the accident adjudication Web service which accords with the service resource framework, the accident adjudication network workflow and the integrated platform unified standard functionalized modules.
9. The automobile collision simulation analysis rapid post-processing method according to claim 8, characterized in that: the system comprises Web services, a service management server, a; the accident recurrence network workflow and the user call various data resources of the bottom layer through the Web service.
10. The utility model provides a quick after treatment system of car collision simulation analysis which characterized in that: the device comprises a numbering module (100), a writing module (200) and a post-processing module (300);
the numbering module (100) is used for carrying out fixed numbering processing on the target measuring points;
the writing module (200) is used for writing a generation command of an automobile output item into the template file and designating an output window;
and the post-processing module (300) is used for directly calling the template file after the analysis is finished and directly finishing the required post-processing work by the result file.
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