CN117113720A - Method and device for evaluating durability of vehicle body - Google Patents
Method and device for evaluating durability of vehicle body Download PDFInfo
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Abstract
The invention discloses a method and a device for evaluating the durability of a vehicle body, wherein the method comprises the steps of obtaining a load file of a target vehicle body, configuring a plurality of first variables and a plurality of second variables in a head file of a simulation tool, loading a load time domain of the load file to the plurality of first variables, loading a transient load of the load file to the plurality of second variables, and correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body, so that each preset hard point obtains the transient load of the corresponding time domain, and operating the simulation tool under the loading of the first variables and the second variables according to all preset hard points to obtain an evaluation result of the transient durability of the target vehicle body. According to the evaluation method, when the transient durability of the vehicle body is analyzed, the automatic loading of the load time domain and the transient load can be realized, the loading operation is not needed to be carried out by manually checking information one by one, a large amount of manual operation time is saved, and the evaluation efficiency of the transient durability analysis of the vehicle body is further improved.
Description
Technical Field
The invention relates to the technical field of vehicle durability evaluation, in particular to a vehicle durability evaluation method and device.
Background
In the development process of vehicles, durability evaluation needs to be carried out on the vehicle body, and transient durability analysis of the vehicle body is an important evaluation item. The traditional load loading flow of the vehicle body transient durability analysis is based on manual implementation, a technician is required to click command loading for many times, and the implementation has a large number of repeated operations and is easy to mistake, so that the vehicle body durability evaluation efficiency is lower.
Therefore, how to improve the evaluation efficiency of the transient durability analysis of the vehicle body is a technical problem to be solved at present.
Disclosure of Invention
The method and the device for evaluating the durability of the vehicle body can improve the evaluation efficiency of the transient durability analysis of the vehicle body.
The embodiment of the invention provides the following scheme:
in a first aspect, an embodiment of the present invention provides a method for evaluating durability of a vehicle body, including:
acquiring a load file of a target vehicle body, and configuring a plurality of first variables and a plurality of second variables in a head file of a simulation tool, wherein the target vehicle body is a vehicle body to be subjected to transient durability evaluation;
loading a load time domain of the load file to a plurality of first variables, and loading a transient load of the load file to a plurality of second variables;
correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body;
and operating the simulation tool under the loading of the first variable and the second variable according to all preset hard points so as to obtain the evaluation result of the transient durability of the target vehicle body.
In an alternative embodiment, configuring a header file of a simulation tool includes:
acquiring the number of hard points of a preset hard point and the load type of transient load;
obtaining variable quantity according to the product of the hard point quantity and the load type;
and configuring a corresponding number of first variables and second variables in the header file according to the number of variables.
In an alternative embodiment, before loading the load time domain of the load file to the plurality of first variables and loading the transient load of the load file to the plurality of second variables, the method further comprises:
determining the output number of each preset hard point according to the load file;
and updating the hard point numbers of the simulation tool according to all the output numbers so that the preset hard points corresponding to the output numbers are identical to the preset hard points corresponding to the hard point numbers.
In an alternative embodiment, loading the load time domain of the load file to a plurality of first variables and loading the transient load of the load file to a plurality of second variables comprises:
reading a time domain label of each load time domain in the load file, and mapping each load time domain to a corresponding first variable so as to enable each load time domain to be associated with a time domain card corresponding to a preset hard point;
and reading a load tag of each transient load in the load file, and mapping each transient load to a corresponding second variable so as to enable each transient load to be associated with a moment card or a force card corresponding to a preset hard point.
In an alternative embodiment, associating each first variable and each second variable to a preset hard point of the target body includes:
associating the first variable and the second variable to a correspondingly configured third variable in the header file, wherein the number of the third variable is the same as the number of the first variable and the second variable;
and mapping the third variable to a corresponding preset hard point so as to enable the load time domain and the transient load to be associated with a TLOAD card corresponding to the preset hard point.
In an alternative embodiment, running the simulation tool under the loading of the first variable and the second variable according to all preset hard points to obtain the evaluation result of the transient durability of the target vehicle body, including:
loading the results of loading each first variable and each second variable to the corresponding preset hard point to obtain the loading result of each preset hard point;
according to a fourth variable preset in the header file, all loading results are associated to DLOAD cards of simulation tools corresponding to the fourth variable, so that cumulative summation is carried out on all loading results;
and according to the output result of the DLOAD card operated by the simulation tool, obtaining the evaluation result of the transient durability.
In an alternative embodiment, obtaining a load file of a target vehicle body includes:
obtaining an experimental road spectrum of a target vehicle body for transient durability evaluation;
carrying out load decomposition on the experimental field road spectrum to obtain load information of each preset hard point, wherein the load information comprises a load time domain and a transient load;
and generating a load file according to the corresponding relation between the load information and each preset hard point.
In a second aspect, an embodiment of the present invention further provides an apparatus for evaluating durability of a vehicle body, including:
the system comprises an acquisition configuration module, a simulation tool, a load file acquisition module and a load file acquisition module, wherein the acquisition configuration module is used for acquiring a load file of a target vehicle body and configuring a plurality of first variables and a plurality of second variables in a header file of the simulation tool, wherein the target vehicle body is a vehicle body to be subjected to transient durability evaluation;
the loading module is used for loading the load time domain of the load file to a plurality of first variables and loading the transient load of the load file to a plurality of second variables;
the association module is used for correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body;
and the operation output module is used for operating the simulation tool under the loading of the first variable and the second variable according to all preset hard points so as to obtain the evaluation result of the transient durability of the target vehicle body.
In a third aspect, embodiments of the present invention also provide an electronic device comprising a processor and a memory, the memory being coupled to the processor, the memory storing instructions that when executed by the processor cause the electronic device to perform the steps of any of the methods of the first aspect.
In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any of the methods of the first aspect.
Compared with the prior art, the method and the device for evaluating the durability of the vehicle body have the following advantages:
according to the evaluation method, the load file of the target car body is obtained, a plurality of first variables and a plurality of second variables are configured in the head file of the simulation tool, the load time domain of the load file is loaded to the plurality of first variables, the transient load of the load file is loaded to the plurality of second variables, each first variable and each second variable are correspondingly associated to a preset hard point of the target car body, each preset hard point is enabled to obtain the transient load of the corresponding time domain, and the simulation tool is operated under the loading of the first variables and the second variables according to all preset hard points, so that the evaluation result of the transient durability of the target car body is obtained. According to the evaluation method, when the transient durability of the vehicle body is analyzed, automatic loading of a load time domain and a transient load can be realized, loading operation is carried out without manually checking information one by one, a large amount of manual operation time is saved, the evaluation efficiency of the transient durability analysis of the vehicle body is further improved, and meanwhile, the error problem caused by manual operation is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present description, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a method for evaluating durability of a vehicle body according to an embodiment of the present invention;
FIG. 2 is a diagram showing the steps for evaluating the durability of a vehicle body according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for evaluating durability of a vehicle body according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the embodiments of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of an evaluation method for durability of a vehicle body, where the evaluation method may be applied to a vehicle body design terminal for performing durability evaluation of a vehicle body, and the design terminal may be a PC (Personal Computer ) device or a server device, and may be capable of running the implementation steps of the evaluation method, and the method specifically includes:
s11, acquiring a load file of a target vehicle body, and configuring a plurality of first variables and a plurality of second variables in a header file of a simulation tool, wherein the target vehicle body is the vehicle body to be subjected to transient durability evaluation.
Specifically, when the durability analysis of the target vehicle body is implemented, the target vehicle body may be characterized based on a vehicle body model, for example, CAD (Computer Aided Diagnosis, computer-aided diagnosis) data of the vehicle body including vehicle body sheet metal, welding spots, welding seams, structural adhesive, and weight quality information of the entire vehicle may be acquired, and the vehicle body model may be built in a simulation tool. The load file can be acquired based on the requirement of the target vehicle body for transient durability evaluation, for example, the load file is acquired based on the processing of the running data of the vehicle carrying the target vehicle body, when the target vehicle body is subjected to durability evaluation, a plurality of preset hard points are arranged on the target vehicle body, and the transient durability evaluation result can be obtained by carrying out transient loading on the preset hard points.
Illustratively, obtaining a load file of a target vehicle body includes:
firstly, obtaining an experimental road spectrum of a target vehicle body for transient durability evaluation. The experimental road spectrum is acquired based on the requirement of transient durability evaluation of a target vehicle body, for example, for the target vehicle body of an off-road vehicle, the experimental road spectrum of a bumpy road condition can be selected for transient durability evaluation, the vehicle with the target vehicle body is controlled to travel to the bumpy road condition, the wheel end load and the corresponding acquisition time are stored in a preset period through the data acquisition equipment, and the experimental road spectrum can be characterized as a curve of the wheel end load changing along with the acquisition time.
And secondly, carrying out load decomposition on the experimental road spectrum to obtain load information of each preset hard point, wherein the load information comprises a load time domain and a transient load. Because the load in the experimental field road spectrum represents the wheel end load of the real vehicle in the road driving process, the wheel end load can be decomposed through multi-body dynamics software to determine the load information of each preset hard point, and the load time domain and the transient load in the load information are in a corresponding relationship, namely, each load time domain corresponds to one transient load.
And thirdly, generating a load file according to the corresponding relation between the load information and each preset hard point. When the load information is analyzed, a preset hard point corresponding to the load time domain and the transient load can be determined, and the corresponding relation can be represented by a form, for example, the representation form of the load file is preset as an EXCEL form.
The simulation tool may be a software tool capable of implementing load simulation, for example, hypermesh, and may configure its header file under a preset path, and the number of the first variables and the second variables may be set according to actual requirements, for example, when there are 30 preset hard points on the target vehicle body, 200 first variables and second variables may be set respectively.
In practical application, the reserved variable of the header file occupies variable addresses, and if too many reserved variables are reserved in the first variable and the second variable, the waste of computing resources is caused. Based on this, in one specific embodiment, configuring the header file of the simulation tool includes: the method comprises the steps of obtaining the number of hard points of preset hard points and the load types of transient loads, wherein the number of the hard points can be determined based on the transient load analysis requirement of a target vehicle body, and the number of the hard points is generally set to be 30 in the transient load analysis of the vehicle body; the load category of the transient load for each preset hard point typically comprises a three-way unit force and a three-way unit moment. The variable number can be obtained according to the product of the hard point number and the load type, and then the first variable and the second variable with corresponding numbers are configured in the header file according to the variable number. Taking 30 preset hard points as an example, it is reasonable to configure 180 first variables and 180 second variables respectively, and the configuration mode can reduce the waste of computing resources. After the header file and the load file are acquired, the process proceeds to step S12.
S12, loading the load time domain of the load file to a plurality of first variables, and loading the transient load of the load file to a plurality of second variables.
Specifically, when loading the load time domain through the first variable of the header file, loading can be performed based on a corresponding relationship between each load time domain and each first variable; similarly, when loading transient loads by the second variables, loading may be performed based on the correspondence between each transient load and each second variable. The load time domain represents the occurrence time of the corresponding transient load, and the transient load represents the load magnitude born by the corresponding preset hard point under the load time domain.
Illustratively, loading the load time domain of the load file to a plurality of first variables and loading the transient load of the load file to a plurality of second variables includes:
the first step is to read the time domain label of each load time domain in the load file, and map each load time domain to a corresponding first variable, so that each load time domain is associated with a time domain card (or called TABLED1 card) corresponding to a preset hard point. The preset hard points corresponding to the load time domains can be determined through the time domain labels, each first variable corresponds to one preset hard point, each load time domain can be mapped to the corresponding first variable based on the corresponding relation, so that the load time domains are associated with the time domain card corresponding to the preset hard point, when the transient load analysis of the vehicle body is carried out, one preset hard point comprises 6 unit loads (three-way unit force and three-way unit moment), therefore, one preset hard point comprises 6 load time domains, and 6 TABLED1 load channels can be generated through the 6 first variables, so that the association of the load time domains and the time domain card is realized.
And secondly, reading a load label of each transient load in the load file, and mapping each transient load to a corresponding second variable so as to enable each transient load to be associated with a Moment card or a Force card (or Force & movement card) corresponding to a preset hard point. Similarly, the preset hard point corresponding to the transient load can be determined through the load tag, and 6 unit load channels can be generated through 6 second variables, so that the association of the transient load and the moment card or the force card is realized.
In practical application, the output number of each hard point defined by the load file may be different from that defined in the simulation tool, so that the universality of the vehicle body in transient durability evaluation is insufficient. Based on this, in a specific embodiment, before loading the load time domain of the load file to the plurality of first variables and loading the transient load of the load file to the plurality of second variables, the method further comprises:
determining the output number of each preset hard point according to the load file, wherein the load file is obtained based on road spectrum decomposition, so that the output number of the load file can represent the preset hard points corresponding to the load time domain and the transient load; the hard spot numbers of the simulation tool are updated according to all the output numbers, when the hard spot numbers are updated, the preset hard spots corresponding to the output numbers can be ordered, the hard spot numbers in the simulation tool are also ordered, the two ordering results are compared, the hard spot numbers of the simulation tool are updated, the preset hard spots corresponding to the output numbers are identical to the preset hard spots corresponding to the hard spot numbers, transient durability analysis can be performed based on any load file through the updating of the hard spot numbers, and the application universality of the evaluation method can be improved. After the hard point number of the simulation tool is updated, each load time domain is loaded to a corresponding first variable, so that the first variable can represent the load time domain of the corresponding preset hard point, each transient load is loaded to a corresponding second variable, so that the transient load of the corresponding preset hard point can be represented, and the step S13 is carried out after loading is completed.
S13, correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body.
Specifically, the association of the first variables, the second variables and the preset hard points can be realized through a preset function, and as each first variable represents a load time domain corresponding to the preset hard point, each second variable represents a transient load corresponding to the preset hard point, the first variables and the second variables are assigned to the preset hard point through the preset function, so that the loading of the preset hard point is realized.
Illustratively, associating each first variable and each second variable to a preset hard point of the target body includes:
the first step, the first variable and the second variable are related to a third variable correspondingly configured in the header file, the number of the third variable is the same as that of the first variable and the second variable, and the first variable and the second variable of each preset hard point can be related through the third variable.
And secondly, mapping a third variable to a corresponding preset hard point so as to enable the load time domain and the transient load to be associated with a TLOAD card corresponding to the preset hard point. The TLOAD card is used for encapsulating the load time domain and the transient load to preset hard points, taking the target vehicle body containing 30 preset hard points as an example, each preset hard point contains 6 transient loads (three directional forces and three directional moments) and 6 corresponding load time domains, so that 6 first variable associated load time domains and 6 second variable associated transient loads are needed for one preset hard point, and then 6 first variables and 6 second variables are associated through 6 third variables, and when the target vehicle body contains 30 preset hard points, 180 first variables, 180 second variables and 180 third variables are respectively needed to realize loading of the load time domains and the transient loads to the corresponding preset hard points, and the step S14 is entered after the associated loading of all the preset hard points is completed.
S14, running a simulation tool under the loading of the first variable and the second variable according to all preset hard points to obtain an evaluation result of the transient durability of the target vehicle body.
Specifically, when the simulation tool is operated, the EIGRL card is required to be predefined to set the modal cutoff frequency through a header file, the TSTEP card is predefined to define a time step and a time step, the tab dmp1 card is predefined to set a damping value, the transient calculation load step of the Transient (modal) modal is predefined, and after the simulation tool is operated, the evaluation result of the transient durability of the target vehicle body is determined through the output result of the simulation tool.
For example, running a simulation tool under the loading of the first variable and the second variable according to all preset hard points to obtain an evaluation result of the transient durability of the target vehicle body, including:
the first step is to load the results of loading each first variable and each second variable to the corresponding preset hard point, and obtain the loading result of each preset hard point. The loading result of each preset hard point is an assignment result under the corresponding load time domain and transient load, and the loading result can be loaded to each preset hard point by a preset function or a third variable. In the transient durability evaluation, it is necessary to determine the durability of the target vehicle body based on the loading results of all the preset hard points.
And secondly, according to a fourth variable preset in the header file, associating all the loading results to DLOAD cards of simulation tools corresponding to the fourth variable so as to carry out cumulative summation on all the loading results. DLOAD cards may sum all TLOAD cards.
And thirdly, according to the output result of the DLOAD card operated by the simulation tool, obtaining the evaluation result of the transient durability. And the output result of the DLOAD card is used for representing the summation result of all TLOAD cards, namely the evaluation result of the transient durability of the target car body. Through setting of the fourth variable, a DLOAD card can be used for calculating the transient state of the vehicle body, manual operation accumulation is not needed, and evaluation efficiency of analysis of the transient durability of the vehicle body is further improved.
The following embodiments of the present invention will generally describe a method for evaluating transient durability of a vehicle body, referring to fig. 2, fig. 2 is a step chart of implementation. The method specifically comprises the following steps:
step 1, acquiring vehicle CAD data information, including vehicle body sheet metal, welding spots, welding seams, structural adhesive and weight quality information of the whole vehicle, and establishing a vehicle body model (or called a durability analysis model) of a target vehicle body.
Step 2, configuring 200 first variables in an Include header file, and numbering loadcollectors_ID so as to reserve a TABLED1 card corresponding to a load time domain channel; configuring 200 second variables, and carrying out loadcollectors_ID numbering to reserve Force & movement cards corresponding to transient load (three-way Force and three-way Moment) channels; configuring 200 third variables, and carrying out LoadCollector_ID number editing to reserve for the TLOAD1 card; and configuring a fourth variable, and associating DLOAD cards for calculating the transient state of the vehicle body.
Step 3, presetting an EIGRL card set modal cutoff frequency by an include header file; defining a time step and a time step of a TSTEP card in advance; presetting a TABDMP1 card to set a damping value; the Transient (modal) modal transient calculation load step is predefined for the body transient calculation.
And 4, collecting a road spectrum of the test field, and carrying out multi-body load decomposition on the collected road spectrum of the test field to obtain a load file of the target vehicle body.
And 5, referring to the load file through the Include header file, generating a load file for transient analysis of the vehicle body, wherein the actual road spectrum load file comprises N multiplied by 6 TABLED1 cards, the TABLED1 cards are numbered from 1 to N multiplied by 6, and N is the preset hard point number of the target vehicle body.
And 6, obtaining the loading sequence of the preset hard points (or suspension attachment points) of the target vehicle body according to the load file, and renumbering the node ID of the vehicle body model of the target vehicle body.
And 7, referencing the loading file generated in the step 5 with the vehicle body model generated in the step 6, and finally generating a vehicle body transient analysis model.
And 8, generating the modal stress of each order of the vehicle body and the modal participation factors of each order of the vehicle body based on the vehicle body transient analysis model, and calculating the transient durability of the vehicle body to determine the evaluation result of the transient durability of the target vehicle body.
Based on the same inventive concept as the evaluation method, the embodiment of the invention also provides an evaluation device for durability of a vehicle body, referring to fig. 3, fig. 3 is a schematic structural diagram of the evaluation device, and the device specifically includes:
the acquiring and configuring module 301 is configured to acquire a load file of a target vehicle body, and configure a plurality of first variables and a plurality of second variables in a header file of a simulation tool, where the target vehicle body is a vehicle body to be subjected to transient durability evaluation;
a loading module 302, configured to load a load time domain of a load file to a plurality of first variables, and load a transient load of the load file to a plurality of second variables;
the association module 303 is configured to associate each first variable and each second variable to a preset hard point of the target vehicle body correspondingly;
and the operation output module 304 is configured to operate the simulation tool under the loading of the first variable and the second variable according to all preset hard points, so as to obtain an evaluation result of the transient durability of the target vehicle body.
In an alternative embodiment, the obtaining the configuration module includes:
the first acquisition sub-module is used for acquiring the number of hard points of the preset hard points and the load type of the transient load;
the first obtaining submodule is used for obtaining variable quantity according to the product of the hard point quantity and the load type;
and the configuration submodule is used for configuring the first variables and the second variables with corresponding numbers in the header file according to the number of the variables.
In an alternative embodiment, the apparatus further comprises:
the determining module is used for determining the output number of each preset hard point according to the load file;
and the updating module is used for updating the hard point numbers of the simulation tool according to all the output numbers so that the preset hard points corresponding to the output numbers are identical with the preset hard points corresponding to the hard point numbers.
In an alternative embodiment, the loading module includes:
the first reading mapping sub-module is used for reading the time domain label of each load time domain in the load file and mapping each load time domain to a corresponding first variable so as to enable each load time domain to be associated with a time domain card corresponding to a preset hard point;
and the second reading mapping sub-module is used for reading the load label of each transient load in the load file and mapping each transient load to a corresponding second variable so as to enable each transient load to be associated with a moment card or a force card corresponding to a preset hard point.
In an alternative embodiment, the association module includes:
the first association submodule is used for associating the first variable and the second variable to a third variable correspondingly configured in the header file, wherein the number of the third variable is the same as that of the first variable and the second variable;
and the mapping sub-module is used for mapping the third variable to the corresponding preset hard point so as to enable the load time domain and the transient load to be associated with the TLOAD card corresponding to the preset hard point.
In an alternative embodiment, the operation output module includes:
the second obtaining submodule is used for loading the results of loading each first variable and each second variable to the corresponding preset hard point and obtaining the loading result of each preset hard point;
the second association sub-module is used for associating all loading results to DLOAD cards of simulation tools corresponding to the fourth variables according to the fourth variables preset in the header file so as to carry out accumulated summation on all loading results;
and the third obtaining submodule is used for obtaining the evaluation result of the transient durability according to the output result of the DLOAD card operated by the simulation tool.
In an alternative embodiment, the obtaining configuration module further includes:
the second acquisition submodule is used for acquiring an experimental road spectrum of the target vehicle body for transient durability evaluation;
a fourth obtaining submodule, configured to perform load decomposition on the experimental field road spectrum, and obtain load information of each preset hard point, where the load information includes a load time domain and a transient load;
and the generating sub-module is used for generating a load file according to the corresponding relation between the load information and each preset hard point.
Based on the same inventive concept as the evaluation method, an embodiment of the invention further provides an electronic device comprising a processor and a memory, the memory being coupled to the processor, the memory storing instructions which, when executed by the processor, cause the electronic device to perform the steps of any one of the evaluation methods.
Based on the same inventive concept as the evaluation method, the embodiments of the present invention also provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of any one of the evaluation methods.
The technical scheme provided by the embodiment of the invention has at least the following technical effects or advantages:
the method comprises the steps of obtaining a load file of a target vehicle body, configuring a plurality of first variables and a plurality of second variables in a head file of a simulation tool, loading a load time domain of the load file to the plurality of first variables, loading transient loads of the load file to the plurality of second variables, correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body, enabling each preset hard point to obtain transient loads of a corresponding time domain, and operating the simulation tool under the loading of the first variables and the second variables according to all preset hard points to obtain an evaluation result of transient durability of the target vehicle body. According to the evaluation method, when the transient durability of the vehicle body is analyzed, automatic loading of a load time domain and a transient load can be realized, loading operation is carried out without manually checking information one by one, a large amount of manual operation time is saved, the evaluation efficiency of the transient durability analysis of the vehicle body is further improved, and meanwhile, the error problem caused by manual operation is avoided.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (modules, systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A method for evaluating durability of a vehicle body, the method comprising:
acquiring a load file of a target vehicle body, and configuring a plurality of first variables and a plurality of second variables in a head file of a simulation tool, wherein the target vehicle body is a vehicle body to be subjected to transient durability evaluation;
loading a load time domain of the load file to the plurality of first variables and loading a transient load of the load file to the plurality of second variables;
correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body;
and operating the simulation tool under the loading of the first variable and the second variable according to all preset hard points so as to obtain the evaluation result of the transient durability of the target vehicle body.
2. The method for evaluating durability of a vehicle body according to claim 1, wherein the configuring of the header file of the simulation tool includes:
acquiring the number of hard points of the preset hard points and the load type of the transient load;
obtaining variable quantity according to the product of the hard point quantity and the load type;
and configuring the corresponding number of the first variables and the second variables in the header file according to the number of the variables.
3. The method for evaluating durability of a vehicle body according to claim 1, wherein before loading a load time domain of the load file to the plurality of first variables and loading a transient load of the load file to the plurality of second variables, the method further comprises:
determining the output number of each preset hard point according to the load file;
and updating the hard point numbers of the simulation tool according to all the output numbers so that the preset hard points corresponding to the output numbers are identical to the preset hard points corresponding to the hard point numbers.
4. The method of evaluating durability of a vehicle body according to claim 1, characterized in that the loading of the load time domain of the load file to the plurality of first variables and the loading of the transient load of the load file to the plurality of second variables includes:
reading a time domain label of each load time domain in the load file, and mapping each load time domain to the corresponding first variable so as to enable each load time domain to be associated with a time domain card corresponding to a preset hard point;
and reading a load tag of each transient load in the load file, and mapping each transient load to the corresponding second variable so as to enable each transient load to be associated with a moment card or a force card corresponding to a preset hard point.
5. The method of evaluating durability of a vehicle body according to claim 1, characterized in that the associating each first variable and each second variable to a preset hard point of the target vehicle body includes:
associating the first variable and the second variable to a correspondingly configured third variable in the header file, wherein the third variable is the same as the first variable and the second variable in number;
and mapping the third variable to a corresponding preset hard point so as to enable the load time domain and the transient load to be associated with a TLOAD card corresponding to the preset hard point.
6. The method according to claim 1, wherein the running the simulation tool under the loading of the first variable and the second variable according to all preset hard points to obtain the evaluation result of the transient durability of the target vehicle body includes:
loading the results of loading each first variable and each second variable to the corresponding preset hard point to obtain the loading result of each preset hard point;
according to a fourth variable preset in the header file, associating all loading results to DLOAD cards of the simulation tool corresponding to the fourth variable so as to carry out accumulated summation on all loading results;
and according to the output result of the DLOAD card operated by the simulation tool, obtaining the evaluation result of the transient durability.
7. The method for evaluating the durability of a vehicle body according to claim 1, wherein the acquiring the load file of the target vehicle body includes:
obtaining an experimental road spectrum of the target vehicle body for transient durability evaluation;
carrying out load decomposition on the experimental field road spectrum to obtain load information of each preset hard point, wherein the load information comprises a load time domain and a transient load;
and generating the load file according to the corresponding relation between the load information and each preset hard point.
8. An apparatus for evaluating durability of a vehicle body, comprising:
the system comprises an acquisition configuration module, a simulation tool, a load configuration module and a load configuration module, wherein the acquisition configuration module is used for acquiring a load file of a target vehicle body and configuring a plurality of first variables and a plurality of second variables in a header file of the simulation tool, wherein the target vehicle body is a vehicle body to be subjected to transient durability evaluation;
a loading module for loading a load time domain of the load file to the plurality of first variables and loading a transient load of the load file to the plurality of second variables;
the association module is used for correspondingly associating each first variable and each second variable to a preset hard point of the target vehicle body;
and the operation output module is used for operating the simulation tool under the loading of the first variable and the second variable according to all preset hard points so as to obtain the evaluation result of the transient durability of the target vehicle body.
9. An electronic device comprising a processor and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the electronic device to perform the steps of the method of any of claims 1-7.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311209271.3A CN117113720A (en) | 2023-09-18 | 2023-09-18 | Method and device for evaluating durability of vehicle body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311209271.3A CN117113720A (en) | 2023-09-18 | 2023-09-18 | Method and device for evaluating durability of vehicle body |
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| CN117113720A true CN117113720A (en) | 2023-11-24 |
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| CN202311209271.3A Pending CN117113720A (en) | 2023-09-18 | 2023-09-18 | Method and device for evaluating durability of vehicle body |
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| Country | Link |
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| CN (1) | CN117113720A (en) |
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- 2023-09-18 CN CN202311209271.3A patent/CN117113720A/en active Pending
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