Body opening and closing part welding point optimization method, device, equipment and medium

Abstract

The application provides a vehicle body opening and closing part welding point optimization method, device, equipment and medium, including: based on the preset welding point parameter, the finite element modeling of the vehicle body opening and closing part is carried out, and the vehicle body opening and closing part model is obtained; the welding point parameterized model modeling is carried out, and the target vehicle body opening and closing part model is obtained; the running calculation is carried out, and the first simulation operation result of the vehicle body opening and closing part is obtained, including the first welding point information file; the first integrated analysis framework is built, the first simulation operation result is input into the framework, and the activation state parameter of the welding point in the first welding point information file is defined; according to the first preset analysis strategy and the activation state parameter, the first simulation operation result is solved and operated, and the first analysis result of the vehicle body opening and closing part is obtained; based on the first preset constraint condition, the first analysis result is screened and processed, and the first welding point optimization result of the vehicle body opening and closing part is obtained. Therefore, the welding point quantity reduction and layout optimization can be realized, the manufacturing cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of automotive body engineering technology, and in particular to a method, apparatus, electronic device, and computer-readable storage medium for optimizing weld points of body opening and closing components. Background Technology

[0002] In automotive body development, the design of weld points for opening and closing components (such as doors and engine hoods) has long relied on experience. Designers typically arrange weld points based on past project practices, only adding weld points for localized reinforcement when a certain performance requirement is not met. This easily leads to problems such as redundant weld points and unreasonable layout, which increases welding material consumption and labor time, drives up production costs, and reduces assembly efficiency.

[0003] This design pattern lacks synergistic optimization of multiple performance objectives. Redundant solder joints directly increase manufacturing costs, and an excessive number of solder joints can also affect production cycle time and reduce welding efficiency. Existing technologies struggle to optimize solder joint arrangement, failing to simultaneously meet multi-dimensional performance requirements such as overall stiffness and local strength and durability while reducing the number of solder joints and achieving a rational layout. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the first objective of this application is to propose a method for optimizing weld points of vehicle body opening and closing components. This method can remove redundant weld points and optimize local layout through parametric modeling and multi-objective optimization. Under the premise of meeting rigidity and durability requirements, it can reduce the number of weld points and optimize the layout, thereby reducing manufacturing costs and improving production efficiency.

[0006] The second objective of this application is to propose a device for optimizing weld points of vehicle body opening and closing components.

[0007] The third objective of this application is to propose an electronic device.

[0008] The fourth objective of this application is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, a first aspect of this application proposes a method for optimizing weld points in vehicle body opening and closing components. The method includes: performing finite element modeling of the vehicle body opening and closing component based on preset weld point parameters to obtain a vehicle body opening and closing component model; performing weld point parameterization modeling on the vehicle body opening and closing component model to obtain a target vehicle body opening and closing component model; performing calculations on the target vehicle body opening and closing component model to obtain a first simulation result of the vehicle body opening and closing component, wherein the first simulation result includes a first weld point information file; constructing a first integrated analysis framework and inputting the first simulation result into the first integrated analysis framework to define activation state parameters of the weld points in the first weld point information file through the first integrated analysis framework; solving and running the first simulation result within the first integrated analysis framework according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the vehicle body opening and closing component; and performing screening processing on the first analysis result based on first preset constraints to obtain a first weld point optimization result for the vehicle body opening and closing component.

[0010] According to the embodiment of this application, the method for optimizing weld points of vehicle body opening and closing components firstly performs finite element modeling of the vehicle body opening and closing components based on preset weld point parameters to obtain a vehicle body opening and closing component model. Then, the vehicle body opening and closing component model is modeled using weld point parameterization to obtain a target vehicle body opening and closing component model. Next, the target vehicle body opening and closing component model is run for calculation to obtain a first simulation result of the vehicle body opening and closing component. The first simulation result includes a first weld point information file. Then, a first integrated analysis framework is built, and the first simulation result is input into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file. Then, within the first integrated analysis framework, the first simulation result is solved and run according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the vehicle body opening and closing component. Finally, the first analysis result is filtered based on a first preset constraint condition to obtain a first weld point optimization result of the vehicle body opening and closing component. Therefore, by using parametric modeling and multi-objective optimization, redundant solder joints can be removed and local layouts optimized. Under the premise of meeting stiffness and durability requirements, the number of solder joints can be reduced and the layout optimized, thereby reducing manufacturing costs and improving production efficiency.

[0011] In addition, the method for optimizing weld points of vehicle body opening and closing components according to the above embodiments of this application may also have the following additional technical features: In one embodiment of this application, a weld point parameterization model is performed on the vehicle body opening and closing component model to obtain a target vehicle body opening and closing component model. This includes: determining the set of weld points to be optimized in the vehicle body opening and closing component model, obtaining the parameter information corresponding to each weld point in the weld point set, and constructing a first weld point model and a second weld point model corresponding to each weld point based on the parameter information; defining keywords for the first weld point model and the second weld point model respectively to obtain the target vehicle body opening and closing component model.

[0012] In one embodiment of this application, when the vehicle body opening and closing component is a door, the first analysis result includes vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline. The first preset constraint condition includes one or more of the following: vertical stiffness constraint condition, front point stiffness constraint condition of the window frame, rear point stiffness constraint condition of the window frame, inner point stiffness constraint condition of the waistline, and outer point stiffness constraint condition of the waistline.

[0013] In one embodiment of this application, a locally high-load area of ​​the vehicle body opening and closing component is determined, and the weld point parameters corresponding to the locally high-load area are obtained; finite element modeling of the locally high-load area is performed based on the weld point parameters to obtain a local area model of the vehicle body opening and closing component; a weld point parameterized model is performed on the local area model to obtain a target local area model; calculations are performed on the target local area model to obtain a second simulation result of the vehicle body opening and closing component, wherein the second simulation result includes a second weld point information file and load application information; a second integrated analysis framework is built, and the second simulation result is input into the second integrated analysis framework to define the activation state parameters of the weld points in the second weld point information file through the second integrated analysis framework; within the second integrated analysis framework, the second simulation result is solved according to the activation state parameters to obtain a second analysis result of the vehicle body opening and closing component; the second analysis result is filtered based on the second preset constraint conditions and load application information to obtain the second weld point optimization result of the vehicle body opening and closing component.

[0014] In one embodiment of this application, a parameterized model of solder joints is performed on a local region model to obtain a target local region model. This includes: determining the loaded component in the local region model and applying a preset load to the loaded component, wherein the load direction of the preset load is the same as the load direction of the loaded component; determining the set of solder joints to be optimized in the local region model and obtaining the parameter information corresponding to each solder joint in the set, and constructing a first solder joint model and a second solder joint model corresponding to each solder joint based on the parameter information; defining keywords for the first solder joint model and the second solder joint model respectively to obtain the target local region model.

[0015] In one embodiment of this application, the load application information includes the minimum value of the extreme damage value of the base material near the loaded component. The second analysis result is screened based on the second preset constraint and the load application information to obtain the second weld point optimization result of the vehicle body opening and closing component. This includes: obtaining the fatigue damage value of the first weld point model and the second weld point model corresponding to each weld point in the weld point set based on the second analysis result, and taking the minimum value as the upper limit value of the damage optimization target; determining the target weld point from the weld point set according to the fatigue damage value and the upper limit value, and generating the second weld point optimization result based on the target weld point.

[0016] In one embodiment of this application, the target weld point optimization result of the vehicle body opening and closing component is generated based on the first weld point optimization result and the second weld point optimization result.

[0017] To achieve the above objectives, a second aspect of this application proposes a device for optimizing weld points of a vehicle body opening and closing component. The device includes: a first modeling module for performing finite element modeling of the vehicle body opening and closing component based on preset weld point parameters to obtain a vehicle body opening and closing component model; a second modeling module for performing parameterized weld point modeling on the vehicle body opening and closing component model to obtain a target vehicle body opening and closing component model; a calculation module for performing calculations on the target vehicle body opening and closing component model to obtain a first simulation calculation result of the vehicle body opening and closing component, wherein the first simulation calculation result includes a first weld point information file; a definition module for building a first integrated analysis framework and inputting the first simulation calculation result into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file through the first integrated analysis framework; a solution module for solving the first simulation calculation result within the first integrated analysis framework according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the vehicle body opening and closing component; and a processing module for performing screening processing on the first analysis result based on first preset constraints to obtain a first weld point optimization result of the vehicle body opening and closing component.

[0018] According to the embodiment of this application, the body opening and closing component weld point optimization device first performs finite element modeling of the body opening and closing component based on preset weld point parameters using a first modeling module to obtain a body opening and closing component model. Then, a second modeling module performs parameterized modeling of the weld points on the body opening and closing component model to obtain a target body opening and closing component model. Next, a calculation module performs calculations on the target body opening and closing component model to obtain a first simulation calculation result of the body opening and closing component. The first simulation calculation result includes a first weld point information file. Then, a definition module builds a first integrated analysis framework and inputs the first simulation calculation result into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file. Then, a solution module solves the first simulation calculation result within the first integrated analysis framework according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the body opening and closing component. Finally, a processing module performs screening processing on the first analysis result based on a first preset constraint condition to obtain the first weld point optimization result of the body opening and closing component. Therefore, by using parametric modeling and multi-objective optimization, redundant solder joints can be removed and local layouts optimized. Under the premise of meeting stiffness and durability requirements, the number of solder joints can be reduced and the layout optimized, thereby reducing manufacturing costs and improving production efficiency.

[0019] To achieve the above objectives, a third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements any of the above-described methods for optimizing weld points of vehicle body opening and closing components.

[0020] According to the embodiments of this application, when the processor executes the computer program, the electronic device implements any of the above-mentioned methods for optimizing weld points of body opening and closing parts. It achieves the removal of redundant weld points and optimization of local arrangement through parametric modeling and multi-objective optimization. Under the premise of satisfying rigidity and durability performance, it reduces the number of weld points and optimizes the layout, thereby reducing manufacturing costs and improving production efficiency.

[0021] To achieve the above objectives, a fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement any of the above-described methods for optimizing weld points of vehicle body opening and closing components.

[0022] According to the embodiments of this application, a computer-readable storage medium storing a computer program thereon implements any of the above-mentioned methods for optimizing weld points of vehicle body opening and closing components when executed by a processor. This method achieves the removal of redundant weld points and optimization of local layout through parametric modeling and multi-objective optimization. Under the premise of satisfying rigidity and durability performance, it reduces the number of weld points and optimizes the layout, thereby reducing manufacturing costs and improving production efficiency.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating a method for optimizing weld points of vehicle body opening and closing components according to some embodiments of this application. Figure 2 This is a schematic diagram of a finite element model of a car door, showing the completion of all possible weld points for the body opening and closing component weld point optimization method according to some embodiments of this application; Figure 3 This is an integrated analysis structure diagram of a method for optimizing weld points of vehicle body opening and closing components according to some embodiments of this application; Figure 4 This is a schematic diagram of the multi-objective optimization iterative process of the body opening and closing component weld point optimization method according to some embodiments of this application; Figure 5 This is a schematic diagram of a door finite element model of the weld points in the local load-bearing area of ​​the body opening and closing component weld point optimization method according to some embodiments of this application; Figure 6 This is a structural block diagram of the fatigue integrated analysis of the welding point optimization method for vehicle body opening and closing components according to some embodiments of this application; Figure 7 This is a schematic diagram of the fatigue optimization iteration process of the body opening and closing component weld point optimization method according to some embodiments of this application; Figure 8 This is a schematic diagram illustrating the switch durability according to some embodiments of this application; Figure 9 This is a flowchart illustrating a method for optimizing weld points of vehicle body opening and closing components according to a specific embodiment of this application. Figure 10 This is a block diagram of a body opening and closing component weld point optimization device according to some embodiments of this application; Figure 11 This is a schematic diagram of the structure of an electronic device according to some embodiments of this application. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] The following description, with reference to the accompanying drawings, outlines a method, apparatus, electronic device, and computer-readable storage medium for optimizing weld points on vehicle body opening and closing components according to embodiments of this application.

[0027] The method for optimizing weld points of vehicle body opening and closing components provided in this application embodiment can be executed by an electronic device, such as a mobile phone, tablet computer, PDA, or server, etc., without any limitation.

[0028] In this embodiment, the electronic device may include a processing component, a storage component, and a driving component. Optionally, the driving component and the processing component may be integrated, and the storage component may store an operating system, application programs, or other program modules. The processing component implements the vehicle body opening and closing component weld joint optimization method provided in this embodiment by executing the application programs stored in the storage component.

[0029] like Figure 1 As shown, the method for optimizing weld points of vehicle body opening and closing components according to an embodiment of this application may include the following steps: Step S1: Perform finite element modeling of the vehicle body opening and closing components based on preset weld point parameters to obtain the vehicle body opening and closing component model. The preset weld point parameters can be calibrated according to actual conditions.

[0030] Specifically, based on the structural design data of the vehicle body opening and closing components and combined with preset weld point parameters, a finite element model of the vehicle body opening and closing components is constructed using finite element analysis software (such as ABAQUS). The preset weld point parameters can be calibrated according to actual conditions, including the arrangement location, size specifications, material properties, and connection methods of each potential weld point in the vehicle body opening and closing components. During the modeling process, for locations where weld points may be arranged in the design data, all potential weld points are pre-filled, without limiting the actual number of weld points, ensuring that the model can completely cover all potential weld points required for subsequent optimization, providing a foundation for subsequent parametric modeling and optimization analysis of weld points. For example, Figure 2 To complete the finite element model of the car door for all possible weld points.

[0031] Step S2: Perform parametric modeling of weld points on the vehicle body opening and closing component model to obtain the target vehicle body opening and closing component model.

[0032] Specifically, based on the completed finite element model of the vehicle body opening and closing component, a parametric modeling operation for the weld points is carried out. The weld points in the vehicle body opening and closing component model are set as parameter variables that can be controlled by the optimization algorithm. Each weld point corresponds to a parameter with two states, thereby constructing a target vehicle body opening and closing component model that can change the activation state of the weld points according to different parameter configurations.

[0033] In one embodiment of this application, a weld point parameterization model is performed on the vehicle body opening and closing component model to obtain a target vehicle body opening and closing component model. This includes: determining the set of weld points to be optimized in the vehicle body opening and closing component model, obtaining the parameter information corresponding to each weld point in the weld point set, and constructing a first weld point model and a second weld point model corresponding to each weld point based on the parameter information; defining keywords for the first weld point model and the second weld point model respectively to obtain the target vehicle body opening and closing component model.

[0034] Specifically, first, the set of weld points to be optimized in the vehicle body opening and closing component model is determined. Based on the structural stress characteristics of the vehicle body opening and closing component, the weld points that need to be optimized are selected to form a set of weld points to be optimized, such as weld points marked as S01, S02, S03, etc.

[0035] Then, for each weld point in the weld point set, finite element analysis software (such as ABAQUS) is used to construct an independent .inp file for the information of a single weld point. Taking weld point S01 as an example, its corresponding file can be named S01_1.inp, which is the first weld point model. This model can contain node information, element information, attribute information, material information, and tie connection information with the vehicle body opening and closing parts. At the same time, an empty .inp file is constructed for each weld point, such as named S01_0.inp, which is the second weld point model, used to represent the state when the weld point does not exist.

[0036] Finally, keywords are defined for the first and second weld point models respectively. For example, when the vehicle body opening and closing component is a door, a main door model file DOOR.inp can be constructed. In this main file, the keyword `include` is used to associate the file corresponding to each weld point. For example, for weld point S01, the command stream "*include, input=S01_1.inp" is written in the main file to associate the first weld point model, and "*include, input=S01_0.inp" is written to associate the second weld point model. The position where the file name suffix "1" or "0" in the above command stream is located is set as a parameterization control bit, and the parameter name is set to the weld point number S01, representing the state of weld point S01. When the parameter value is 1, the main file DOOR.inp references S01_1.inp, and all the definition information of weld point S01 is successfully referenced in the model. When the parameter value is 0, the main file DOOR.inp references S01_0.inp, and there is no weld point definition at this position. Using the same method, other weld points (such as S02, S03, etc.) are parameterized until the entire set of weld points to be optimized is defined, thereby obtaining the target vehicle body opening and closing component model, providing a parameterized basis for subsequent optimization iterations.

[0037] Step S3: Perform calculations on the target vehicle body opening and closing component model to obtain the first simulation calculation result of the vehicle body opening and closing component, wherein the first simulation calculation result includes the first weld point information file.

[0038] Specifically, calculations are performed on the target vehicle body opening and closing component model. For example, when the opening and closing component is a car door, the DOOR.inp file is submitted to a solver (such as ABAQUS) for finite element analysis. The solver reads the model information from the DOOR.inp file, including geometry, materials, boundary conditions, and weld point definitions controlled by parametric parameters, and completes the finite element calculation to obtain the first simulation result. This result set may include a calculation result database file (such as an ODB file) and a calculation status monitoring file (such as a STA file). The calculation status monitoring file is the first weld point information file, which records the activation status of each parametric weld point (such as S01, S02, etc.) under the current parameter configuration. When the parameter value is 1, the weld point is activated and participates in the calculation; when the parameter value is 0, the weld point is not activated. This provides basic data for the next step of building an integrated analysis framework.

[0039] Step S4: Build a first integrated analysis framework and input the first simulation result into the first integrated analysis framework to define the activation state parameters of the solder joints in the first solder joint information file through the first integrated analysis framework.

[0040] Specifically, an automated process analysis framework is built in a general integrated software platform. The first simulation result is used as input, and the first solder joint information file is parsed through this framework to define the activation state parameters of each solder joint, thus providing a parameterized control basis for subsequent optimization iterations.

[0041] Taking a car door as an example, preferably, a first integrated analysis framework is built in the ISIGHT integrated software platform. First, prepare the file set required for the integrated automated process. This file set may include: a batch processing execution command file for running finite element solutions (e.g., run_door.bat), the main assembly finite element model file DOOR.inp, all weld point files associated with the main assembly model file (e.g., S01_1.inp, S01_0.inp, S02_1.inp, S02_0.inp, etc.), and the first weld point information file (e.g., DOOR.sta). Second, build the automated process framework in the ISIGHT platform. By dragging and dropping Simcode components into the flowchart, configure the functions of each component. The state parsing Simcode component is used to define the activation state parameters of the weld points. This component reads the first weld point information file DOOR.sta, parses the activation state of each weld point recorded therein (e.g., S01=1 indicates the weld point exists, S02=0 indicates the weld point does not exist), and maps these state values ​​to identifiable design variable parameters in the optimization design. The Simcode component triggers the finite element solution process. It calls the batch command file `run_door.bat` to write the weld point status under the current parameter configuration into the main model file and submits it to the ABAQUS solver for a new round of calculations. The Simcode component extracts the calculation results. It extracts the displacement results of key detection points from the newly generated results, providing data input for subsequent stiffness calculations. Next, a Calculator component is added to the ISIGHT platform to define the calculation formulas for various stiffness parameters of the door. This component receives the displacement results read by the Simcode component and calculates performance indicators such as vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline according to predefined calculation rules (such as the conversion relationship between displacement and stiffness).

[0042] The first integrated analysis framework is built through the above configuration. This framework can automatically read the weld activation status in the first weld information file, define it as an optimizable design variable, and drive the automated loop of finite element solution and result extraction, providing a complete integrated operating environment for subsequent multi-objective stiffness optimization.

[0043] Step S5: Within the first integrated analysis framework, the first simulation results are solved and run according to the first preset analysis strategy and activation state parameters to obtain the first analysis result of the vehicle body opening and closing component. The first preset analysis strategy can be defined according to actual conditions.

[0044] Specifically, based on the first integrated analysis framework, an optimization design component is introduced, a first preset analysis strategy is set, and the performance response of the vehicle body opening and closing components under different weld point configurations is obtained through iterative calculations, which serves as the first analysis result.

[0045] Taking the car door as an example, such as Figure 3 As shown, in the ISIGHT integrated analysis platform, based on the automated framework composed of the Simcode and Calculator components, the Optimization component is dragged in to construct a complete multi-objective stiffness optimization process. Specifically, firstly, design variables are set, using the activation state parameters of the weld point set S01~SXX to be optimized as design variables. Each weld point state parameter is a two-level discrete variable, with a level value of "1" indicating the presence of the weld point and a level value of "0" indicating its absence. Secondly, optimization objectives and weights are set. The various stiffness parameters of the door calculated and output by the Calculator component are used as optimization objectives, including vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline. For each stiffness objective, the Target strategy is selected, a preset stiffness performance design index is input, and a weight value is set for each stiffness objective. In this embodiment, the weight of each stiffness objective can be set to 1, indicating that each stiffness performance has equal importance in the optimization process. Next, the optimization algorithm and iterative loop are set. Preferably, the NSGA-II multi-objective genetic algorithm is selected as the optimization algorithm, and the optimization process is started. Based on the current weld point configuration (a set of 0 / 1 combinations of S01~SXX), the optimization algorithm drives the Simcode component to call the solver to perform finite element calculations, generating new simulation results. The Calculator component extracts displacement data from the results and calculates various stiffness values. The optimization algorithm evaluates the merits of the current weld point configuration based on the closeness of the calculated stiffness values ​​to the preset target values ​​and the weight ratio of various stiffness targets. Based on the evaluation results, the optimization algorithm generates a new generation of weld point configurations through crossover, mutation, and other operations, and submits them to the Simcode component for the next round of iterative calculations until the preset number of iterations is completed or the target parameters are traversed.

[0046] Step S6: Based on the first preset constraint conditions, the first analysis results are screened to obtain the first weld point optimization results of the vehicle body opening and closing parts.

[0047] Specifically, in the iterative optimization process of the above solution operation, the solder joint configuration generated in each generation is screened according to the first preset constraint condition, and only the schemes that meet the constraint condition are retained. Finally, the optimal solution is selected from the set of schemes that meet the condition as the first solder joint optimization result.

[0048] In one embodiment of this application, when the vehicle body opening and closing component is a door, the first analysis result includes vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline. The first preset constraint condition includes one or more of the following: vertical stiffness constraint condition, front point stiffness constraint condition of the window frame, rear point stiffness constraint condition of the window frame, inner point stiffness constraint condition of the waistline, and outer point stiffness constraint condition of the waistline. The first preset constraint condition can be defined according to actual circumstances.

[0049] Specifically, such as Figure 4 As shown, when the vehicle body opening and closing component is a door, the first analysis result may include vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline. The first preset constraint conditions correspond to one or more of the following: vertical stiffness constraint conditions, front point stiffness constraint conditions of the window frame, rear point stiffness constraint conditions of the window frame, inner point stiffness constraint conditions of the waistline, and outer point stiffness constraint conditions of the waistline. Each stiffness constraint condition in the first preset constraint conditions can be defined according to the performance design indicators of the specific vehicle model. For example, the vertical stiffness must be greater than a certain target value, and the stiffness of each window frame must be greater than another target value, etc.

[0050] During the optimization iteration process, after each round of calculation yields a set of stiffness values, the optimization algorithm automatically determines whether the current weld point configuration satisfies the first preset constraint condition. If the current weld point configuration satisfies all constraints under the first preset constraint condition, it is marked as a feasible solution and included in the candidate solution set. If the current weld point configuration fails to satisfy any constraint condition, it is marked as an infeasible solution and not included in the candidate solution set. Simultaneously, based on the weight ratio of each stiffness objective, the optimization algorithm seeks a solution that achieves a relatively optimal balance across all stiffness objectives, provided that the constraints are met. The weight value determines the relative importance of different stiffness objectives in evaluating the merits of the solutions; the higher the weight, the greater the impact of achieving that stiffness objective on the solution ranking.

[0051] After iteration, a set of feasible solutions is selected from the candidate solution set as the optimal solution for multi-objective optimization. This optimal solution provides the state value combination of all solder joint state parameters S01~SXX for the solder joint group to be optimized, where "1" indicates that the solder joint is retained and "0" indicates that the solder joint is removed. Based on design experience, this optimal solution is identified and confirmed to obtain the final optimization result of the first solder joint.

[0052] This embodiment first performs finite element modeling of the vehicle body opening and closing component based on preset weld point parameters to obtain the vehicle body opening and closing component model. Then, it performs parametric modeling of the weld points on the vehicle body opening and closing component model to obtain the target vehicle body opening and closing component model. Next, it runs calculations on the target vehicle body opening and closing component model to obtain the first simulation calculation result of the vehicle body opening and closing component. The first simulation calculation result includes a first weld point information file. Then, it builds a first integrated analysis framework and inputs the first simulation calculation result into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file. Then, within the first integrated analysis framework, it solves and runs the first simulation calculation result according to the first preset analysis strategy and activation state parameters to obtain the first analysis result of the vehicle body opening and closing component. Finally, it performs screening processing on the first analysis result based on the first preset constraints to obtain the first weld point optimization result of the vehicle body opening and closing component. Thus, through parametric modeling and multi-objective optimization, redundant weld points can be removed and the local arrangement can be optimized. Under the premise of satisfying stiffness and durability performance, the number of weld points can be reduced and the layout optimized, thereby reducing manufacturing costs and improving production efficiency.

[0053] In some embodiments of this application, a locally high-load area of ​​the vehicle body opening and closing component is determined, and the weld point parameters corresponding to the locally high-load area are obtained; finite element modeling of the locally high-load area is performed based on the weld point parameters to obtain a local area model of the vehicle body opening and closing component; a weld point parameterized model is performed on the local area model to obtain a target local area model; calculations are performed on the target local area model to obtain a second simulation result of the vehicle body opening and closing component, wherein the second simulation result includes a second weld point information file and load application information; a second integrated analysis framework is built, and the second simulation result is input into the second integrated analysis framework to define the activation state parameters of the weld points in the second weld point information file through the second integrated analysis framework; within the second integrated analysis framework, the second simulation result is solved according to the activation state parameters to obtain a second analysis result of the vehicle body opening and closing component; the second analysis result is filtered based on the second preset constraint conditions and load application information to obtain the second weld point optimization result of the vehicle body opening and closing component. The second preset constraint conditions can be calibrated according to actual conditions.

[0054] Specifically, based on the stress characteristics of the vehicle body opening and closing components under specific operating conditions, key local areas with concentrated stress and significant impact on fatigue durability are identified. These areas are designated as high-load local areas, and parameter information of all weld points within these areas is extracted as the basis for subsequent optimization design.

[0055] In one embodiment of this application, taking a car door as an example, the extreme usage scenario is addressed by opening the car door beyond its design limit. First, the key areas affected by tension during the over-opening process of the limiter are identified. The group of weld points connected to the limiter reinforcement plate within this area is determined as a local high-load area, and parameter information such as the geometric position, connection properties, and material characteristics of these weld points are obtained.

[0056] Then, finite element modeling of the locally high-load area is performed based on the weld point parameters to obtain a local area model of the vehicle body opening and closing component. Specifically, a finite element model containing detailed structural features of the locally high-load area is constructed based on the weld point parameters, serving as the foundation model for subsequent parametric modeling. Preferably, this model includes at least the local area's geometry, material properties, element meshing, and initial arrangement information of the weld points to be optimized. For example, Figure 5 A schematic diagram of the finite element model of a car door with welds in a locally loaded area.

[0057] Next, a parameterized model of the weld points is constructed for the local region model to obtain the target local region model. Specifically, the weld points to be optimized in the constructed local region model are parameterized and defined. Each weld point is set as a parameter variable that can be controlled by the optimization algorithm and has two states: "existence" and "non-existence". To distinguish it from the weld point set in the first aspect of stiffness optimization, the weld points to be optimized in the local high-load region can be named F01~FXX. For each weld point, a first weld point model containing complete weld point definitions (such as F01_1.inp) and an empty information model without any weld point definitions (such as F01_0.inp) are constructed. These models are then parameterized and called in the main model file using keywords, thereby constructing a target local region model that can change the activation state of the weld points according to different parameter configurations.

[0058] Subsequently, calculations are performed on the target local area model to obtain the second simulation results for the vehicle body opening and closing components. These second simulation results may include a second weld point information file and load application information. Specifically, the constructed target local area model is submitted to a finite element solver for calculation. The solver reads the model information and completes the finite element calculation, generating a set of calculation result files, which constitute the second simulation results. Preferably, this result set includes at least: a second weld point information file (such as the calculation result monitoring file DOOR_Fatigue.sta) for recording the current weld point activation state, and a load application information file for storing the load application location, direction, and magnitude.

[0059] Next, a second integrated analysis framework is built, and the second simulation results are input into the second integrated analysis framework to define the activation state parameters of the weld points in the second weld point information file. Specifically, the second integrated analysis framework is built in a general integrated software platform, and the second simulation results are used as input. The framework parses the second weld point information file to define the activation state parameters of each weld point in the local high-load area, providing a parameterized control basis for subsequent local optimization iterations. In one embodiment of this application, taking a car door as an example, building the second integrated analysis framework in the ISIGHT integrated platform may include the following steps: preparing the set of files required for the integrated automated process. This file collection includes batch execution command files for running finite element solutions (such as run_door_fatigue.bat), the main assembly finite element model file DOOR.inp, all weld point files associated with the main assembly model file (such as F01_1.inp, F01_0.inp, F02_1.inp, F02_0.inp, etc.), and a second weld point information file (such as the calculation result monitoring file DOOR_Fatigue.sta). An automated workflow framework is built in the ISIGHT platform. By dragging and dropping the Simcode component into the flowchart, the state parsing Simcode component is used to define the activation state parameters of the weld points. This component reads the second weld point information file DOOR_Fatigue.sta, parses the activation state of each weld point recorded therein, and maps these state values ​​to identifiable design variable parameters in the optimization design. The Simcode component is used to trigger the ABAQUS solver to run. This component calls the batch command file run_door_fatigue.bat, writes the weld point status under the current parameter configuration into the main model file, and submits it to the ABAQUS solver to perform finite element calculations, outputting the ODB result file DOOR_F.odb.

[0060] With the above configuration, the second integrated analysis framework is complete. This framework can automatically read the solder joint activation status from the second solder joint information file, define it as an optimizable design variable, and drive the automated loop of ABAQUS finite element solution.

[0061] Subsequently, within the second integrated analysis framework, the second simulation results are solved based on the activation state parameters to obtain the second analysis results for the vehicle body opening and closing components. Specifically, based on the second integrated analysis framework, and using the defined weld point activation state parameters, the solver is driven to perform finite element calculations to obtain the performance response of the locally high-load area under different weld point configurations, which is then used as the second analysis result. In one embodiment of this application, taking a vehicle door as an example, as follows... Figure 6As shown, in the ISIGHT integrated platform, based on the automation framework composed of Simcode components, the Optimization component and additional Simcode components are dragged in to build a complete local strength and durability optimization process. Figure 7 As shown, the process may include the following steps: Setting design variables: The activation state parameters of the weld point set F01~FXX to be optimized are used as design variables. Each weld point state parameter is a two-level discrete variable, with a level value of "1" indicating the presence of the weld point and a level value of "0" indicating its absence. Setting up cascaded solver operation: Two sets of Simcode components are configured in the optimization process to call different solvers. The Simcode component is used to trigger the ABAQUS solver operation, submitting the target local region model under the current weld point configuration to the ABAQUS solver for finite element calculation, generating an ODB result file DOOR_F.odb containing stress and strain information. The Simcode component is used to trigger the FEMFAT solver operation, reading the DOOR_F.odb file generated by the first Simcode component, calling the FEMFAT fatigue analysis solver to perform fatigue calculation, and outputting a fatigue analysis result detection file DOOR_F.pro, which contains fatigue damage values ​​of the locally highly loaded region. Setting the optimization algorithm and iterative loop: Preferably, the NSGA-II multi-objective genetic algorithm is selected as the optimization algorithm, and the optimization process is started. The optimization algorithm, based on the current weld point configuration (a set of 0 / 1 combinations of F01~FXX), sequentially drives the ABAQUS solver for finite element calculations and the FEMFAT solver for fatigue analysis, extracting fatigue damage from the DOOR_F.pro file. The algorithm evaluates the quality of the current weld point configuration based on the calculated fatigue damage values ​​and the degree to which preset constraints are met. Based on the evaluation results, the algorithm generates a new generation of weld point configurations through crossover and mutation operations, and submits them again to the Simcode component for the next round of iterative calculations.

[0062] Through the above iterative cycle, the optimization algorithm automatically searches the design space of solder joint state parameters, continuously generates new solder joint combinations and evaluates their fatigue performance until the preset convergence condition is met or the maximum number of iterations is reached.

[0063] Finally, the second analysis results are filtered based on the second preset constraints and load application information to obtain the second weld point optimization results for the vehicle body opening and closing components. Specifically, the second analysis results are filtered and evaluated based on the second preset constraints and load application information, and the optimal solution is selected from the weld point configuration schemes that meet the constraints as the second weld point optimization result. The second preset constraints can be calibrated according to the performance design indicators of the actual vehicle model, such as the upper limit of fatigue damage value in a local area and the upper limit of the number of weld points.

[0064] In some embodiments of this application, a parameterized model of solder joints is performed on a local region model to obtain a target local region model. This includes: identifying the loaded components in the local region model and applying a preset load to the loaded components, wherein the load direction of the preset load is the same as the load direction of the loaded components; identifying the set of solder joints to be optimized in the local region model, obtaining parameter information corresponding to each solder joint in the set, and constructing a first solder joint model and a second solder joint model corresponding to each solder joint based on the parameter information; defining keywords for the first solder joint model and the second solder joint model respectively to obtain the target local region model. The preset load can be calibrated according to actual conditions.

[0065] Specifically, the weld points to be optimized in the local region model are parameterized, and each weld point is set as a parameter variable that can be controlled by the optimization algorithm and has two states: "existence" and "non-existence". This constructs a target local region model that can change the activation state of the weld points according to different parameter configurations. Preferably, the local region model is modeled using a parameterized weld point model to obtain the target local region model, which may include the following steps: First, the loaded components in the local region model are identified, and a preset load is applied to the loaded components. The load direction of the preset load is the same as the load direction of the loaded components under actual working conditions. The specific value of the preset load can be calibrated according to the performance design indicators of the actual vehicle model. For example, the maximum load of historically developed vehicles within the organization under the same working conditions can be extracted as the preset load value. Second, the set of weld points to be optimized in the local region model is identified, and the parameter information corresponding to each weld point in the set is obtained. To distinguish it from the weld point set in the first aspect of stiffness optimization, the weld points to be optimized in the local high-load region can be named F01~FXX. Third, a first weld point model and a second weld point model corresponding to each weld point are constructed based on the parameter information. The first weld point model is a valid weld point file containing complete weld point definitions (such as node information, element information, attribute information, material information, and connection information with the vehicle body), corresponding to the state of "this weld point exists". The second weld point model is an empty information file containing no weld point definitions, corresponding to the state of "this weld point does not exist". Finally, keywords are defined for the first and second weld point models respectively to obtain the target local region model. Specifically, in the main model file of the local region, the file corresponding to each weld point is associated with keywords (such as *include), and the call path of this keyword is parameterized, thereby completing the construction of the target local region model.

[0066] In some embodiments of this application, the load application information includes the minimum value of the extreme damage value of the base material near the loaded component. The second analysis result is screened based on the second preset constraint and the load application information to obtain the second weld point optimization result of the vehicle body opening and closing component. This includes: obtaining the fatigue damage value of the first weld point model and the second weld point model corresponding to each weld point in the weld point set based on the second analysis result, and taking the minimum value as the upper limit value of the damage optimization target; determining the target weld point from the weld point set according to the fatigue damage value and the upper limit value, and generating the second weld point optimization result based on the target weld point.

[0067] Specifically, firstly, based on the second analysis results, the fatigue damage values ​​of the first and second solder joint models corresponding to each solder joint in the solder joint set are obtained. The first solder joint model corresponds to the state where the solder joint exists, and the second solder joint model corresponds to the state where the solder joint does not exist. By comparing the fatigue damage response of the local area under the two states, the contribution of each solder joint to fatigue performance can be evaluated.

[0068] Then, the lowest value of the extreme damage value of the base material near the loaded component is taken as the upper limit of the damage optimization target. This upper limit is a benchmark value obtained by fatigue analysis of historically developed models within the organization under the same working conditions, representing the maximum allowable damage value of this local area while meeting durability performance requirements.

[0069] Next, based on the fatigue damage value and the upper limit value, the target weld point is determined from the weld point set. Specifically, during the optimization iteration process, after calculating a set of fatigue damage values ​​in each iteration, the optimization algorithm automatically determines whether the fatigue damage value of the current weld point configuration is lower than or equal to the preset upper limit value. If the fatigue damage value of the current weld point configuration is lower than or equal to the upper limit value, the weld point configuration is marked as a feasible solution and included in the candidate solution set. If the fatigue damage value of the current weld point configuration is higher than the upper limit value, it is marked as an infeasible solution and directly eliminated, not entering the candidate solution set. Finally, a second weld point optimization result is generated based on the target weld point. After the iteration is completed, a set of feasible solutions is selected from the candidate solution set as the optimal solution for multi-objective optimization. This optimal solution gives the state value combination of the state parameters F01~FXX of all weld points in the weld point group to be optimized, where "1" indicates that the weld point is retained and "0" indicates that the weld point is removed. Based on design experience, the optimal solution is identified and confirmed to obtain the final second weld point optimization result. This optimization result achieves the simplification of the number of weld points and the rationalization of the layout while meeting the local strength and durability performance requirements.

[0070] In some embodiments of this application, the target weld point optimization result of the vehicle body opening and closing component is generated based on the first weld point optimization result and the second weld point optimization result.

[0071] Specifically, the optimization results of the first weld point and the optimization results of the second weld point are integrated to form the target weld point optimization results of the body opening and closing parts that take into account both rigidity and durability.

[0072] In one embodiment of this application, taking a car door as an example, firstly, the optimization results of the first weld point and the optimization results of the second weld point are superimposed and fused. The first weld point optimization result provides the optimal weld point configuration that satisfies the overall multi-stiffness performance indicators, that is, under the premise that multiple stiffness performances such as vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline meet the standards, the weld point layout scheme with the simplest number of weld points is achieved. The second weld point optimization result provides the optimal weld point configuration that satisfies the local strength and durability performance indicators, that is, under harsh working conditions such as excessive opening of the limiter, under the premise that the fatigue damage value of the local area is lower than the preset upper limit value, the weld point layout scheme with the simplest number of weld points and the most reasonable layout is achieved.

[0073] Then, the weld point configuration scheme after superposition and fusion is subjected to consistency coordination processing. Weld points that exist in both the first and second weld point optimization results are retained. For weld points that exist only in one of the optimization results, a trade-off evaluation is conducted based on the specific location of the weld point and its comprehensive impact on stiffness and durability to determine whether to retain it.

[0074] Next, the integrated and coordinated weld point configuration scheme was applied to the complete vehicle door model to perform a full-system closure durability analysis and verification. The definition of door closure durability can be as follows: Figure 8 As shown, the weld point configuration corresponding to the optimized target weld point is applied to the complete door model to simulate the stress state of the door at the moment of closing, perform fatigue durability analysis, and evaluate the fatigue life in the final closed state. If durability risks are found in local areas, appropriate fine-tuning is made according to the analysis results until the closing durability performance requirements are met.

[0075] Finally, a comprehensive evaluation of other necessary performance aspects is conducted on the weld point design scheme that has undergone durability verification. These other necessary performance aspects may include, but are not limited to, crash safety performance, noise and vibration performance, and process feasibility. Based on the evaluation results of each performance aspect, the weld point configuration is fine-tuned to determine the final weld point design scheme for the vehicle body opening and closing components.

[0076] Through the above steps, the optimized target weld points for the vehicle body opening and closing components are obtained, taking into account both overall stiffness and local strength and durability. This optimization, while meeting all performance indicators, reduces the number of weld points and rationalizes their layout, effectively lowering manufacturing costs and improving production efficiency.

[0077] As a specific embodiment of this application, such as Figure 9 As shown, the method for optimizing weld points of vehicle body opening and closing components may include the following steps: S101, finite element modeling of the vehicle body opening and closing parts is performed based on preset weld point parameters to obtain the vehicle body opening and closing part model.

[0078] S102, perform parametric modeling of weld points on the vehicle body opening and closing component model to obtain the target vehicle body opening and closing component model.

[0079] S103, run calculations on the target vehicle body opening and closing component model to obtain the first simulation calculation result of the vehicle body opening and closing component, wherein the first simulation calculation result includes the first weld point information file.

[0080] S104, Build a first integrated analysis framework and input the first simulation calculation result into the first integrated analysis framework to define the activation state parameters of the solder joints in the first solder joint information file through the first integrated analysis framework.

[0081] S105, within the first integrated analysis framework, the first simulation calculation results are solved and run according to the first preset analysis strategy and activation state parameters to obtain the first analysis results of the vehicle body opening and closing components.

[0082] S106, the first analysis result is screened based on the first preset constraint conditions to obtain the first weld point optimization result of the vehicle body opening and closing component.

[0083] S107, determine the local high load area of ​​the vehicle body opening and closing parts, and obtain the weld point parameters corresponding to the local high load area.

[0084] S108, finite element modeling of the local high-load area is performed based on the weld point parameters to obtain the local area model of the vehicle body opening and closing parts.

[0085] S109, Perform parametric modeling of weld points on the local area model to obtain the target local area model.

[0086] S110, run calculations on the target local area model to obtain the second simulation calculation results of the vehicle body opening and closing parts, wherein the second simulation calculation results include the second weld point information file and load application information.

[0087] S111, Build a second integrated analysis framework and input the second simulation results into the second integrated analysis framework to define the activation state parameters of the solder joints in the second solder joint information file through the second integrated analysis framework.

[0088] S112, within the second integrated analysis framework, the second simulation calculation results are solved and run according to the activation state parameters to obtain the second analysis results of the vehicle body opening and closing components.

[0089] S113, the second analysis results are screened based on the second preset constraint conditions and load application information to obtain the second weld point optimization results of the vehicle body opening and closing parts.

[0090] S114, Based on the optimization results of the first weld point and the second weld point, generate the target weld point optimization results for the vehicle body opening and closing components.

[0091] In summary, the body opening and closing component weld point optimization method according to the embodiments of this application firstly performs finite element modeling of the body opening and closing component based on preset weld point parameters to obtain a body opening and closing component model. Then, it performs weld point parameterization modeling on the body opening and closing component model to obtain a target body opening and closing component model. Next, it performs calculations on the target body opening and closing component model to obtain a first simulation calculation result of the body opening and closing component. The first simulation calculation result includes a first weld point information file. Then, it builds a first integrated analysis framework and inputs the first simulation calculation result into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file. Then, within the first integrated analysis framework, it solves and runs the first simulation calculation result according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the body opening and closing component. Finally, it performs screening processing on the first analysis result based on a first preset constraint condition to obtain the first weld point optimization result of the body opening and closing component. Therefore, by using parametric modeling and multi-objective optimization, redundant solder joints can be removed and local layouts optimized. Under the premise of meeting stiffness and durability requirements, the number of solder joints can be reduced and the layout optimized, thereby reducing manufacturing costs and improving production efficiency.

[0092] Corresponding to the above embodiments, this application also proposes a device for optimizing weld points of vehicle body opening and closing components.

[0093] like Figure 10 As shown, the vehicle body opening and closing component weld point optimization device 200 of this application embodiment includes: a first modeling module 210, a second modeling module 220, a calculation module 230, a definition module 240, a solution module 250 and a processing module 260.

[0094] The system comprises the following modules: a first modeling module 210, used for finite element modeling of the vehicle body opening and closing component based on preset weld point parameters to obtain a vehicle body opening and closing component model; a second modeling module 220, used for parameterized modeling of the weld points in the vehicle body opening and closing component model to obtain a target vehicle body opening and closing component model; a calculation module 230, used for running calculations on the target vehicle body opening and closing component model to obtain a first simulation calculation result of the vehicle body opening and closing component, wherein the first simulation calculation result includes a first weld point information file; a definition module 240, used for building a first integrated analysis framework and inputting the first simulation calculation result into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file through the first integrated analysis framework; a solution module 250, used for solving the first simulation calculation result within the first integrated analysis framework according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the vehicle body opening and closing component; and a processing module 260, used for filtering the first analysis result based on a first preset constraint condition to obtain a first weld point optimization result of the vehicle body opening and closing component.

[0095] According to one embodiment of this application, the second modeling module 220 is further used to perform weld point parameterization modeling on the vehicle body opening and closing component model to obtain the target vehicle body opening and closing component model, including: determining the set of weld points to be optimized in the vehicle body opening and closing component model, obtaining the parameter information corresponding to each weld point in the weld point set, and constructing a first weld point model and a second weld point model corresponding to each weld point according to the parameter information; defining keywords for the first weld point model and the second weld point model respectively to obtain the target vehicle body opening and closing component model.

[0096] According to one embodiment of this application, when the vehicle body opening and closing component is a door, the first analysis result includes vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline. The first preset constraint condition includes one or more of the following: vertical stiffness constraint condition, front point stiffness constraint condition of the window frame, rear point stiffness constraint condition of the window frame, inner point stiffness constraint condition of the waistline, and outer point stiffness constraint condition of the waistline.

[0097] According to one embodiment of this application, the vehicle body opening and closing component weld point optimization device 200 further includes an acquisition module for determining the local high load area of ​​the vehicle body opening and closing component and acquiring the weld point parameters corresponding to the local high load area.

[0098] According to one embodiment of this application, the vehicle body opening and closing component weld point optimization device 200 further includes a third modeling module, which is used to perform finite element modeling of the local high-load area based on the weld point parameters to obtain a local area model of the vehicle body opening and closing component.

[0099] According to one embodiment of this application, the body opening and closing component weld point optimization device 200 further includes a fourth modeling module, which is used to perform weld point parametric modeling on a local area model to obtain a target local area model.

[0100] According to one embodiment of this application, the vehicle body opening and closing component weld point optimization device 200 further includes a second calculation module for performing calculations on the target local area model to obtain a second simulation calculation result of the vehicle body opening and closing component, wherein the second simulation calculation result includes a second weld point information file and load application information.

[0101] According to one embodiment of this application, the body opening and closing component weld point optimization device 200 further includes a second definition module, which is used to build a second integrated analysis framework and input the second simulation calculation results into the second integrated analysis framework so as to define the activation state parameters of the weld points in the second weld point information file through the second integrated analysis framework.

[0102] According to one embodiment of this application, the vehicle body opening and closing component weld point optimization device 200 further includes a second solving module, which is used to solve and run the second simulation calculation results according to the activation state parameters within the second integrated analysis framework to obtain the second analysis result of the vehicle body opening and closing component.

[0103] According to one embodiment of this application, the body opening and closing component weld point optimization device 200 further includes a second processing module for screening the second analysis results based on the second preset constraint conditions and load application information to obtain the second weld point optimization result of the body opening and closing component.

[0104] It should be noted that the above explanation of the embodiments and beneficial effects of the method for optimizing the weld points of vehicle body opening and closing parts also applies to the vehicle body opening and closing part weld point optimization device of this application. To avoid redundancy, it will not be elaborated in detail here.

[0105] In summary, the vehicle body opening and closing component weld point optimization device according to the embodiments of this application firstly performs finite element modeling of the vehicle body opening and closing component based on preset weld point parameters using a first modeling module to obtain a vehicle body opening and closing component model. Then, a second modeling module performs parameterized modeling of the weld points on the vehicle body opening and closing component model to obtain a target vehicle body opening and closing component model. Next, a calculation module performs calculations on the target vehicle body opening and closing component model to obtain a first simulation calculation result of the vehicle body opening and closing component. The first simulation calculation result includes a first weld point information file. Then, a first integrated analysis framework is built using a definition module, and the first simulation calculation result is input into the first integrated analysis framework to define the activation state parameters of the weld points in the first weld point information file. Then, a solution module solves the first simulation calculation result within the first integrated analysis framework according to a first preset analysis strategy and activation state parameters to obtain a first analysis result of the vehicle body opening and closing component. Finally, a processing module performs screening processing on the first analysis result based on a first preset constraint condition to obtain the first weld point optimization result of the vehicle body opening and closing component. Therefore, by using parametric modeling and multi-objective optimization, redundant solder joints can be removed and local layouts optimized. Under the premise of meeting stiffness and durability requirements, the number of solder joints can be reduced and the layout optimized, thereby reducing manufacturing costs and improving production efficiency.

[0106] Corresponding to the above embodiments, this application also proposes an electronic device.

[0107] like Figure 11 As shown, the electronic device 300 of this application embodiment includes a memory 310, a processor 320, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement any of the above-mentioned methods for optimizing weld points of vehicle body opening and closing components.

[0108] According to the embodiments of this application, when the processor executes the computer program, the electronic device implements any of the above-mentioned methods for optimizing weld points of body opening and closing parts. It achieves the removal of redundant weld points and optimization of local arrangement through parametric modeling and multi-objective optimization. Under the premise of satisfying rigidity and durability performance, it reduces the number of weld points and optimizes the layout, thereby reducing manufacturing costs and improving production efficiency.

[0109] Corresponding to the above embodiments, this application also proposes a computer-readable storage medium.

[0110] The computer-readable storage medium of this application embodiment stores a computer program that is executed by a processor to implement any of the above-described methods for optimizing weld points of vehicle body opening and closing components.

[0111] According to the embodiments of this application, a computer-readable storage medium storing a computer program thereon implements any of the above-mentioned methods for optimizing weld points of vehicle body opening and closing components when executed by a processor. This method achieves the removal of redundant weld points and optimization of local layout through parametric modeling and multi-objective optimization. Under the premise of satisfying rigidity and durability performance, it reduces the number of weld points and optimizes the layout, thereby reducing manufacturing costs and improving production efficiency.

[0112] Specifically, in the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0114] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for optimizing weld points of vehicle body opening and closing components, characterized in that, include: Finite element modeling of the vehicle body opening and closing components is performed based on preset weld point parameters to obtain the vehicle body opening and closing component model. The weld point parametric model is modeled on the vehicle body opening and closing component model to obtain the target vehicle body opening and closing component model; The target vehicle body opening and closing component model is run and calculated to obtain the first simulation calculation result of the vehicle body opening and closing component, wherein the first simulation calculation result includes the first weld point information file; A first integrated analysis framework is built, and the first simulation calculation results are input into the first integrated analysis framework so as to define the activation state parameters of the solder joints in the first solder joint information file through the first integrated analysis framework. Within the first integrated analysis framework, the first simulation results are solved and run according to the first preset analysis strategy and the activation state parameters to obtain the first analysis result of the vehicle body opening and closing component. The first analysis results are sieved based on the first preset constraints to obtain the first weld point optimization result of the vehicle body opening and closing component.

2. The method for optimizing weld points of vehicle body opening and closing components according to claim 1, characterized in that, The step of performing weld point parametric modeling on the vehicle body opening / closing component model to obtain the target vehicle body opening / closing component model includes: The set of weld points to be optimized in the vehicle body opening and closing component model is determined, and the parameter information corresponding to each weld point in the set is obtained. Based on the parameter information, the first weld point model and the second weld point model corresponding to each weld point are constructed. Keyword definitions are performed on the first weld point model and the second weld point model respectively to obtain the target vehicle body opening and closing component model.

3. The method for optimizing weld points of vehicle body opening and closing components according to claim 2, characterized in that, When the vehicle body opening and closing component is a door, the first analysis result includes vertical stiffness, front point stiffness of the window frame, rear point stiffness of the window frame, inner point stiffness of the waistline, and outer point stiffness of the waistline. The first preset constraint condition includes one or more of the following: vertical stiffness constraint condition, front point stiffness constraint condition of the window frame, rear point stiffness constraint condition of the window frame, inner point stiffness constraint condition of the waistline, and outer point stiffness constraint condition of the waistline.

4. The method for optimizing weld points of vehicle body opening and closing components according to claim 1, characterized in that, Also includes: Identify the local high-load area of ​​the vehicle body opening and closing component, and obtain the weld point parameters corresponding to the local high-load area; Based on the weld point parameters, finite element modeling of the local high-load area is performed to obtain the local area model of the vehicle body opening and closing component. The local region model is modeled using a parametric model of the weld points to obtain the target local region model; The target local area model is run for calculation to obtain the second simulation calculation result of the vehicle body opening and closing component, wherein the second simulation calculation result includes a second weld point information file and load application information; A second integrated analysis framework is built, and the second simulation result is input into the second integrated analysis framework so as to define the activation state parameters of the solder joints in the second solder joint information file through the second integrated analysis framework; Within the second integrated analysis framework, the second simulation results are solved and run according to the activation state parameters to obtain the second analysis results of the vehicle body opening and closing components; The second analysis result is sieved based on the second preset constraint and the load application information to obtain the second weld point optimization result of the vehicle body opening and closing component.

5. The method for optimizing weld points of vehicle body opening and closing components according to claim 4, characterized in that, The step of performing weld point parametric modeling on the local region model to obtain the target local region model includes: Identify the loaded components in the local region model and apply a preset load to the loaded components, wherein the load direction of the preset load is the same as the load direction of the loaded components; The set of solder joints to be optimized in the local region model is determined, and the parameter information corresponding to each solder joint in the set is obtained. Based on the parameter information, a first solder joint model and a second solder joint model corresponding to each solder joint are constructed. Keyword definitions are performed on the first solder joint model and the second solder joint model respectively to obtain the target local region model.

6. The method for optimizing weld points of vehicle body opening and closing components according to claim 4, characterized in that, The load application information includes the minimum value of the extreme damage value of the base material near the loaded component. The process of filtering the second analysis results based on the second preset constraint conditions and the load application information to obtain the second weld point optimization result of the vehicle body opening / closing component includes: Based on the second analysis results, the fatigue damage values ​​of the first and second weld point models corresponding to each weld point in the weld point set are obtained, and the minimum value is used as the upper limit of the damage optimization target. Based on the fatigue damage value and the upper limit value, a target solder joint is determined from the solder joint set, and the second solder joint optimization result is generated based on the target solder joint.

7. The method for optimizing weld points of vehicle body opening and closing components according to claim 4, characterized in that, Also includes: Based on the first weld point optimization result and the second weld point optimization result, the target weld point optimization result of the vehicle body opening and closing component is generated.

8. A device for optimizing weld points of vehicle body opening and closing components, characterized in that, include: The first modeling module is used to perform finite element modeling of the vehicle body opening and closing parts based on preset weld point parameters, so as to obtain the vehicle body opening and closing part model. The second modeling module is used to perform weld point parametric modeling on the vehicle body opening and closing component model to obtain the target vehicle body opening and closing component model. The calculation module is used to perform calculations on the target vehicle body opening and closing component model to obtain the first simulation calculation result of the vehicle body opening and closing component, wherein the first simulation calculation result includes a first weld point information file; A definition module is used to build a first integrated analysis framework and input the first simulation calculation results into the first integrated analysis framework, so as to define the activation state parameters of the solder joints in the first solder joint information file through the first integrated analysis framework. The solution module is used to solve the first simulation calculation result within the first integrated analysis framework according to the first preset analysis strategy and the activation state parameters, so as to obtain the first analysis result of the vehicle body opening and closing component. The processing module is used to perform screening processing on the first analysis result based on the first preset constraint conditions to obtain the first weld point optimization result of the vehicle body opening and closing component.

9. An electronic device, characterized in that, include: The memory, the processor, and the computer program stored in the memory and executable on the processor, the processor executing the program to implement the body opening and closing component weld point optimization method as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the body opening and closing component weld point optimization method as described in any one of claims 1-7.

Images