Vehicle body outer covering part rigidity simulation and optimization method, device and equipment and storage medium

Abstract

The invention discloses a vehicle body outer covering part rigidity simulation and optimization method, device and equipment and a storage medium, relates to the technical field of vehicle body outer covering part vehicle body manufacturing processes, and discloses a vehicle body outer covering part rigidity simulation and optimization method which comprises the steps that initial data of a vehicle body outer covering part are obtained, gravity simulation is carried out according to the initial data, and a gravity simulation result is obtained; obtaining a gravity simulation result digital model; performing full-process simulation according to the gravity simulation result digital model to obtain full-process simulation result data; and performing gravity simulation according to the full-process simulation result data to obtain rigid simulation and optimization results. Through the technical means of obtaining initial data of the vehicle body outer covering part, sequentially carrying out gravity simulation and full-process simulation, and carrying out gravity simulation again, accurate evaluation and optimization of the rigidity of the vehicle body outer covering part are realized, so that the performance and reliability of the vehicle body outer covering part in actual use are improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile body outer covering parts manufacturing process, and in particular to a method, device, equipment and storage medium for rigidity simulation and optimization of automobile body outer covering parts. Background Art

[0002] With the continuous development of new energy vehicles, the demand for automobile space is increasing. The automobile body is designed with large space according to the demand. As cold stamping parts, automobile outer covering parts are also accompanied by the risk of insufficient rigidity when they become larger. For example, the outer panel of the engine hood will cause the internal surface to collapse when the rigidity is insufficient, affecting the appearance quality. For example, the sunroof cover will collapse due to insufficient rigidity, causing dimensional deviation, affecting the welding matching relationship with the side wall and the internal lap reinforcement of the sunroof cover, and there are many risks such as desoldering and baking deformation. Due to insufficient rigidity, the whole chain of vehicle development projects will be reworked, the project progress will be delayed, and the cost of manpower and material resources will be wasted.

[0003] However, the problem of insufficient rigidity of the outer cover is related to the entire chain from styling design, product design to process. The rigidity of the outer cover is only analyzed from the results of the drawing process, and the rigidity of the product is not analyzed from the perspective of product design characteristics. In the stamping production process, the quality confirmation of the outer cover parts is often judged based on the final process results. Only the rigidity of the drawing process results is analyzed, and the influence of stress release after trimming and flanging on the rigidity of the parts is not analyzed. Even if the rigidity of the drawing process results meets the requirements, the final result of the stamping process may still have the problem of insufficient rigidity.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of this application is to provide a method, device, equipment and storage medium for simulating and optimizing the rigidity of vehicle body exterior covering parts, aiming to solve the technical problem that the rigidity of parts cannot be analyzed from the perspective of product design characteristics and the final results of the stamping process.

[0006] To achieve the above objectives, the present application proposes a method for simulating and optimizing the rigidity of a vehicle body outer covering, the method comprising:

[0007] Acquiring initial data of the vehicle body outer covering, performing gravity simulation according to the initial data, and obtaining a digital model of the gravity simulation result;

[0008] Perform full process simulation according to the gravity simulation result digital model to obtain full process simulation result data;

[0009] A gravity simulation is performed based on the simulation result data of the entire process to obtain rigidity simulation and optimization results.

[0010] In one embodiment, the steps of acquiring initial data of the vehicle body outer covering, performing gravity simulation according to the initial data, and obtaining a digital model of the gravity simulation result include:

[0011] Acquiring initial data of the vehicle body outer covering, and obtaining an initial product digital model of the vehicle body outer covering according to the initial data;

[0012] Performing gravity simulation according to the initial product digital model to obtain an initial gravity simulation result;

[0013] The initial product digital model is optimized according to the initial gravity simulation result to obtain an initial optimization result, and a gravity simulation result digital model is obtained according to the initial optimization result.

[0014] In one embodiment, the step of performing gravity simulation according to the initial product digital model to obtain an initial gravity simulation result comprises:

[0015] Obtaining a preset time period for gravity simulation, preset gravity magnitude, and selecting a gravity direction according to the direction of the initial product digital model;

[0016] Selecting the lowest point of the initial product digital model relative to the ground in the simulation environment, and obtaining a ground digital model based on the lowest point;

[0017] Selecting a position of the initial product digital model relative to the inspection fixture in the simulation environment, and obtaining the inspection fixture digital model according to the position;

[0018] Performing gravity simulation on the ground digital model and the inspection fixture digital model respectively according to the preset time period, the preset gravity magnitude, and the gravity direction, to obtain gravity simulation results of the ground digital model and gravity simulation results of the inspection fixture digital model;

[0019] An initial gravity simulation result is obtained according to the gravity simulation result of the ground digital model and the gravity simulation result of the inspection fixture digital model.

[0020] In one embodiment, the initial product digital model is optimized according to the initial gravity simulation result to obtain an initial optimization result, and the step of obtaining the gravity simulation result digital model according to the initial optimization result includes:

[0021] Analyze whether there is deformation according to the initial gravity simulation result to obtain an initial analysis result;

[0022] When the initial analysis result shows that deformation exists, the initial displacement of the initial product digital model in a preset direction is obtained, and the appearance surface curvature and modeling structure of the initial product digital model are adjusted according to the initial displacement to obtain an initial optimization result.

[0023] In one embodiment, the step of performing gravity simulation according to the full process simulation result data to obtain rigidity simulation and optimization results includes:

[0024] Acquiring material data of the vehicle body outer covering part, and obtaining a target product digital model of the vehicle body outer covering part according to the material data and the whole process simulation result data;

[0025] Performing gravity simulation according to the target product digital model to obtain a target gravity simulation result;

[0026] The target product digital model is optimized according to the target gravity simulation result to obtain a target optimization result, and a rigid simulation and optimization result is obtained according to the target optimization result.

[0027] In one embodiment, the step of optimizing the target product digital model according to the target gravity simulation result to obtain a target optimization result, and obtaining a rigid simulation and optimization result according to the target optimization result comprises:

[0028] Analyze whether there is deformation according to the target gravity simulation result to obtain a target analysis result;

[0029] When the target analysis result shows that deformation exists, obtaining the target displacement of the digital model of the target product in a preset direction, and adjusting the drawing parameters of the full process simulation according to the target displacement;

[0030] The whole process is simulated according to the drawing parameters and the target product digital model to obtain the target optimization result.

[0031] In one embodiment, the step of performing full process simulation according to the gravity simulation result digital model to obtain full process simulation result data includes:

[0032] Perform drawing according to the digital model of the gravity simulation result to obtain a drawing process result;

[0033] Perform trimming according to the result of the drawing process to obtain a trimming process result;

[0034] Perform shaping according to the trimming process result to obtain a shaping process result;

[0035] Perform flanging according to the shaping process result to obtain a flanging process result;

[0036] The whole process simulation result data is obtained according to the flanging process result.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle body outer cover rigidity simulation and optimization device, the vehicle body outer cover rigidity simulation and optimization device comprising: a gravity simulation module, used to obtain initial data of the vehicle body outer cover, perform gravity simulation according to the initial data, and obtain a digital model of the gravity simulation result;

[0038] A full-process simulation module is used to perform full-process simulation according to the gravity simulation result digital model to obtain full-process simulation result data;

[0039] The gravity simulation module is also used to perform gravity simulation according to the full-process simulation result data to obtain rigidity simulation and optimization results.

[0040] In addition, to achieve the above-mentioned objectives, the present application also proposes a vehicle body outer cover rigidity simulation and optimization device, the device comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle body outer cover rigidity simulation and optimization method as described above.

[0041] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the vehicle body outer cover rigidity simulation and optimization method as described above are implemented.

[0042] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the vehicle body outer cover rigidity simulation and optimization method as described above are implemented.

[0043] One or more technical solutions proposed in this application have at least the following technical effects:

[0044] By obtaining the initial data of the outer covering parts of the vehicle body, and then performing gravity simulation based on these data to obtain a digital model of the simulation results, and then using the model to simulate the entire process to obtain the simulation result data of the entire process, and finally performing gravity simulation again based on the simulation data of the entire process to obtain the technical means of rigidity simulation and optimization results, by comprehensively considering the influence of product design characteristics and the stamping process of the entire process, the rigidity of the outer covering parts can be more accurately evaluated, and problems such as collapse and dimensional deviation caused by insufficient rigidity can be predicted and solved, thereby improving product quality, reducing rework and cost waste, and optimizing the vehicle development process. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] Figure 1 A schematic diagram of a process flow provided for the first embodiment of the method for simulating and optimizing the rigidity of the vehicle body outer covering part of the present application;

[0048] Figure 2 A flow chart of the second embodiment of the method for simulating and optimizing the rigidity of the vehicle body outer covering part of the present application;

[0049] Figure 3 A schematic diagram of a simplified process of a vehicle body outer cover rigidity simulation and optimization method provided in Example 2 of the present application;

[0050] Figure 4 This is a schematic diagram of the module structure of the vehicle body outer cover rigidity simulation and optimization device according to an embodiment of the present application;

[0051] Figure 5 Schematic diagram of the equipment structure of the hardware operating environment involved in the rigidity simulation and optimization method of the vehicle body outer cover in the embodiment of the present application.

[0052] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0054] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0055] The main solution of the embodiment of the present application is: obtaining initial data of the vehicle body outer covering, performing gravity simulation according to the initial data, and obtaining a digital model of the gravity simulation result;

[0056] Perform full process simulation according to the gravity simulation result digital model to obtain full process simulation result data;

[0057] A gravity simulation is performed based on the simulation result data of the entire process to obtain rigidity simulation and optimization results.

[0058] In this embodiment, for the convenience of description, the following description is made by taking the vehicle body outer cover rigidity simulation and optimization equipment as the execution subject.

[0059] The existing technology is unable to analyze the rigidity of parts from the perspective of product design characteristics and the final results of the stamping process.

[0060] The present application provides a solution by obtaining initial data of the outer covering parts of the vehicle body, then performing gravity simulation based on these data to obtain a digital model of the simulation results, then using the model to perform full-process simulation to obtain full-process simulation result data, and finally performing gravity simulation again based on the full-process simulation data to obtain a technical means of rigidity simulation and optimization results. By comprehensively considering the influence of product design characteristics and the full-process stamping process, the rigidity of the outer covering parts can be more accurately evaluated, and problems such as collapse and dimensional deviation caused by insufficient rigidity can be predicted and solved, thereby improving product quality, reducing rework and cost waste, and optimizing the vehicle development process.

[0061] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a vehicle body outer cover rigidity simulation and optimization device, etc. The following takes the vehicle body outer cover rigidity simulation and optimization device as an example to illustrate this embodiment and the following embodiments.

[0062] Based on this, the embodiment of the present application provides a method for simulating and optimizing the rigidity of a vehicle body outer covering. Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for simulating and optimizing the rigidity of vehicle body outer covering parts of the present application.

[0063] In this embodiment, the vehicle body outer cover rigidity simulation and optimization method includes steps S10 to S30:

[0064] Step S10, obtaining initial data of the vehicle body outer covering, performing gravity simulation according to the initial data, and obtaining a digital model of the gravity simulation result;

[0065] It should be noted that obtaining the initial data of the vehicle body exterior covering usually refers to the basic information of the product during the design stage, including size, shape, material properties, etc.

[0066] In addition, it should be noted that gravity simulation refers to the simulation of the mechanical behavior of a product under external forces, especially gravity, in computer simulation software in order to evaluate the structural response of the product under static loads, such as stress, strain and displacement.

[0067] In addition, it should be noted that the digital model of gravity simulation results is a digital model generated after gravity simulation. The model reflects the actual or expected performance of the product under the action of external forces. The digital model of gravity simulation results contains all the data and analysis results collected during the simulation process and can be used for further evaluation and optimization.

[0068] Step S20, performing full process simulation according to the gravity simulation result digital model to obtain full process simulation result data;

[0069] It should be noted that full process simulation refers to simulating all key steps in the entire manufacturing process of the product, including but not limited to drawing, trimming, shaping, flanging, etc. The purpose of full process simulation is to evaluate the performance of the product in the complete manufacturing process to ensure that the final product meets the design and functional requirements.

[0070] In addition, it should be noted that the full-process simulation result data is the data obtained after completing the full-process simulation. These data reflect the performance and final quality of the product in each manufacturing process.

[0071] Step S30, performing gravity simulation according to the full-process simulation result data to obtain rigidity simulation and optimization results.

[0072] It is understood that performing gravity simulation based on the full process simulation result data means performing gravity simulation again, but this time based on the molding result data after the full process simulation. The purpose is to evaluate the response of the product to gravity in the final state.

[0073] It should be noted that the rigidity simulation and optimization results are based on the results of gravity simulation and optimization. Optimization means evaluating the rigidity performance of the product and performing necessary structural optimization based on the results to ensure that the product meets the rigidity requirements.

[0074] In a feasible implementation, step S10 may include steps S11 to S13:

[0075] Step S11, acquiring initial data of the vehicle body outer covering, and obtaining an initial product digital model of the vehicle body outer covering according to the initial data;

[0076] It is understandable that obtaining initial data of the vehicle body outer covering part refers to collecting all original information required for the design and analysis of the vehicle body outer covering part, which usually includes geometric dimensions, shape description, material properties, manufacturing process requirements, etc.

[0077] In addition, it can be understood that, according to the initial data, obtaining the initial product digital model of the vehicle body outer cover is divided into digital model preparation and import, material definition, section definition, implicit analysis overview setting and load definition, and the specific steps are:

[0078] Digital model preparation and import: adjust the direction of the digital model of the product to be analyzed in the 3D software so that the digital model can be placed horizontally on a plane, import the product digital model into the simulation analysis software, perform 2D mesh division, select SHELL as the unit type, divide the product digital model into triangular / quadrilateral unit meshes, and the unit mesh size cannot be less than one-third of the material thickness of the product digital model;

[0079] Material definition: Assign product definition materials to this numerical model, such as elastic modulus and Poisson's ratio;

[0080] Section definition: Create new section information, define the section type as SECTION_SHELL, set the section thickness to the product digital model thickness, and assign the section information to the digital model;

[0081] Implicit analysis overview settings, in the overview, define the product model as the reference surface, select the material assigned to the product model, and select the section assigned to the product model;

[0082] Load definition: define the load that the product digital model needs to bear in the load, gravity setting, select LOAD_BODY, define the gravity that the product digital model itself is subjected to, including setting the gravity acceleration and direction of action.

[0083] Step S12, performing gravity simulation according to the initial product digital model to obtain an initial gravity simulation result;

[0084] It should be noted that the initial gravity simulation results refer to the data obtained after the simulation analysis is completed. These data reflect the performance of the product when it is only subject to gravity.

[0085] It can be understood that the gravity simulation is performed based on the initial product digital model to obtain the initial gravity simulation result, which represents the stress and strain of the digital model structure of the analyzed product under the action of gravity.

[0086] Step S13, optimizing the initial product digital model according to the initial gravity simulation result to obtain an initial optimization result, and obtaining a gravity simulation result digital model according to the initial optimization result.

[0087] It is understood that based on the initial gravity simulation results, the performance of the product is analyzed to identify areas that need improvement, such as stress concentration areas, excessive deformation, or areas that do not meet rigidity requirements. Based on the identified areas that need improvement, the product digital model is adjusted, which may include modifying the geometry, increasing material thickness, reinforcing rib design, or other structural improvements to improve the rigidity of the product.

[0088] In a feasible implementation, step S12 may include steps S121 to S125:

[0089] Step S121, obtaining a preset time period for gravity simulation, preset gravity magnitude, and selecting a gravity direction according to the direction of the initial product digital model;

[0090] It should be noted that the preset time period of gravity simulation refers to the length of time considered in the simulation analysis, that is, the time period for the simulation software to simulate the effect of gravity. The size of the preset time period needs to ensure that all relevant responses of the product under continuous gravity can be captured. This embodiment does not impose specific restrictions on the size of the preset time period.

[0091] It can be understood that the preset time period of the gravity simulation is set as follows: two time points are set, and the time length needs to ensure that the simulation time is within the time length to ensure that the product digital model continues to withstand gravity during the simulation process.

[0092] In addition, it should be noted that the preset gravity magnitude refers to the gravity acceleration magnitude used in setting the simulation, which is usually based on the standard gravity acceleration. The gravity magnitude directly affects the force applied to the product, thereby affecting its stress, displacement and other responses. In this embodiment, the preset gravity magnitude is 9800 mm / s2.

[0093] It should be noted that the direction of gravity is the direction of gravity that the product digital model is continuously subjected to, and it needs to be set according to the direction in which the product digital model is placed in the simulation space, because gravity always acts in the vertical downward direction.

[0094] Step S122, selecting the lowest point of the initial product digital model relative to the ground in the simulation environment, and obtaining a ground digital model according to the lowest point;

[0095] It should be noted that the lowest point refers to the lowest position where the product contacts the ground when placed in a simulation environment, which usually refers to the lowest point of the product's geometric shape.

[0096] It can be understood that the ground digital model is obtained according to the lowest point as follows: the product is set to be stationary on the ground, the boundary definition is selected, the definition type is BOUNDARY_SPC_NODE, and the unit grid of the lowest point of the product digital model is selected. This position is the support point when the product digital model is placed on a horizontal plane. At least 4 points must be guaranteed to ensure the balance of the product digital model when it is on a horizontal plane, and all degrees of freedom of the selected 4 grid nodes are constrained.

[0097] In addition, it should be noted that the ground digital model is the digital model of the initial product digital model after it is balanced in the simulation environment, and gravity simulation will be performed based on the ground digital model later.

[0098] Step S123, selecting the position of the initial product digital model relative to the inspection fixture in the simulation environment, and obtaining the inspection fixture digital model according to the position;

[0099] It should be noted that during product manufacturing and quality inspection, the gauge is a tool used to determine whether the geometric features of the product meet the design requirements. The position of the initial product digital model relative to the gauge in the simulation environment refers to the relative placement or contact position of the product digital model with the gauge in the simulation.

[0100] It can be understood that the digital model of the gauge is obtained according to the position of the initial product digital model relative to the gauge in the simulation environment. Specifically, the product is placed in the gauge state setting, the boundary definition is selected, the definition type is BOUNDARY_SPC_NODE, the grid node on the product digital model is selected according to the GD&T definition of the clamping position, and the degree of freedom of the clamping position node is constrained according to the GD&T definition.

[0101] GD&T (Geometric Dimensioning and Tolerancing) is an international standard used in engineering drawings and related technical documents to specify geometric features such as part size, shape, orientation and position and their tolerances.

[0102] In addition, it should be noted that the digital model of the gauge is a digital model of the initial product digital model after the position relative to the gauge in the simulation environment remains stable, and gravity simulation will be performed based on the digital model of the gauge subsequently.

[0103] Step S124, performing gravity simulation on the ground digital model and the inspection fixture digital model respectively according to the preset time period, the preset gravity magnitude, and the gravity direction, to obtain gravity simulation results of the ground digital model and gravity simulation results of the inspection fixture digital model;

[0104] It can be understood that gravity simulation is performed on the ground digital model and the gauge digital model according to the preset time period, the preset gravity magnitude and the gravity direction, which means that after setting the material parameters, section parameters, load and boundary definition, the product digital model rigid simulation modeling is completed, and the ground digital model and the gauge digital model are obtained. According to the ground digital model and the gauge digital model, an implicit solver is selected to submit the calculation, and the stress and strain of the ground digital model and the gauge digital model under the action of gravity are analyzed.

[0105] It should be noted that the gravity simulation results of the ground digital model refer to the simulation data of the ground model's support effect on the product obtained in the gravity simulation, including the stress distribution, displacement and other information of the product under ground support.

[0106] In addition, it should be noted that the gravity simulation results of the digital model of the inspection fixture refer to the simulation data of the inspection fixture model obtained in the gravity simulation on the fixing and supporting effects of the product, including the performance of the product under the support of the inspection fixture.

[0107] Step S125 , obtaining an initial gravity simulation result according to the gravity simulation result of the ground digital model and the gravity simulation result of the inspection fixture digital model.

[0108] It should be noted that the initial gravity simulation results are the overall simulation results obtained by comprehensively analyzing the gravity simulation results of the ground and the digital model of the inspection fixture. They provide a comprehensive mechanical performance evaluation of the product under different support conditions to identify the differences in the mechanical responses of the product under different working conditions, as well as possible design or structural problems.

[0109] In a feasible implementation, step S13 may include steps S131 to S132:

[0110] Step S131, analyzing whether there is deformation according to the initial gravity simulation result to obtain an initial analysis result;

[0111] It can be understood that analyzing whether deformation occurs according to the initial gravity simulation result means checking the equivalent plastic strain of the initial gravity simulation result to confirm whether plastic deformation occurs, and obtaining the initial analysis result according to the confirmed result.

[0112] Step S132, when the initial analysis result shows that deformation exists, the initial displacement of the initial product digital model in a preset direction is obtained, and the appearance surface curvature and modeling structure of the initial product digital model are adjusted according to the initial displacement to obtain an initial optimization result.

[0113] It can be understood that when the initial analysis result shows that there is deformation, the initial displacement of the initial product digital model in the preset direction is obtained, and the appearance surface curvature and the modeling structure of the initial product digital model are adjusted according to the initial displacement, and the initial optimization result is obtained to represent the Z-direction displacement of the viewing unit. For the position where the displacement exceeds the reference, the product appearance surface curvature and the product modeling structure can be adjusted to perform simulation again until the requirements are met;

[0114] In a feasible implementation, step S20 may include steps S21 to S25:

[0115] Step S21, performing drawing according to the digital model of the gravity simulation result to obtain a drawing process result;

[0116] It should be noted that drawing is the first step in the stamping process, which is the process of stretching the flat material into the desired shape. In the full process simulation, drawing is based on the digital model of gravity simulation results, simulating the process of the material being subjected to force in the drawing die and forming the designed shape.

[0117] Step S22, performing trimming according to the result of the drawing process to obtain a trimming process result;

[0118] It should be noted that the trimming process is used to remove excess material on the edge of the product after drawing, such as burrs or flash. In the full process simulation, the trimming process simulates the actual trimming operation to ensure that the product edge is neat and ready for subsequent processes.

[0119] Step S23, performing shaping according to the trimming process result to obtain a shaping process result;

[0120] It should be noted that the purpose of the shaping process is to adjust the shape of the product after drawing and trimming to ensure that the size and shape accuracy meet the design requirements. In the full process simulation, the shaping step simulates further shaping of the product to achieve the required geometric accuracy.

[0121] Step S24, flanging is performed according to the shaping process result to obtain a flanging process result;

[0122] It should be noted that the flanging process is to flip and flatten the edge of the product to form an additional edge portion, which is usually used to increase edge strength or prepare for welding. In the full process simulation, the flanging process simulates the actual flanging operation to evaluate the impact of flanging on the shape and size of the product.

[0123] Step S25, obtaining the whole process simulation result data according to the flanging process result.

[0124] It is understandable that the springback simulation and springback results of each process need to be inherited to the next process. In the stamping simulation of automobile exterior panels, the springback simulation of each process including drawing, trimming, shaping and flanging is crucial because they can predict the dimensional changes of the material after unloading due to the redistribution of internal stress; these springback results need to be accurately calculated and passed to the simulation of the next process to ensure that each consecutive stamping step can take into account the influence of the previous step, so as to achieve accurate simulation and quality control of the cumulative effect of the entire stamping process.

[0125] In addition, it can be understood that the simulation result data of the whole process obtained according to the results of the flanging process means that the simulation result data of the whole process is obtained according to the simulation results and springback results of each process. These data include stress, strain, displacement, etc. of each process, which provides a basis for evaluating the overall performance of the product and further optimization.

[0126] This embodiment solves the deformation problem that may be caused by insufficient rigidity in the design and manufacturing process of automobile exterior covers through gravity simulation, full-process stamping forming simulation, namely drawing, trimming, shaping, and flanging, and iterative optimization based on simulation results, thereby achieving the beneficial effects of improving product performance, ensuring manufacturing quality, reducing the demand for physical prototypes, reducing R&D costs, and shortening product development cycles.

[0127] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 2 The step S30 of the vehicle body outer cover rigidity simulation and optimization method further includes steps S31 to S33:

[0128] Step S31, obtaining material data of the vehicle body outer covering part, and obtaining a target product digital model of the vehicle body outer covering part according to the material data and the whole process simulation result data;

[0129] It should be noted that the material data of the vehicle body outer covering refers to the information related to the material used for the vehicle body outer covering, including but not limited to physical and chemical properties such as elastic modulus, Poisson's ratio, yield strength, and hardness.

[0130] It is understandable that when assigning the material data of the vehicle body outer covering parts to the simulation result data of the entire forming process, it is necessary to ensure that the material information is consistent with the product rigidity simulation and stamping simulation material definition.

[0131] It should be noted that the target product digital model is a new or improved product digital model created after comprehensive analysis of material data and full process simulation result data.

[0132] Step S32, performing gravity simulation according to the target product digital model to obtain a target gravity simulation result;

[0133] It is understood that gravity simulation is performed according to the target product digital model, and the target gravity simulation result is obtained, which means that gravity simulation is performed again on the digital model after comprehensive analysis of material data and full process simulation result data to verify the performance of the target product digital model under external force and ensure the reliability and safety of the product in actual application. If the target gravity simulation result indicates that the product does not meet the expected performance requirements, it may be necessary to further adjust the design or material properties and repeat the simulation process.

[0134] Step S33, optimizing the target product digital model according to the target gravity simulation result to obtain a target optimization result, and obtaining a rigid simulation and optimization result according to the target optimization result.

[0135] It can be understood that optimizing the target product digital model according to the target gravity simulation results means analyzing the performance of the product digital model according to the target gravity simulation results, and identifying areas that need improvement, such as stress concentration areas, excessive deformation or areas that do not meet rigidity requirements.

[0136] It should be noted that the target optimization result is the result of adjusting the digital model of the target product, which may include modifying the geometry, increasing material thickness, reinforcing rib design or other structural improvements to improve the rigidity of the product.

[0137] In addition, it should be noted that the rigidity simulation and optimization results represent the final results obtained by re-simulating and analyzing after the optimization is completed. This final result reflects the impact of the optimization measures on product performance and ensures that the product meets the rigidity requirements.

[0138] In a feasible implementation manner, step S33 may include steps S331 to S333:

[0139] Step S331, analyzing whether there is deformation according to the target gravity simulation result to obtain a target analysis result;

[0140] It can be understood that whether deformation occurs is analyzed based on the target gravity simulation results, and obtaining the target analysis results means checking the simulation data, especially the equivalent plastic strain and displacement, to determine whether excessive deformation or plastic deformation occurs. If plastic deformation occurs, it is necessary to evaluate the degree of deformation and the potential impact on product performance.

[0141] Step S332, when the target analysis result shows that deformation exists, obtaining the target displacement of the digital model of the target product in a preset direction, and adjusting the drawing parameters of the full process simulation according to the target displacement;

[0142] It should be noted that the target displacement refers to the displacement data of the product digital model extracted from the target gravity simulation result, especially those displacement data exceeding the preset target displacement. In this embodiment, the target displacement refers to the unit Z-direction displacement.

[0143] It can be understood that adjusting the drawing parameters of the full process simulation means adjusting the drawing process parameters in the full process simulation according to the obtained target displacement to reduce deformation. In this embodiment, adjusting the drawing parameters of the full process simulation includes but is not limited to adjusting the drawing depth, the resistance of the drawbead, etc. to control the inflow so that the material is fully stretched during the forming process.

[0144] Step S333, performing full process simulation according to the drawing parameters and the target product digital model to obtain a target optimization result.

[0145] It should be noted that the drawing parameters are the parameters adjusted in step S332, and may include adjusting the drawing depth, the size of the drawbead resistance, and other schemes.

[0146] It can be understood that the whole process simulation is carried out according to the drawing parameters and the digital model of the target product, and the target optimization result is obtained, which means that the inflow is controlled by adjusting the drawing depth, the resistance of the drawbeads, etc. so that the material can be fully stretched during the forming process, and the simulation is performed again until the requirements are met.

[0147] This embodiment solves the problems of deformation and insufficient rigidity of automobile exterior covers that may be caused by improper material properties and process parameters during the design and manufacturing process of automobile exterior covers through material data integration, full-process simulation analysis, digital model optimization based on simulation results, and targeted drawing parameter adjustment, thereby achieving the beneficial effects of improving product performance, ensuring manufacturing quality, reducing the need for physical prototypes, reducing R&D costs, shortening the product development cycle, and ultimately achieving high-efficiency and high-reliability manufacturing of automobile exterior covers.

[0148] For example, in order to help understand the implementation process of the vehicle body outer cover rigidity simulation and optimization method obtained by combining this embodiment with the above-mentioned embodiment 1, please refer to Figure 3 , Figure 3 A brief flow chart of a rigidity simulation and optimization method for a vehicle body outer covering is provided, specifically:

[0149] Prepare and import data, define materials and sections, set implicit analysis overview, define loads, simulate product settings in different states, including static ground and fixture states, submit analysis, evaluate post-processing results, and optimize product structure or end the process based on the evaluation results; the process also includes importing and exporting forming simulation results, adjusting drawing depth and drawbead resistance and other stamping simulation steps, as well as judging whether the rigidity requirements are met to ensure that the final product meets the design standards.

[0150] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the rigidity simulation and optimization method of the vehicle body exterior cover of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0151] This application also provides a vehicle body outer cover rigidity simulation and optimization device, please refer to Figure 4 The vehicle body outer covering rigidity simulation and optimization device comprises:

[0152] A gravity simulation module 10 is used to obtain initial data of the vehicle body outer covering, perform gravity simulation according to the initial data, and obtain a digital model of the gravity simulation result;

[0153] A full process simulation module 20 is used to perform full process simulation according to the gravity simulation result digital model to obtain full process simulation result data;

[0154] The gravity simulation module 10 is also used to perform gravity simulation according to the full-process simulation result data to obtain rigidity simulation and optimization results.

[0155] The vehicle body outer cover rigidity simulation and optimization device provided by the present application adopts the vehicle body outer cover rigidity simulation and optimization method in the above-mentioned embodiment, which can solve the technical problem that the rigidity of parts cannot be analyzed from the perspective of product design characteristics and the final result of the stamping process. Compared with the prior art, the beneficial effects of the vehicle body outer cover rigidity simulation and optimization device provided by the present application are the same as the beneficial effects of the vehicle body outer cover rigidity simulation and optimization method provided by the above-mentioned embodiment, and the other technical features of the vehicle body outer cover rigidity simulation and optimization device are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0156] The present application provides a vehicle body outer cover rigidity simulation and optimization device, the vehicle body outer cover rigidity simulation and optimization device comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle body outer cover rigidity simulation and optimization method in the above-mentioned embodiment one.

[0157] Reference below Figure 5 , which shows a schematic diagram of the structure of the vehicle body outer cover rigidity simulation and optimization device suitable for implementing the embodiment of the present application. The vehicle body outer cover rigidity simulation and optimization device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The vehicle body outer covering rigidity simulation and optimization device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0158] like Figure 5As shown, the vehicle body outer cover rigidity simulation and optimization device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, various programs and data required for the vehicle body outer cover rigidity simulation and optimization device operation are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the vehicle body outer cover rigidity simulation and optimization device to communicate wirelessly or wired with other devices to exchange data. Although the vehicle body outer cover rigidity simulation and optimization device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0159] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0160] The vehicle body outer cover rigidity simulation and optimization device provided by the present application adopts the vehicle body outer cover rigidity simulation and optimization method in the above-mentioned embodiment, which can solve the technical problem that the rigidity of parts cannot be analyzed from the perspective of product design characteristics and the final result of the stamping process. Compared with the prior art, the beneficial effects of the vehicle body outer cover rigidity simulation and optimization device provided by the present application are the same as the beneficial effects of the vehicle body outer cover rigidity simulation and optimization method provided by the above-mentioned embodiment, and the other technical features in the vehicle body outer cover rigidity simulation and optimization device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0161] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0162] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0163] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle body outer cover rigidity simulation and optimization method in the above-mentioned embodiment.

[0164] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0165] The computer-readable storage medium may be included in the vehicle body outer cover rigidity simulation and optimization device; or may exist independently without being assembled into the vehicle body outer cover rigidity simulation and optimization device.

[0166] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the vehicle body outer cover rigidity simulation and optimization device, the vehicle body outer cover rigidity simulation and optimization device: obtains initial data of the vehicle body outer cover, performs gravity simulation according to the initial data, and obtains a digital model of the gravity simulation result;

[0167] Perform full process simulation according to the gravity simulation result digital model to obtain full process simulation result data;

[0168] A gravity simulation is performed based on the simulation result data of the entire process to obtain rigidity simulation and optimization results.

[0169] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0170] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0171] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0172] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle body outer cover rigidity simulation and optimization method, and can solve the technical problem that the rigidity of parts cannot be analyzed from the perspective of product design characteristics and the final results of the stamping process. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the vehicle body outer cover rigidity simulation and optimization method provided by the above-mentioned embodiment, and will not be repeated here.

[0173] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the above-mentioned vehicle body outer cover rigidity simulation and optimization method.

[0174] The computer program product provided by this application can solve the technical problem that it is impossible to analyze the rigidity of parts from the perspective of product design characteristics and the final results of the stamping process. Compared with the prior art, the beneficial effects of the computer program product provided by this application are the same as the beneficial effects of the rigidity simulation and optimization method of the vehicle body outer cover provided by the above embodiment, which will not be repeated here.

[0175] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A rigidity simulation and optimization method for vehicle body outer covering parts, It is characterized in that The method comprises: Acquiring initial data of the vehicle body outer covering, performing gravity simulation according to the initial data, and obtaining a digital model of the gravity simulation result; Perform full process simulation according to the gravity simulation result digital model to obtain full process simulation result data; A gravity simulation is performed based on the simulation result data of the entire process to obtain rigidity simulation and optimization results.

2. The method according to claim 1, It is characterized in that The steps of obtaining initial data of the vehicle body outer covering part, performing gravity simulation according to the initial data, and obtaining a digital model of the gravity simulation result include: Acquiring initial data of the vehicle body outer covering, and obtaining an initial product digital model of the vehicle body outer covering according to the initial data; Performing gravity simulation according to the initial product digital model to obtain an initial gravity simulation result; The initial product digital model is optimized according to the initial gravity simulation result to obtain an initial optimization result, and a gravity simulation result digital model is obtained according to the initial optimization result.

3. The method according to claim 2, It is characterized in that The step of performing gravity simulation according to the initial product digital model to obtain an initial gravity simulation result comprises: Obtaining a preset time period for gravity simulation, preset gravity magnitude, and selecting a gravity direction according to the direction of the initial product digital model; Selecting the lowest point of the initial product digital model relative to the ground in the simulation environment, and obtaining a ground digital model based on the lowest point; Selecting a position of the initial product digital model relative to the inspection fixture in the simulation environment, and obtaining the inspection fixture digital model according to the position; Performing gravity simulation on the ground digital model and the inspection fixture digital model respectively according to the preset time period, the preset gravity magnitude, and the gravity direction, to obtain gravity simulation results of the ground digital model and gravity simulation results of the inspection fixture digital model; An initial gravity simulation result is obtained according to the gravity simulation result of the ground digital model and the gravity simulation result of the inspection fixture digital model.

4. The method according to claim 2, It is characterized in that The step of optimizing the initial product digital model according to the initial gravity simulation result to obtain an initial optimization result and obtaining the gravity simulation result digital model according to the initial optimization result comprises: Analyze whether there is deformation according to the initial gravity simulation result to obtain an initial analysis result; When the initial analysis result shows that deformation exists, the initial displacement of the initial product digital model in a preset direction is obtained, and the appearance surface curvature and modeling structure of the initial product digital model are adjusted according to the initial displacement to obtain an initial optimization result.

5. The method according to claim 1, It is characterized in that The step of performing gravity simulation according to the full process simulation result data to obtain rigidity simulation and optimization results includes: Acquiring material data of the vehicle body outer covering part, and obtaining a target product digital model of the vehicle body outer covering part according to the material data and the whole process simulation result data; Performing gravity simulation according to the target product digital model to obtain a target gravity simulation result; The target product digital model is optimized according to the target gravity simulation result to obtain a target optimization result, and a rigid simulation and optimization result is obtained according to the target optimization result.

6. The method according to claim 5, It is characterized in that The step of optimizing the target product digital model according to the target gravity simulation result to obtain the target optimization result, and obtaining the rigid simulation and optimization result according to the target optimization result comprises: Analyze whether there is deformation according to the target gravity simulation result to obtain a target analysis result; When the target analysis result shows that deformation exists, obtaining the target displacement of the digital model of the target product in a preset direction, and adjusting the drawing parameters of the full process simulation according to the target displacement; The whole process is simulated according to the drawing parameters and the target product digital model to obtain the target optimization result.

7. The method according to claim 1, It is characterized in that The step of performing full process simulation according to the gravity simulation result digital model to obtain full process simulation result data comprises: Perform drawing according to the digital model of the gravity simulation result to obtain a drawing process result; Perform trimming according to the result of the drawing process to obtain a trimming process result; Perform shaping according to the trimming process result to obtain a shaping process result; Perform flanging according to the shaping process result to obtain a flanging process result; The whole process simulation result data is obtained according to the flanging process result.

8. A rigidity simulation and optimization device for vehicle body outer covering parts, It is characterized in that The device comprises: A gravity simulation module, used to obtain initial data of the vehicle body outer covering parts, perform gravity simulation according to the initial data, and obtain a digital model of the gravity simulation results; A full-process simulation module is used to perform full-process simulation according to the gravity simulation result digital model to obtain full-process simulation result data; The gravity simulation module is also used to perform gravity simulation according to the full-process simulation result data to obtain rigidity simulation and optimization results.

9. A vehicle body outer covering rigidity simulation and optimization device, It is characterized in that The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle body outer cover rigidity simulation and optimization method according to any one of claims 1 to 7.

10. A storage medium, It is characterized in that The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle body outer cover rigidity simulation and optimization method according to any one of claims 1 to 7 are implemented.

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