Simulated automatic pressure head loading method and system for vehicle door protection plate

Abstract

The invention relates to the technical field of vehicle simulation, and provides a vehicle door protection plate simulation automatic pressure head loading method and system, and the method comprises the steps: S1, based on finite element software, endowing a plurality of structural members and connection points of a vehicle door trim model with material parameters and attribute parameters, the plurality of structural members comprising a pressure head model; s2, according to the actual connection relation of all the structural parts, the vehicle door protection plate model is assembled; s3, loading simulation working condition constraints and loads to the vehicle door protection plate model to obtain a vehicle door protection plate simulation model; and S4, automatically loading a pressure head model onto the vehicle door protection plate simulation model. The pressure head loading efficiency and accuracy are improved, the vehicle development period is shortened, and the vehicle development cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle assembly, and more particularly to a method and system for simulating and automatically loading a door guard plate with a pressing head. Background Art

[0002] During the automotive development process, simulation analysis is a crucial step in the design phase. Analyzing structural performance through computer simulations allows for the early optimization of structures and components that don't meet requirements, thus avoiding the discovery of numerous structural issues during later physical testing. However, the existing indenter loading process typically requires manual operation, resulting in high repetitiveness and low loading efficiency. Summary of the Invention

[0003] In response to the technical problems existing in the prior art, the present invention provides a method and system for simulating and automating the pressure head loading of a vehicle door guard plate, so as to improve the efficiency and accuracy of the pressure head loading, shorten the vehicle development cycle, and reduce the vehicle development cost.

[0004] According to a first aspect of the present invention, a method for simulating an automated pressure head loading of a vehicle door panel is provided, comprising: S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model based on finite element software, wherein the multiple structural components include an indenter model; S2, assemble the door guard panel model according to the actual connection relationship of each structural component; S3, applying simulation working condition constraints and loads to the door guard panel model to obtain a door guard panel simulation model; S4, automatically loading the indenter model onto the door guard plate simulation model.

[0005] On the basis of the above technical solution, the present invention can also make the following improvements.

[0006] Optionally, in step S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model includes: Assign elastic modulus, Poisson's ratio, and density parameters to the materials of each structural component and connection point of the door guard panel. Assign corresponding material thickness properties to each structural component based on the thickness parameters of different regions of the door guard panel, and assign rigid body properties to the indenter model.

[0007] Optionally, step S2 includes: Based on the actual connection relationship between the various structural components in the door panel, the door panel model is assembled using each structural component, and the connection method of the corresponding connection points is simulated: Among them, for the snap-fit ​​connection method, the stiffness characteristics of three planar motion degrees of freedom and three rotational degrees of freedom are given; For welding or bonding connection methods, hexahedral elements are used for simulation; For the screw connection method, the stiffness characteristics of a single planar motion degree of freedom and a single rotational degree of freedom are given.

[0008] Optionally, step S3 includes: Simulation working condition constraints are applied to all fixed points of the door panel model, and loads are applied to various structural components of the door panel.

[0009] Optionally, step S4 includes: S401, identifying loading nodes and loading components according to the door interior model, and obtaining loading node numbers and loading component numbers; S402, establishing a normal vector of the loading point based on the loading node number and the loading component number, and establishing an indenter loading coordinate system using the obtained normal vector of the loading point and the loading node; S403: importing the indenter model and the indenter original coordinate system into the indenter loading coordinate system, and moving the indenter original coordinate system to a corresponding position in the indenter loading coordinate system; transforming the model using a Rodrigues matrix space rectangular coordinate system to move the indenter model from the indenter original coordinate system to a corresponding position in the indenter loading coordinate system; S404: Create a contact model between the indenter model and the door panel model.

[0010] Optionally, step S402 includes: Search the unit number set A belonging to the loading node according to the loading node, use the loading component to search all unit number sets B belonging to the loading component, select the intersection C of set A and set B and make a judgment: If the intersection C is an empty set, return to step S401 to reconfirm the loading node and loading component information; If the intersection C is a non-empty set, select the unit with the largest number in the intersection C as the normal unit, and obtain the normal vector (Nx, Ny, Nz) of the normal unit; if Ny>0, the vector does not need to be changed; if Ny<0, all three components of the vector are multiplied by -1; A new point is copied for the loading node, and the new point is moved a preset distance along the normal of the plane of the unit where the original loading node is located. The moved point is used as the origin, the normal vector is the positive direction of the Z axis, and the projection direction of the positive direction of the Z axis of the absolute coordinate system on the normal plane of the normal vector is the Y direction to establish a local rectangular coordinate system and obtain the indenter loading coordinate system.

[0011] Optionally, in step S404, the contact model between the indenter model and the door panel model includes all units of the indenter model and all units of the door panel model.

[0012] According to a second aspect of the present invention, there is provided a door panel simulation automated press head loading system, comprising: a parameter assignment module for assigning material parameters and property parameters to a plurality of structural components and connection points of the door interior model based on finite element software, wherein the plurality of structural components include an indenter model; The assembly module is used to assemble the door guard panel model according to the actual connection relationship of each structural component; A simulation construction module, configured to load the door guard panel model with simulation working condition constraints and loads to obtain a door guard panel simulation model; The loading module is used to automatically load the indenter model onto the door guard plate simulation model.

[0013] According to a third aspect of the present invention, an electronic device is provided, comprising a memory and a processor, wherein the processor is configured to implement the steps of the above-mentioned door panel simulation automated pressure head loading method when executing a computer management program stored in the memory.

[0014] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer management program is stored. When the computer management program is executed by a processor, the steps of the above-mentioned vehicle door panel simulation automated pressure head loading method are implemented.

[0015] The present invention provides a method, system, electronic device and storage medium for simulating and automating the pressure head loading of a vehicle door panel, which can replace manual pressure simulation analysis of the structures of different materials on the vehicle door panel, thereby improving the efficiency and accuracy of the pressure head loading, shortening the vehicle development cycle and reducing vehicle development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flow chart of a door guard panel simulation automated pressure head loading method provided by the present invention; Figure 2 This is a block diagram of the door guard panel simulation automated pressure head loading system provided by the present invention; Figure 3 A schematic diagram of the hardware structure of a possible electronic device provided by the present invention; Figure 4 A schematic diagram of the hardware structure of a possible computer-readable storage medium provided by the present invention. DETAILED DESCRIPTION

[0017] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0018] Figure 1 The present invention provides a flow chart of a method for simulating and automating the loading of a door guard plate, such as Figure 1 As shown, the method includes steps S1 to S4: S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model based on finite element software, wherein the multiple structural components include an indenter model; S2, assemble the door guard panel model according to the actual connection relationship of each structural component; S3, applying simulation working condition constraints and loads to the door guard panel model to obtain a door guard panel simulation model; S4, automatically loading the indenter model onto the door guard plate simulation model.

[0019] As can be understood, addressing the shortcomings of the background art, the present invention proposes a method for automating the simulated indenter loading of a vehicle door panel. This method constructs a door panel simulation model based on a vehicle door interior model and automatically loads the indenter model. This method can replace manual pressure simulation analysis of different material structures on the door panel, thereby improving indenter loading efficiency and accuracy, shortening vehicle development cycles, and reducing vehicle development costs.

[0020] In a possible embodiment, in step S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model includes: The elastic modulus, Poisson's ratio, and density parameters are assigned to the materials of the various structural components and connection points of the door guard panel. The corresponding material thickness properties are assigned to each structural component based on the thickness parameters of different areas of the door guard panel. The rigid body properties are assigned to the indenter model to ensure that the weight of each structure is consistent with the design weight.

[0021] It can be understood that in this embodiment, material parameters and thickness properties are assigned to the various structural parts and connection points that make up the door interior model. Among them, the material parameters are input according to the test data of the material manufacturer, the material thickness properties are assigned according to different thickness areas, and the indenter is assigned rigid body properties, so that the parameters of each structural part and connection point are consistent with the actual door interior design parameters, ensuring that the weight of each component is the same as the design weight, and ensuring the accuracy of subsequent simulations.

[0022] In a possible embodiment, step S2 includes: Based on the actual connection relationship between the various structural components in the door panel, the door panel model is assembled using each structural component, and the connection method of the corresponding connection points is simulated: Among them, for the snap-fit ​​connection method, the stiffness characteristics of three planar motion degrees of freedom and three rotational degrees of freedom are given. For example, the snap-fit ​​connection is simulated using the CONN3D2 unit, which gives the stiffness characteristics of six degrees of freedom, namely the stiffness characteristics of the three translational degrees of freedom of X, Y, and Z and the three rotational degrees of freedom of X, Y, and Z, with X, Y, and Z being perpendicular to each other. For welding or bonding connection methods, hexahedral elements are used for simulation; For the screw connection, the stiffness characteristics of a single planar motion degree of freedom and a single rotational degree of freedom are given, for example, using the COUP_KIN unit for simulation.

[0023] It can be understood that step S2 is used to complete the connection and assembly between the various components of the door guard assembly to ensure that the connection of the model is consistent with the actual vehicle.

[0024] In a possible embodiment, step S3 includes: Simulation working condition constraints are applied to all fixed points of the door panel model, and loads are applied to various structural components of the door panel.

[0025] It can be understood that the simulation working condition constraints of the door panel include all the panel fixing points, and the load size of each structural component of the door panel is the manufacturer's test data.

[0026] In a possible embodiment, step S4 includes sub-steps S401 to S404: S401, identifying loading nodes and loading components according to the door interior model, and obtaining loading node numbers and loading component numbers; S402, establishing a normal vector of the loading point based on the loading node number and the loading component number obtained in S401, and establishing an indenter loading coordinate system using the normal vector of the loading point obtained in S401 and the loading node; specifically comprising: According to the loading node, search for the unit number set A[a1, a2, ..., an] belonging to the loading node, use the loading component to search for all unit number sets B[b1, b2, ..., bn] belonging to the loading component, select the intersection C of set A and set B and make a judgment: If the intersection C is an empty set, return to step S401 to reconfirm the loading node and loading component information; If the intersection C is a non-empty set, select the unit with the largest number in the intersection C as the normal unit, and obtain the normal vector (Nx, Ny, Nz) of the normal unit; if Ny>0, the vector does not need to be changed; if Ny<0, all three components of the vector are multiplied by -1; A new point is copied for the loading node, and the new point is moved a preset distance (for example, 5 mm) along the normal of the plane of the unit where the original loading node is located. The moved point is used as the origin, the normal vector is the positive direction of the Z axis, and the projection direction of the positive direction of the Z axis of the absolute coordinate system on the normal plane of the normal vector is the Y direction to establish a local rectangular coordinate system. This coordinate system is the indenter loading coordinate system.

[0027] S403: importing the indenter model and the indenter original coordinate system into the indenter loading coordinate system, and moving the indenter original coordinate system to a corresponding position in the indenter loading coordinate system; transforming the model using a Rodrigues matrix space rectangular coordinate system to move the indenter model from the indenter original coordinate system to a corresponding position in the indenter loading coordinate system; S404: Create a contact model between the indenter model and the door panel model, wherein the contact model between the indenter model and the door panel model includes all units of the indenter model and all units of the door panel model.

[0028] Figure 2 The structure diagram of a door guard plate simulation automatic pressure head loading system provided by the embodiment of the present invention is as follows: Figure 2 As shown, a door panel simulation automated press head loading system includes a parameter assignment module, an assembly module, a simulation construction module and a loading module, wherein: a parameter assignment module for assigning material parameters and property parameters to a plurality of structural components and connection points of the door interior model based on finite element software, wherein the plurality of structural components include an indenter model; The assembly module is used to assemble the door guard panel model according to the actual connection relationship of each structural component; A simulation construction module, configured to load the door guard panel model with simulation working condition constraints and loads to obtain a door guard panel simulation model; The loading module is used to automatically load the indenter model onto the door guard plate simulation model.

[0029] It can be understood that the door panel simulation automatic pressure head loading system provided by the present invention corresponds to the door panel simulation automatic pressure head loading method provided by the aforementioned embodiments. The relevant technical features of the door panel simulation automatic pressure head loading system can refer to the relevant technical features of the door panel simulation automatic pressure head loading method, which will not be repeated here.

[0030] See also Figure 3 , Figure 3 Schematic diagram of an embodiment of an electronic device provided by an embodiment of the present invention. Figure 3 As shown, an embodiment of the present invention provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor 320. When the processor 320 executes the computer program 311, the following steps are implemented: S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model based on finite element software, wherein the multiple structural components include an indenter model; S2, assemble the door guard panel model according to the actual connection relationship of each structural component; S3, applying simulation working condition constraints and loads to the door guard panel model to obtain a door guard panel simulation model; S4, automatically loading the indenter model onto the door guard plate simulation model.

[0031] See also Figure 4 , Figure 4 Schematic diagram of an embodiment of a computer-readable storage medium provided by the present invention. Figure 4 As shown, this embodiment provides a computer-readable storage medium 400 on which a computer program 411 is stored. When the computer program 411 is executed by a processor, the following steps are implemented: S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model based on finite element software, wherein the multiple structural components include an indenter model; S2, assemble the door guard panel model according to the actual connection relationship of each structural component; S3, applying simulation working condition constraints and loads to the door guard panel model to obtain a door guard panel simulation model; S4, automatically loading the indenter model onto the door guard plate simulation model.

[0032] An embodiment of the present invention provides a method, system and storage medium for simulating and automatically loading a pressure head for a vehicle door panel. A simulation model of a vehicle door panel is constructed based on a vehicle door interior model, and the pressure head model is automatically loaded. This can replace manual pressure simulation analysis of the structures of different materials on the vehicle door panel, thereby improving the efficiency and accuracy of the pressure head loading, shortening the vehicle development cycle, and reducing vehicle development costs.

[0033] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0034] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0035] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0036] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0037] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0038] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0039] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A door guard plate simulation automatic pressure head loading method, characterized in that: include: S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model based on finite element software, wherein the multiple structural components include an indenter model; S2, assemble the door guard panel model according to the actual connection relationship of each structural component; S3, applying simulation working condition constraints and loads to the door guard panel model to obtain a door guard panel simulation model; S4, automatically loading the indenter model onto the door guard plate simulation model.

2. The door guard plate simulation automated pressure head loading method according to claim 1, characterized in that: In step S1, assigning material parameters and property parameters to multiple structural components and connection points of the door interior model includes: Assign elastic modulus, Poisson's ratio, and density parameters to the materials of each structural component and connection point of the door guard panel. Assign corresponding material thickness properties to each structural component based on the thickness parameters of different regions of the door guard panel, and assign rigid body properties to the indenter model.

3. The door panel simulation automated pressure head loading method according to claim 1, characterized in that: Step S2 includes: Based on the actual connection relationship between the various structural components in the door panel, the door panel model is assembled using each structural component, and the connection method of the corresponding connection points is simulated: Among them, for the snap-fit ​​connection method, the stiffness characteristics of three planar motion degrees of freedom and three rotational degrees of freedom are given; For welding or bonding connection methods, hexahedral elements are used for simulation; For the screw connection method, the stiffness characteristics of a single planar motion degree of freedom and a single rotational degree of freedom are given.

4. The door panel simulation automated pressure head loading method according to claim 1, characterized in that: Step S3 includes: Simulation working condition constraints are applied to all fixed points of the door panel model, and loads are applied to various structural components of the door panel.

5. The door panel simulation automated pressure head loading method according to claim 1, characterized in that: Step S4 includes: S401, identifying loading nodes and loading components according to the door interior model, and obtaining loading node numbers and loading component numbers; S402, establishing a normal vector of the loading point based on the loading node number and the loading component number, and establishing an indenter loading coordinate system using the obtained normal vector of the loading point and the loading node; S403: importing the indenter model and the indenter original coordinate system into the indenter loading coordinate system, and moving the indenter original coordinate system to a corresponding position in the indenter loading coordinate system; transforming the model using a Rodrigues matrix space rectangular coordinate system to move the indenter model from the indenter original coordinate system to a corresponding position in the indenter loading coordinate system; S404: Create a contact model between the indenter model and the door panel model.

6. The door panel simulation automated pressure head loading method according to claim 5, characterized in that: Step S402 includes: Search the unit number set A belonging to the loading node according to the loading node, use the loading component to search all unit number sets B belonging to the loading component, select the intersection C of set A and set B and make a judgment: If the intersection C is an empty set, return to step S401 to reconfirm the loading node and loading component information; If the intersection C is a non-empty set, select the unit with the largest number in the intersection C as the normal unit, and obtain the normal vector (Nx, Ny, Nz) of the normal unit; if Ny>0, the vector does not need to be changed; if Ny<0, all three components of the vector are multiplied by -1; A new point is copied for the loading node, and the new point is moved a preset distance along the normal of the plane of the unit where the original loading node is located. The moved point is used as the origin, the normal vector is the positive direction of the Z axis, and the projection direction of the positive direction of the Z axis of the absolute coordinate system on the normal plane of the normal vector is the Y direction to establish a local rectangular coordinate system and obtain the indenter loading coordinate system.

7. The door panel simulation automated pressure head loading method according to claim 6, characterized in that: In step S404, the contact model between the indenter model and the door panel model includes all units of the indenter model and all units of the door panel model.

8. A door guard plate simulation automatic pressure head loading system, characterized in that: include: a parameter assignment module for assigning material parameters and property parameters to a plurality of structural components and connection points of the door interior model based on finite element software, wherein the plurality of structural components include an indenter model; The assembly module is used to assemble the door guard panel model according to the actual connection relationship of each structural component; A simulation construction module, configured to load the door guard panel model with simulation working condition constraints and loads to obtain a door guard panel simulation model; The loading module is used to automatically load the indenter model onto the door guard plate simulation model.

9. An electronic device, characterized in that: It comprises a memory and a processor, and the processor is used to implement the steps of the door guard panel simulation automatic pressure head loading method as described in any one of claims 1 to 7 when executing the computer management program stored in the memory.

10. A computer-readable storage medium, characterized in that A computer management program is stored thereon, and when the computer management program is executed by the processor, the steps of the door guard panel simulation automatic pressure head loading method as described in any one of claims 1 to 7 are implemented.

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