Modeling method and device for irregular part, vehicle, medium and program product

Abstract

The invention relates to the technical field of irregular part modeling, in particular to an irregular part modeling method and device, a vehicle, a medium and a program product, and the method comprises the steps: obtaining an initial long fiber laying composite material irregular model of an irregular part; performing thickness region division according to the target thickness; based on the single-layer thickness of the long fiber ply composite material and the area thicknesses corresponding to the areas with different thicknesses, single-layer attribute information of the corresponding long fiber ply composite material is determined, the long fiber ply composite material is laid according to the single-layer attribute information, the initial irregular model of the long fiber ply composite material is optimized, and the irregular model of the long fiber ply composite material is obtained. And constructing an irregular model of the long-fiber laminated composite material. Therefore, the problems that the calculation result is inconsistent with the reality and the calculation result is inaccurate due to the fact that the extraction middle plane cannot accurately reflect the actual paving layer information are solved; the entity unit cannot reflect the single-layer attribute information of the long fiber laying layer, and the simulation analysis result cannot evaluate the long fiber laying layer.

Description

Technical Field

[0001] This application relates to the field of irregular component modeling technology, and in particular to a modeling method, device, vehicle, medium and program product for irregular components. Background Technology

[0002] The weight of a new energy vehicle directly affects its driving range. Lightweighting is an inevitable direction for the development of new energy vehicles, and the application of long fiber layup composite material structures in automobiles is an important means to solve the problem of vehicle lightweighting.

[0003] In related technologies, composite material structures can be modeled by extracting mid-surfaces, which is particularly suitable for finite element analysis of thin-walled structures (such as vehicle body panels, brackets, etc.). The core principle is to extract the mid-layer surface of the geometry, simplify the three-dimensional solid into a two-dimensional shell element model, and at the same time retain the geometric features and mechanical properties of the original structure, thereby constructing a model of irregular parts of long fiber layup composite materials. Alternatively, composite material structures can be discretized using three-dimensional solid elements to simulate the geometry, material properties and interlayer interactions of each layup, thereby capturing the thickness stress and complex failure behavior, and thus constructing the corresponding model.

[0004] However, in related technologies, due to the uneven thickness and irregular characteristics of the overall structure, the extraction of the mid-surface cannot accurately reflect the actual ply information, resulting in calculation results that do not match reality and are inaccurate. Furthermore, the simulation model of composite materials established by solid elements cannot reflect the single-layer attribute information of long fiber plies, and the simulation analysis results cannot evaluate long fiber plies, which urgently need improvement. Summary of the Invention

[0005] This application provides a modeling method, device, vehicle, medium, and program product for irregular components to solve the problems in related technologies, such as the inability of extracted mid-surfaces to accurately reflect the actual layup information, resulting in inaccurate calculation results; and the inability of solid elements to represent the single-layer attribute information of long fiber layups, making it impossible for simulation analysis results to evaluate long fiber layups.

[0006] The first aspect of this application provides a modeling method for irregular parts of a vehicle, comprising the following steps: obtaining an initial irregular model of a long fiber layup composite material for at least one irregular part in the vehicle; based on the initial irregular model of the long fiber layup composite material, dividing the at least one irregular part into at least two sets of thickness regions according to a target thickness; determining the corresponding single-layer attribute information of the long fiber layup composite material based on the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions, laying the long fiber layup composite material according to the single-layer attribute information, optimizing the initial irregular model of the long fiber layup composite material, and constructing an irregular model of the long fiber layup composite material for the at least one irregular part.

[0007] Optionally, in one embodiment of this application, determining the corresponding single-layer property information of the long fiber layup composite material based on the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions includes: obtaining the material property information of the long fiber layup composite material; calculating the layup information of the long fiber layup composite material based on the single-layer thickness and the region thickness; obtaining the layup angle information of the long fiber layup composite material based on the layup information; and determining the single-layer property information based on the material property information, the layup information, and the angle information.

[0008] Optionally, in one embodiment of this application, the step of laying the long fiber layup composite material according to the single-layer attribute information, optimizing the initial irregular model of the long fiber layup composite material, and constructing the irregular model of the long fiber layup composite material for the at least one irregular component includes: determining the stacking direction of each layer of the long fiber layup composite material based on the single-layer attribute information; obtaining coordinate system information corresponding to the different thickness regions to determine the base plane for laying the long fiber layup composite material based on the coordinate system information; determining the layer number angle information corresponding to the layup information in the single-layer attribute information based on the base plane and the stacking direction; and laying the long fiber layup composite material based on the base plane, the stacking direction, the layup information, and the layer number angle information to establish the irregular model of the long fiber layup composite material.

[0009] Optionally, in one embodiment of this application, the step of laying the long fiber layup composite material according to the single-layer attribute information, optimizing the initial irregular model of the long fiber layup composite material, and constructing the irregular model of the long fiber layup composite material for the at least one irregular component includes: obtaining the actual layup information and / or actual layer angle information of the long fiber layup composite material; detecting whether the actual layup information and / or actual layer angle information is correct; if the actual layup information and / or actual layer angle information is detected to be incorrect, adjusting the actual layup information and / or actual layer angle information using the base plane, the stacking direction, the layup information, and the layer angle information until the correct actual layup information and / or correct actual layer angle information is obtained, so as to lay the long fiber layup composite material according to the correct actual layup information and / or correct actual layer angle information until the irregular model of the long fiber layup composite material is obtained.

[0010] Optionally, in one embodiment of this application, the step of laying the long fiber layup composite material based on the base plane, the stacking direction, the layup information, and the layer angle information to establish an irregular model of the long fiber layup composite material includes: obtaining the abscissa direction of the corresponding thickness region; determining the 0° direction of the base plane laying of the corresponding long fiber layup composite material based on the abscissa direction; determining whether the base plane meets a preset plane condition; if the base plane does not meet the preset plane condition, optimizing the base plane until a base plane that meets the preset plane condition is obtained, and laying the long fiber layup composite material based on the 0° direction, the base plane of the preset plane condition, the stacking direction, the layup information, and the layer angle information to obtain an irregular model of the long fiber layup composite material; if the base plane meets the preset plane condition, laying the long fiber layup composite material based on the 0° direction, the base plane, the stacking direction, the layup information, and the layer angle information to obtain an irregular model of the long fiber layup composite material.

[0011] A second aspect of this application provides a modeling apparatus for irregular parts of a vehicle, comprising: an acquisition module for acquiring an initial irregular model of at least one irregular part of a vehicle made of long fiber layup composite material; a division module for dividing the at least one irregular part into at least two sets of thickness regions according to a target thickness based on the initial irregular model of the long fiber layup composite material; and a construction module for determining the corresponding single-layer attribute information of the long fiber layup composite material based on the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions, so as to lay the long fiber layup composite material according to the single-layer attribute information, optimize the initial irregular model of the long fiber layup composite material, and construct the irregular model of the long fiber layup composite material for the at least one irregular part.

[0012] Optionally, in one embodiment of this application, the construction module includes: a first acquisition unit, configured to acquire material property information of the long fiber layup composite material; a calculation unit, configured to calculate layup information of the long fiber layup composite material based on the single-layer thickness and the region thickness; a second acquisition unit, configured to acquire angle information of the long fiber layup composite material based on the layup information; and a first determination unit, configured to determine the single-layer property information based on the material property information, the layup information, and the angle information.

[0013] Optionally, in one embodiment of this application, the construction module includes: a second determining unit, configured to determine the stacking direction of each layer of long fiber layup composite material based on the single-layer attribute information; a third determining unit, configured to obtain coordinate system information corresponding to the different thickness regions, so as to determine the base plane for laying the long fiber layup composite material according to the coordinate system information; a fourth determining unit, configured to determine the layer number angle information corresponding to the layup information in the single-layer attribute information based on the base plane and the stacking direction; and a first construction unit, configured to lay the long fiber layup composite material based on the base plane, the stacking direction, the layup information and the layer number angle information, so as to establish an irregular model of the long fiber layup composite material.

[0014] Optionally, in one embodiment of this application, the construction module includes: a third acquisition unit, configured to acquire the actual ply information and / or actual layer angle information of the long fiber layup composite material; a detection unit, configured to detect whether the actual ply information and / or the actual layer angle information is correct; and a second construction unit, configured to, when the actual ply information and / or the actual layer angle information is detected to be incorrect, adjust the actual ply information and / or the actual layer angle information using the base plane, the stacking direction, the ply information, and the layer angle information until correct actual ply information and / or correct actual layer angle information is obtained, so as to lay the long fiber layup composite material according to the correct actual ply information and / or the correct actual layer angle information until an irregular model of the long fiber layup composite material is obtained.

[0015] Optionally, in one embodiment of this application, the first construction unit includes: an acquisition subunit, configured to acquire the horizontal coordinate direction of the corresponding thickness region; a determination subunit, configured to determine the 0° direction of the corresponding long fiber layup composite material base plane based on the horizontal coordinate direction; a judgment subunit, configured to determine whether the base plane meets a preset plane condition; a first construction subunit, configured to optimize the base plane until a base plane that meets the preset plane condition is obtained when the base plane does not meet the preset plane condition, and lay the long fiber layup composite material based on the 0° direction, the base plane of the preset plane condition, the stacking direction, the layup information, and the layer angle information to obtain an irregular model of the long fiber layup composite material; and a second construction subunit, configured to lay the long fiber layup composite material based on the 0° direction, the base plane, the stacking direction, the layup information, and the layer angle information when the base plane meets the preset plane condition to obtain an irregular model of the long fiber layup composite material.

[0016] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the modeling method for irregular parts of a vehicle as described in the above embodiments.

[0017] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for modeling irregular parts of a vehicle.

[0018] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, implements the above-described method for modeling irregular parts of a vehicle.

[0019] This application embodiment first obtains an initial irregular model of long fiber layup composite material for irregular vehicle components. Then, based on the initial irregular model, regions are divided according to the target thickness. The single-layer property information of the long fiber layup composite material is determined according to the single-layer thickness and the corresponding region thickness of different thickness regions. The long fiber layup composite material is then laid according to the single-layer property information, optimizing the initial irregular model and constructing a new irregular model of long fiber layup composite material. This model can accurately predict the structural performance of composite materials, effectively supporting the lightweighting of materials in new energy vehicle structures and improving driving range. Therefore, it solves the problems in related technologies, such as the inaccurate reflection of actual layup information by extracting mid-surfaces, leading to inaccurate calculation results; and the inability of solid elements to represent the single-layer property information of long fiber layups, making simulation analysis results unable to evaluate long fiber layups.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a method for modeling irregular parts of a vehicle according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the unequal thickness long fiber layup composite material provided according to the embodiments of this application; Figure 3 This is a schematic diagram of the long fiber monolayer laying direction and thickness information provided according to an embodiment of this application; Figure 4 This is a schematic diagram of the local long fiber layup in the 0-degree direction and local coordinate system according to an embodiment of this application; Figure 5 This is a schematic diagram of the layup sequence and long fiber orientation according to an embodiment of this application; Figure 6 A flowchart illustrating the working principle of a method for modeling irregular vehicle parts according to an embodiment of this application; Figure 7 This is a block diagram of a modeling device for irregular parts of a vehicle according to an embodiment of this application; Figure 8 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application.

[0022] Figure label: Among them, 10-modeling device for irregular parts of vehicles; 100-acquisition module, 200-division module, 300-construction module; 801-memory, 802-processor, 803-communication interface. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0024] The following description, with reference to the accompanying drawings, describes a modeling method, apparatus, vehicle, medium, and program product for irregular components according to embodiments of this application. Addressing the issues mentioned in the background art, such as the inaccurate reflection of actual ply information by extracted mid-surfaces leading to discrepancies between calculation results and reality, and the inability of solid elements to represent the single-layer attribute information of long fiber layups, resulting in simulation analysis results that cannot evaluate long fiber layups, this application provides a modeling method for irregular vehicle components. In this method, an initial irregular model of the long fiber layup composite material for the irregular vehicle component is first obtained. Then, based on the initial irregular model, regions are divided according to the target thickness. The single-layer attribute information of the long fiber layup composite material is determined based on the single-layer thickness and the corresponding region thickness of different thickness regions. The long fiber layup composite material is then laid according to the single-layer attribute information, optimizing the initial irregular model and constructing a new irregular model of the long fiber layup composite material. This model can accurately predict the structural performance of composite materials, effectively supporting the lightweighting of materials in new energy vehicle structures and improving driving range. This solves the problems in related technologies, such as the inability of extracted mid-surfaces to accurately reflect the actual ply information, leading to discrepancies between the calculation results and reality, and the inability of solid elements to represent the single-layer attribute information of long fiber ply, making it impossible for simulation analysis results to evaluate long fiber ply.

[0025] Specifically, Figure 1 This is a flowchart of a method for modeling irregular parts of a vehicle according to an embodiment of this application.

[0026] like Figure 1 As shown, the modeling method for irregular parts of the vehicle includes the following steps: In step S101, an initial long fiber layup composite irregular model is obtained for at least one irregular component in the vehicle.

[0027] It is understood that, in the embodiments of this application, irregular components may include, but are not limited to, typical vehicle load-bearing components and covering components such as subframes, wheels, control arms, and body-in-white, and this application does not impose specific limitations.

[0028] As one possible approach, embodiments of this application can obtain an initial long fiber layup composite irregular model of irregular components in a vehicle.

[0029] For example, in the embodiments of this application, the initial irregular model of the irregular long fiber layup composite material of the irregular component can be imported through Hypermesh software. Taking the long fiber layup composite material sheet metal structure of a new energy vehicle as an example, the coordinate system information of the vehicle can be obtained, that is, the positive direction of the X-axis is from the front to the rear of the vehicle, the positive direction of the vertical upward is the positive direction of the Z-axis, and the positive direction of the Y-axis of the vehicle coordinate system is a right-hand screw rule.

[0030] In step S102, based on the initial long fiber layup composite irregular model, at least one irregular component is divided into at least two sets of thickness regions according to the target thickness.

[0031] In some embodiments, the initial irregular model of the long fiber layup composite material can be cut into at least two groups of thickness regions according to areas of equal thickness. This can be understood as the ability to locally cut irregular structures of varying thicknesses. The principle of cutting is to cut out areas of equal local thickness and group them together, because the number of long fiber layup layers is already determined in areas of equal thickness, facilitating attribute establishment. Furthermore, areas of similar thickness are cut together; the finer the cutting, the higher the modeling accuracy. The specific thickness can be set by those skilled in the art according to actual conditions, and this application does not impose specific limitations.

[0032] For example, in this embodiment of the application, the initial irregular model of the long fiber layup composite material is imported using Hypermesh software. Regions of equal thickness in the overall structure are grouped together, meaning regions of equal thickness are placed in one component. Simultaneously, the material thickness of different regions is defined, resulting in the overall structure as follows: Figure 2 As shown, the irregular component can be divided into four regions: region 1, region 2, region 3, and region 4. The thickness information of each region is shown in Table 1. Table 1 is a schematic table illustrating the thickness of different regions of the overall structure provided in one embodiment of this application.

[0033] Table 1

[0034] In step S103, based on the single-layer thickness of the long fiber layup composite material and the corresponding region thickness of different thickness regions, the single-layer property information of the corresponding long fiber layup composite material is determined, so as to lay up the long fiber layup composite material according to the single-layer property information, optimize the initial irregular model of the long fiber layup composite material, and construct an irregular model of the long fiber layup composite material of at least one irregular component.

[0035] It is understood that, in the embodiments of this application, the single-layer attribute information may include, but is not limited to, material attribute information, ply information, and angle information, etc., and this application does not impose specific limitations.

[0036] In actual implementation, the embodiments of this application can obtain the single-layer property information of the corresponding long fiber layup composite material based on the single-layer thickness of the long fiber layup composite material and the area thickness corresponding to different thickness regions, and then lay up the long fiber layup composite material according to the single-layer property information to optimize the initial irregular model of the long fiber layup composite material, thereby constructing the irregular model of the long fiber layup composite material.

[0037] Optionally, in one embodiment of this application, the single-layer property information of the long fiber layup composite material is determined based on the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions. This includes: obtaining the material property information of the long fiber layup composite material; calculating the layup information of the long fiber layup composite material based on the single-layer thickness and region thickness; obtaining the angle information of the long fiber layup composite material based on the layup information; and determining the single-layer property information based on the material property information, layup information, and angle information.

[0038] It is understood that, in the embodiments of this application, the material property information can be the material property information of unidirectional fabrics, such as the elastic modulus in the X direction, the elastic modulus in the Y direction, the shear modulus in the XY plane, the tensile strength in the X direction, the compressive strength in the X direction, the tensile strength in the Y direction, the compressive strength in the Y direction, the shear strength in the XY plane, the Poisson's ratio in the XY plane, and the material density, as shown in Table 2. Alternatively, it can be the material property information of ±45° biaxial fabrics, such as the elastic modulus in the X direction, the elastic modulus in the Y direction, the shear modulus in the XY plane, the tensile strength in the X direction, the compressive strength in the X direction, the tensile strength in the Y direction, the compressive strength in the Y direction, the shear strength in the XY plane, the Poisson's ratio in the XY plane, and the material density, as shown in Table 3. The specific settings can be made by those skilled in the art according to actual conditions, and this application does not impose specific limitations. Table 2 is a material property information table for 0° or 90° unidirectional fabrics provided according to an embodiment of this application; Table 3 is a material property information table for ±45° biaxial fabrics provided according to an embodiment of this application.

[0039] Table 2

[0040] Table 3

[0041] Where Exx represents the elastic modulus in the X direction, Eyy represents the elastic modulus in the Y direction, Gxy represents the shear modulus in the XY plane, Xt represents the tensile strength in the X direction, Xc represents the compressive strength in the X direction, Yt represents the tensile strength in the Y direction, Yc represents the compressive strength in the Y direction, Sxy represents the shear strength in the XY plane, p represents the material density, and Vxy represents the Poisson's ratio in the XY plane.

[0042] Furthermore, in some embodiments, the single-layer thickness of the long fiber layup composite material in the embodiments of this application is known. After determining the regional thickness of areas with the same thickness, the layup information of the long fiber layup composite material can be calculated. Combined with... Figure 2 As shown, taking region 2 as an example, the region thickness is 3.6 mm and the single-layer thickness is 0.2 mm. Therefore, region 2 needs to lay 18 layers of long fiber layup composite material. However, the laying direction, i.e. the laying angle, of each of these 18 layers is different. Some are laid at 0°, some at 90°, and some at 45°. The specific settings can be made by those skilled in the art according to the actual situation. This application does not impose specific restrictions. Then, based on the material property information, layup information, and angle information, the single-layer property information is determined.

[0043] For example, embodiments of this application can establish material property information of long fiber layup composite materials based on Hypermesh software, such as elastic modulus, shear modulus, tensile strength, and compressive strength in the X and Y directions, etc., without specific limitations. Furthermore, embodiments of this application can establish single-layer property information of long fiber layup composite materials for areas of the same thickness, which may include, but is not limited to, material property information, layup information, and angle information.

[0044] Optionally, in one embodiment of this application, the long fiber layup composite material is laid according to the single-layer attribute information, the initial irregular model of the long fiber layup composite material is optimized, and an irregular model of the long fiber layup composite material with at least one irregular component is constructed, including: determining the stacking direction of each layer of long fiber layup composite material based on the single-layer attribute information; obtaining coordinate system information corresponding to different thickness regions to determine the base plane for laying the long fiber layup composite material according to the coordinate system information; determining the layer number angle information corresponding to the layup information in the single-layer attribute information based on the base plane and the stacking direction; and laying the long fiber layup composite material based on the base plane, stacking direction, layup information, and layer number angle information to establish an irregular model of the long fiber layup composite material.

[0045] In some embodiments, the present application can establish single-layer property information of long fiber layup composite material for each region of the same thickness, and define these single-layer plates as laminates, thereby determining the stacking direction of the laminates, which are generally laid layer by layer along the normal direction of the shell unit.

[0046] In some embodiments, the present application may select a base plane for long fiber layup for each region of the same thickness, and mesh the base plane using S4R (Four-node reduced integration quadrilateral shell element for thin or thick shell structures) elements, and specify the direction of the long fiber layup on the base plane, i.e., whether it is a 0° layup, a 45° layup or a 90° layup. The present application does not impose specific limitations.

[0047] Furthermore, before optimizing the initial irregular model of the long fiber layup composite material, this embodiment of the application needs to clarify the layer number angle information corresponding to each layup information, i.e., the layup angle. Then, by combining material property information, layup information, single layer thickness, layer number angle information, etc., a set of layup units for each layer is established to facilitate the subsequent setting of single layer attribute information. The schematic diagram is shown below. Figure 3 As shown.

[0048] Optionally, in one embodiment of this application, a long fiber layup composite material is laid based on the base plane, stacking direction, ply information, and layer angle information to establish an irregular model of the long fiber layup composite material. This includes: obtaining the abscissa direction of the corresponding thickness region; determining the 0° direction of the base plane for laying the corresponding long fiber layup composite material based on the abscissa direction; determining whether the base plane meets the preset plane conditions; if the base plane does not meet the preset plane conditions, optimizing the base plane until a base plane that meets the preset plane conditions is obtained, and laying the long fiber layup composite material based on the 0° direction, the base plane with the preset plane conditions, the stacking direction, ply information, and layer angle information to obtain an irregular model of the long fiber layup composite material; if the base plane meets the preset plane conditions, laying the long fiber layup composite material based on the 0° direction, the base plane, the stacking direction, ply information, and layer angle information to obtain an irregular model of the long fiber layup composite material.

[0049] It is understood that the embodiments of this application can establish a local coordinate system for each region of the same thickness, and determine the X and Z directions of the local coordinate system, and take the X direction as the 0° direction of the base plane and the Z direction as the 90° direction of the base plane (i.e., the normal direction), thereby ensuring the continuity of fiber layup in regions of different thicknesses.

[0050] For example, in this embodiment, the 0° and 90° directions of the base plane can be defined first, and then a local coordinate system can be established for each region of the same thickness, thereby obtaining the local coordinate system of region 2. The X direction of the local coordinate system of region 2 is consistent with the 0° direction of the long fiber layup base plane. A schematic diagram of the 0° direction of the long fiber layup base plane and the direction of the local coordinate system is shown below. Figure 4 As shown.

[0051] Furthermore, in the embodiments of this application, after the area thickness is divided, a base plane of long fiber layup composite material can be selected on the same thickness area. It can be the upper surface of the overall structure or the lower surface of the overall structure. The specific settings can be made by those skilled in the art according to the actual situation, and this application does not impose any specific limitations.

[0052] In some embodiments, this application can determine whether the base plane meets certain planar conditions. If not, S4R elements are used for mesh generation to optimize the base plane, thereby obtaining a base plane that meets the certain planar conditions. These certain planar conditions can be set by those skilled in the art according to actual conditions, and this application does not impose specific limitations.

[0053] Furthermore, in this embodiment, long fiber layup composite material can be laid based on a base plane that meets certain planar conditions, the 0° direction, the stacking direction, the layup information, and the layer angle information, thereby obtaining an irregular model of long fiber layup composite material.

[0054] Optionally, in one embodiment of this application, the long fiber layup composite material is laid according to single-layer attribute information, the initial irregular model of the long fiber layup composite material is optimized, and an irregular model of the long fiber layup composite material with at least one irregular component is constructed, including: obtaining the actual layup information and / or actual layer angle information of the long fiber layup composite material; detecting whether the actual layup information and / or actual layer angle information is correct; if the actual layup information and / or actual layer angle information is detected to be incorrect, adjusting the actual layup information and / or actual layer angle information using the base plane, stacking direction, layup information, and layer angle information until the correct actual layup information and / or correct actual layer angle information is obtained, so as to lay the long fiber layup composite material according to the correct actual layup information and / or correct actual layer angle information until the irregular model of the long fiber layup composite material is obtained.

[0055] In actual implementation, the embodiments of this application can detect whether the actual ply information is correct, and if the actual ply information is incorrect, adjust the actual ply information until the correct actual ply information is obtained, and then lay the long fiber ply composite material to obtain an irregular model of the long fiber ply composite material.

[0056] In some embodiments, the present application can detect whether the actual number of layers angle is correct, and if the actual number of layers angle is incorrect, adjust the actual number of layers angle until the correct actual number of layers angle is obtained, and then lay up the long fiber layup composite material to obtain an irregular model of the long fiber layup composite material.

[0057] For example, embodiments of this application can use Hypermesh software to detect whether the actual ply information and the actual layer angle information are correct. Taking region 2 of the same thickness as an example, the 17th layer should be a ±45° ply. Figure 3 The long fiber layup information should be kept consistent. If it is incorrect, it should be corrected. In addition, the 0-degree layup direction of the long fibers should be consistent with the X direction of the local coordinate system. If the direction is incorrect, it should be readjusted until the correct position is achieved, until the modeling of the irregular model of the long fiber layup composite material is completed.

[0058] The working principle of the modeling method for irregular vehicle parts proposed in this application will be introduced below with reference to a specific embodiment.

[0059] in, Figure 6 This is a flowchart illustrating the working principle of a method for modeling irregular parts of a vehicle according to an embodiment of this application.

[0060] Step S601: Based on Hypermesh software, import the initial irregular model of long fiber layup composite material and cut the areas of the same thickness into a group.

[0061] Step S602: Select the base plane for the ply in an area of ​​the same thickness.

[0062] Step S603: Mesh the base plane using S4R elements.

[0063] In this embodiment, when the base plane does not meet certain planar conditions, S4R elements can be used to perform mesh generation, thereby optimizing the base plane and obtaining a base plane that meets certain planar conditions.

[0064] Step S604: Determine the 0° and 90° directions of the base plane long fiber layup.

[0065] Step S605: To ensure fiber layup continuity, a local coordinate system is established for each region of equal thickness.

[0066] In this embodiment of the application, the X and Z directions of the local coordinate system can be the 0° and 90° directions of the base plane.

[0067] Step S606: Determine the number and angle information of each layer of long fiber layup in the same thickness area.

[0068] Step S607: Create a set for each layer of layup units.

[0069] In this embodiment of the application, the set may include single-layer property information of long fiber layup composite materials.

[0070] Step S608: Determine the layup information and single-layer thickness of long fiber layups in areas of the same thickness.

[0071] Step S609: Establish the anisotropic material properties of long fiber composite materials.

[0072] Among them, the anisotropic material properties of long fiber composites can be understood as the material property information of long fiber layup composites, which may include, but are not limited to, the elastic modulus in the X direction, the elastic modulus in the Y direction, the shear modulus in the XY plane, the tensile strength in the X direction, the compressive strength in the X direction, the tensile strength in the Y direction, the compressive strength in the Y direction, the shear strength in the XY plane, and the material density, etc. This application does not impose specific limitations.

[0073] Step S610: Establish the single-layer property information and laminate of long fiber layup composite material.

[0074] In this embodiment, the Hypermesh software can be used to establish single-layer property information of long fiber layup composite material for each region of the same thickness, and these single-layer plates can be defined as laminates.

[0075] Step S611: Define the properties and stacking direction of the long fiber layup composite laminate.

[0076] In this application embodiment, the stacking direction of the laminate can be defined, and it is generally laid layer by layer along the normal direction of the shell unit.

[0077] Step S612: Determine whether the ply information and layer angles are correct.

[0078] In this embodiment, the Hypermesh software can be used to detect in real time whether the actual ply information and the actual number of layers and angles are correct, and if they are incorrect, adjustments can be made until the correct actual ply information and the actual number of layers and angles are obtained, thereby laying long fiber ply composite materials.

[0079] Step S613: The optimization of the initial irregular model of the long fiber layup composite material is completed, and the irregular model of the long fiber layup composite material is obtained.

[0080] According to the modeling method for irregular vehicle components proposed in this application, an initial irregular model of the long fiber layup composite material for the irregular vehicle component can be obtained first. Then, based on the initial irregular model, the region is divided according to the target thickness. The single-layer property information of the long fiber layup composite material is determined according to the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions. The long fiber layup composite material is then laid according to the single-layer property information, optimizing the initial irregular model of the long fiber layup composite material and constructing an irregular model of the long fiber layup composite material. This can accurately predict the structural performance of the composite material, effectively supporting the lightweighting of materials in the structure of new energy vehicles and improving the driving range. This solves the problems in related technologies, such as the inability of extracted mid-surfaces to accurately reflect the actual layup information, leading to inaccurate calculation results; and the inability of solid elements to represent the single-layer property information of the long fiber layup, making it impossible for simulation analysis results to evaluate the long fiber layup.

[0081] Next, referring to the accompanying drawings, a modeling apparatus for irregular vehicle parts according to an embodiment of this application is described.

[0082] Figure 7 This is a block diagram of a modeling device for irregular parts of a vehicle provided according to an embodiment of this application.

[0083] like Figure 7 As shown, the modeling device 10 for irregular parts of the vehicle includes: an acquisition module 100, a division module 200, and a construction module 300.

[0084] The acquisition module 100 is used to acquire an initial long fiber layup composite irregular model of at least one irregular component in the vehicle.

[0085] The partitioning module 200 is used to divide at least one irregular component into at least two sets of thickness regions according to the target thickness, based on the initial long fiber layup composite irregular model.

[0086] The construction module 300 is used to determine the single-layer property information of the long fiber layup composite material based on the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions, so as to lay up the long fiber layup composite material according to the single-layer property information, optimize the initial irregular model of the long fiber layup composite material, and construct an irregular model of the long fiber layup composite material of at least one irregular component.

[0087] Optionally, in one embodiment of this application, the construction module 300 includes: a first acquisition unit, a calculation unit, a second acquisition unit, and a first determination unit.

[0088] The first acquisition unit is used to acquire material property information of long fiber layup composite materials.

[0089] The calculation unit is used to calculate the layup information of long fiber layup composite materials based on single-layer thickness and region thickness.

[0090] The second acquisition unit is used to acquire the angle information of the long fiber layup composite material based on the layup information.

[0091] The first determining unit is used to determine the single-layer attribute information based on material property information, ply information, and angle information.

[0092] Optionally, in one embodiment of this application, the construction module 300 includes: a second determining unit, a third determining unit, a fourth determining unit, and a first construction unit.

[0093] The second determining unit is used to determine the stacking direction of each layer of long fiber layup composite material based on single-layer attribute information.

[0094] The third determining unit is used to obtain coordinate system information corresponding to different thickness regions, so as to determine the base plane for laying long fiber layup composite materials based on the coordinate system information.

[0095] The fourth determining unit is used to determine the layer number and angle information corresponding to the ply information in the single-layer attribute information based on the base plane and stacking direction.

[0096] The first building unit is used to lay up long fiber layup composite materials based on the base plane, stacking direction, layup information and layer angle information to establish an irregular model of long fiber layup composite materials.

[0097] Optionally, in one embodiment of this application, the construction module 300 includes: a third acquisition unit, a detection unit, and a second construction unit.

[0098] The third acquisition unit is used to acquire the actual layup information and / or actual layer angle information of the long fiber layup composite material.

[0099] The detection unit is used to detect whether the actual ply information and / or the actual number of layers and angle information are correct.

[0100] The second building unit is used to adjust the actual ply information and / or actual ply angle information using the base plane, stacking direction, ply information and ply angle information when the actual ply information and / or actual ply angle information are detected to be incorrect, until the correct actual ply information and / or correct actual ply angle information is obtained, so as to lay the long fiber ply composite material according to the correct actual ply information and / or correct actual ply angle information, until an irregular model of the long fiber ply composite material is obtained.

[0101] Optionally, in one embodiment of this application, the first construction unit includes: an acquisition subunit, a determination subunit, a judgment subunit, a first construction subunit, and a second construction subunit.

[0102] The sub-unit is used to obtain the horizontal coordinate direction of the corresponding thickness region.

[0103] Determine the sub-unit, which is used to determine the 0° direction of the corresponding long fiber layup composite material base plane based on the horizontal axis direction.

[0104] The judgment sub-unit is used to determine whether the base plane meets the preset plane conditions.

[0105] The first building subunit is used to optimize the base plane when the base plane does not meet the preset plane conditions until a base plane that meets the preset plane conditions is obtained. Based on the 0° direction, the base plane with preset plane conditions, the stacking direction, the layup information and the layer angle information, long fiber layup composite material is laid to obtain an irregular model of long fiber layup composite material.

[0106] The second construction subunit is used to lay long fiber layup composite material based on the 0° direction, the base plane, the stacking direction, the layup information and the layer angle information when the base plane meets the preset plane conditions, so as to obtain an irregular model of long fiber layup composite material.

[0107] It should be noted that the explanation of the above-described method for modeling irregular parts of a vehicle also applies to the modeling device for irregular parts of a vehicle in this embodiment, and will not be repeated here.

[0108] The modeling device for irregular vehicle components proposed in this application can first obtain an initial irregular model of the irregular long fiber layup composite material for the vehicle component. Then, based on the initial irregular model, regions are divided according to the target thickness. The single-layer property information of the long fiber layup composite material is determined according to the single-layer thickness of the long fiber layup composite material and the corresponding region thickness for different thickness regions. The long fiber layup composite material is then laid according to the single-layer property information, optimizing the initial irregular model and constructing a new irregular model of the long fiber layup composite material. This model can accurately predict the structural performance of the composite material, effectively supporting the lightweighting of materials in new energy vehicle structures and improving driving range. Therefore, it solves the problems in related technologies, such as the inaccurate reflection of actual layup information by extracting mid-surfaces, leading to inaccurate calculation results; and the inability of solid elements to represent the single-layer property information of long fiber layups, making it impossible to evaluate long fiber layups in simulation analysis results.

[0109] Figure 8 This is a schematic diagram of the structure of a vehicle according to an embodiment of this application. The vehicle may include: The memory 801, the processor 802, and the computer program stored on the memory 801 and capable of running on the processor 802.

[0110] When the processor 802 executes the program, it implements the modeling method for irregular vehicle parts provided in the above embodiments.

[0111] Furthermore, the vehicle also includes: Communication interface 803 is used for communication between memory 801 and processor 802.

[0112] The memory 801 is used to store computer programs that can run on the processor 802.

[0113] The memory 801 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0114] If the memory 801, processor 802, and communication interface 803 are implemented independently, then the communication interface 803, memory 801, and processor 802 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0115] Optionally, in a specific implementation, if the memory 801, processor 802, and communication interface 803 are integrated on a single chip, then the memory 801, processor 802, and communication interface 803 can communicate with each other through an internal interface.

[0116] The processor 802 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0117] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for modeling irregular parts of a vehicle.

[0118] This application also provides a computer program product, including a computer program that, when executed, implements the above-described method for modeling irregular parts of a vehicle.

[0119] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0120] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0121] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0122] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). In addition, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically by optically scanning paper or other media, followed by editing, interpreting or otherwise processing as necessary, and then stored in computer memory.

[0123] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or more of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0124] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0125] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0126] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for modeling irregular parts of a vehicle, characterized in that, Includes the following steps: Obtain an initial long fiber layup composite irregular model for at least one irregular component in a vehicle; Based on the initial long fiber layup composite irregular model, the at least one irregular component is divided into at least two sets of thickness regions according to the target thickness. Based on the single-layer thickness of the long fiber layup composite material and the corresponding region thickness of different thickness areas, the single-layer property information of the corresponding long fiber layup composite material is determined, so as to lay the long fiber layup composite material according to the single-layer property information, optimize the initial long fiber layup composite material irregular model, and construct the long fiber layup composite material irregular model of the at least one irregular component.

2. The method according to claim 1, characterized in that, The determination of single-layer property information of the long fiber layup composite material based on the single-layer thickness and the corresponding region thickness of different thickness regions includes: Obtain the material property information of the long fiber layup composite material; Based on the single-layer thickness and the region thickness, the layup information of the long fiber layup composite material is calculated; Based on the layup information, obtain the angle information of the long fiber layup composite material; Based on the material property information, the layup information, and the angle information, the single-layer property information is determined.

3. The method according to claim 1, characterized in that, The step of laying the long fiber layup composite material according to the single-layer attribute information, optimizing the initial irregular model of the long fiber layup composite material, and constructing the irregular model of the long fiber layup composite material for the at least one irregular component includes: Based on the single-layer attribute information, the stacking direction of each layer of long fiber layup composite material is determined; Obtain coordinate system information corresponding to the different thickness regions, so as to determine the base plane for laying the long fiber layup composite material based on the coordinate system information; Based on the base plane and the stacking direction, determine the layer number and angle information corresponding to the ply information in the single-layer attribute information; Based on the base plane, the stacking direction, the layup information, and the layer angle information, the long fiber layup composite material is laid up to establish an irregular model of the long fiber layup composite material.

4. The method according to claim 3, characterized in that, The step of laying the long fiber layup composite material according to the single-layer attribute information, optimizing the initial irregular model of the long fiber layup composite material, and constructing the irregular model of the long fiber layup composite material for the at least one irregular component includes: Obtain the actual layup information and / or actual layer number and angle information of the long fiber layup composite material; Check whether the actual ply information and / or the actual ply angle information are correct; If the actual ply information and / or the actual number of layers angle information are found to be incorrect, the actual ply information and / or the actual number of layers angle information are adjusted using the base plane, the stacking direction, the ply information, and the number of layers angle information until the correct actual ply information and / or the correct actual number of layers angle information are obtained. The long fiber ply composite material is then laid according to the correct actual ply information and / or the correct actual number of layers angle information until an irregular model of the long fiber ply composite material is obtained.

5. The method according to claim 3, characterized in that, The process of laying the long fiber layup composite material based on the base plane, the stacking direction, the layup information, and the layer angle information to establish an irregular model of the long fiber layup composite material includes: Obtain the x-coordinate direction of the corresponding thickness region; Based on the horizontal axis direction, determine the 0° direction for the corresponding long fiber layup composite material base plane laying; Determine whether the base plane meets the preset plane conditions; If the base plane does not meet the preset plane conditions, the base plane is optimized until a base plane that meets the preset plane conditions is obtained. Based on the 0° direction, the base plane with the preset plane conditions, the stacking direction, the layup information, and the layer angle information, the long fiber layup composite material is laid to obtain the irregular model of the long fiber layup composite material. If the base plane satisfies the preset plane condition, then based on the 0° direction, the base plane, the stacking direction, the layup information, and the layer angle information, the long fiber layup composite material is laid to obtain the irregular model of the long fiber layup composite material.

6. A modeling device for irregular parts of a vehicle, characterized in that, include: The acquisition module is used to acquire the initial long fiber layup composite irregular model of at least one irregular component in the vehicle. The partitioning module is used to divide the at least one irregular component into at least two sets of thickness regions according to the target thickness, based on the initial long fiber layup composite irregular model. The construction module is used to determine the single-layer property information of the long fiber layup composite material based on the single-layer thickness of the long fiber layup composite material and the region thickness corresponding to different thickness regions, so as to lay up the long fiber layup composite material according to the single-layer property information, optimize the initial irregular model of the long fiber layup composite material, and construct the irregular model of the long fiber layup composite material of the at least one irregular component.

7. The apparatus according to claim 6, characterized in that, The building module includes: The first acquisition unit is used to acquire the material property information of the long fiber layup composite material; The calculation unit is used to calculate the layup information of the long fiber layup composite material based on the single layer thickness and the region thickness. The second acquisition unit is used to acquire the angle information of the long fiber layup composite material based on the layup information; The first determining unit is used to determine the single-layer attribute information based on the material property information, the layup information, and the angle information.

8. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the modeling method for irregular parts of a vehicle as described in any one of claims 1-5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the modeling method for irregular parts of a vehicle as described in any one of claims 1-5.

10. A computer program product, characterized in that, Includes a computer program, which, when executed, is used to implement the modeling method for irregular parts of a vehicle as described in any one of claims 1-5.

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