A method, device, medium and equipment for constructing a vehicle collision simulation model

Abstract

The present application discloses a method, device, medium and equipment for constructing a car collision simulation model. The method includes establishing a whole vehicle collision condition simulation model based on simulation software; dividing the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole vehicle collision condition simulation model; calculating the mechanical parameters of the cells based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cells; wherein the mechanical parameters of the cells include the stiffness information of the cells and the interaction information between adjacent cells; inputting the mechanical parameters of the cells into the initial simplified model to obtain a simplified collision condition simulation model; namely, dividing the whole vehicle collision condition simulation model into multiple cells, and calculating the stiffness information of the cells and the interaction information between adjacent cells to clarify the energy transfer mode of each cell, thereby simplifying the simulation model while ensuring the accuracy of the simulation calculation, so as to improve the efficiency of the simulation calculation.

Description

Technical Field

[0001] The present application relates to the technical field of automobile collision simulation, and in particular to a method, device, medium and equipment for constructing an automobile collision simulation model. Background Art

[0002] Passive safety of automobiles refers to the performance of the vehicle in effectively protecting the occupants in the vehicle or pedestrians outside the vehicle from injury or minimizing the degree of injury when a traffic accident occurs. In order to improve the passive safety of the vehicle, the body structure must be reasonably designed so that it can produce reasonable deformation and fully absorb the collision energy when a collision occurs. In the design and optimization process of the body structure, the method of combining real vehicle tests with finite element simulation analysis is currently widely used. Finite element simulation analysis uses a computer to perform virtual collision tests to obtain the deformation process and collision response of the body, and then designs and improves the body structure. Since the finite element method can reduce the number of real vehicle tests, improve development efficiency and greatly save development costs, it is widely used.

[0003] The number of nodes in the traditional vehicle collision finite element model is huge, and even with a high-performance computer, each calculation usually takes several hours. When there are many design schemes or structural improvements, the finite element model often needs to be repeatedly modified and verified, which requires a lot of model modification and calculation time, making the entire development process time-consuming and labor-intensive. In order to reduce the model size and shorten the solution time, simplified finite element models have been widely used, but all the model simplification methods proposed so far simply intercept and supplement the definition of the moment of inertia, without fully considering the energy transfer distribution of the collision structure, which leads to poor simulation results. Therefore, there is an urgent need for a method that can ensure simulation accuracy while improving simulation efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a method, device, medium and equipment for constructing a vehicle collision simulation model.

[0005] According to one aspect of the present application, a method for constructing a car collision simulation model is provided, comprising: establishing a whole-vehicle collision condition simulation model based on simulation software; dividing the whole-vehicle collision condition simulation model into a plurality of cells to obtain an initial simplified model of the whole-vehicle collision condition simulation model; wherein the cells comprise empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole-vehicle collision condition simulation model; calculating the mechanical parameters of the cells based on the simulation results of the whole-vehicle collision condition simulation model and the size information of the cells; wherein the mechanical parameters of the cells comprise the stiffness information of the cells and the interaction information between adjacent cells; and inputting the mechanical parameters of the cells into the initial simplified model to obtain a simplified collision condition simulation model.

[0006] In one embodiment, dividing the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole vehicle collision condition simulation model includes: dividing the whole vehicle collision condition simulation model into a deformation area and a non-deformation area; dividing the deformation area of ​​the whole vehicle collision condition simulation model into multiple cells to obtain the initial simplified model of the whole vehicle collision condition simulation model.

[0007] In one embodiment, the calculation of the mechanical parameters of the cell based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cell includes: calculating the stiffness information of the cell based on the mass density, Young's modulus, shear modulus, bulk modulus, yield strength, ultimate strength, breaking point and Poisson's ratio of the automobile parts contained in the cell.

[0008] In one embodiment, the calculation of the mechanical parameters of the cell based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cell includes: calculating the distribution factor of the cell in each direction; wherein the distribution factor represents the proportion of the energy of the cell transmitted along the corresponding direction, and the sum of the distribution factors in all directions is equal to one; based on the distribution factor and the total transmission energy of the cell, calculating the energy transmitted from the cell to the adjacent cell.

[0009] In one embodiment, calculating the distribution factor of the cell in each direction includes: if the material of the vehicle parts corresponding to the cell and the adjacent cells are the same, then based on the number of adjacent cells of the cell and the contact area between the cell and the adjacent cells, calculating the distribution factor of the cell in each direction; wherein the contact area between the cell and the adjacent cells is positively correlated with the distribution factor in the corresponding direction.

[0010] In one embodiment, calculating the distribution factor of the cell in each direction includes: if the connection direction between the cell and the adjacent cells is the main direction of the collision load, and there is continuity of vehicle component material between the cell and the adjacent cells, then the distribution factor in the connection direction between the cell and the adjacent cells is greater than the distribution factors in other directions.

[0011] In one embodiment, dividing the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole vehicle collision condition simulation model includes: determining the boundary position of the cell based on the overlapping interface position of the collision test; dividing the whole vehicle collision condition simulation model into multiple cells according to the boundary position of the cell to obtain the initial simplified model.

[0012] According to another aspect of the present application, a device for constructing a car collision simulation model is provided, comprising: a simulation model establishment module, for establishing a whole-vehicle collision condition simulation model based on simulation software; a simulation model segmentation module, for segmenting the whole-vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole-vehicle collision condition simulation model; wherein the cells comprise empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole-vehicle collision condition simulation model; a mechanical parameter calculation module, for calculating the mechanical parameters of the cells based on the simulation results of the whole-vehicle collision condition simulation model and the size information of the cells; wherein the mechanical parameters of the cells include the stiffness information of the cells and the interaction information between adjacent cells; a simulation model simplification module, for inputting the mechanical parameters of the cells into the initial simplified model to obtain a simplified collision condition simulation model.

[0013] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute any of the above-mentioned methods for constructing a vehicle collision simulation model.

[0014] According to another aspect of the present application, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; and the processor is used to execute any of the above-mentioned methods for constructing a vehicle collision simulation model.

[0015] The present application provides a method, device, medium and equipment for constructing a car collision simulation model. The method establishes a whole-vehicle collision condition simulation model based on simulation software; divides the whole-vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole-vehicle collision condition simulation model; wherein the cells include empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole-vehicle collision condition simulation model; based on the simulation results of the whole-vehicle collision condition simulation model and the size information of the cells, the mechanical parameters of the cells are calculated; wherein the mechanical parameters of the cells include the stiffness information of the cells and the interaction information between adjacent cells; the mechanical parameters of the cells are input into the initial simplified model to obtain a simplified collision condition simulation model; that is, the whole-vehicle collision condition simulation model is divided into multiple cells, and the stiffness information of the cells and the interaction information between adjacent cells are calculated to clarify the energy transfer mode of each cell, thereby simplifying the simulation model while ensuring the accuracy of the simulation calculation, so as to improve the efficiency of the simulation calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 It is a flowchart of a method for constructing a car collision simulation model provided by an exemplary embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the size parameter structure of a cell in the Y-axis direction of a car collision simulation model provided by an exemplary embodiment of the present application.

[0019] Figure 3 It is a schematic diagram of the structural division of deformation area and non-deformation area of ​​a car collision simulation model provided by an exemplary embodiment of the present application.

[0020] Figure 4 It is a schematic diagram of the cell energy change structure of a car collision simulation model provided by an exemplary embodiment of the present application.

[0021] Figure 5 It is a schematic diagram of the cell interaction structure of the front anti-collision beam in the automobile collision simulation model provided by an exemplary embodiment of the present application.

[0022] Figure 6 It is a structural schematic diagram of a device for constructing a car collision simulation model provided by an exemplary embodiment of the present application.

[0023] Figure 7 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0024] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0025] Figure 1 FIG. 1 is a flow chart of a method for constructing a vehicle collision simulation model provided by an exemplary embodiment of the present application. Figure 1 As shown, the method for constructing the automobile collision simulation model includes the following steps:

[0026] Step 110: Based on the simulation software, a whole vehicle collision condition simulation model is established.

[0027] First, the application defines a global reference coordinate system, with the ground as the reference plane, and defines the main transmission direction of the vehicle force as the positive direction of the X-axis. For example, in a head-on collision, the direction from the front to the rear of the vehicle is the positive direction of the X-axis, the direction parallel to the reference plane and perpendicular to the X-axis is the Y-axis direction, and the direction perpendicular to the reference plane is the Z-axis direction, so as to determine the vehicle basic coordinate system. Then, the application establishes a complete vehicle collision condition simulation model through computer simulation software, and the vehicle collision condition simulation model can obtain structural deformation data information during vehicle collision, and can simulate the real vehicle collision behavior, which includes the physical characteristics and parameters of the vehicle. The whole vehicle collision condition simulation model can be a whole vehicle model established based on finite element software according to collision regulations and standards, wherein the finite element software includes but is not limited to Perimer, HyperWorks, ANSA, etc., and the collision regulations include but are not limited to 50 km 100% frontal collision (50FRB), 50 km 40% overlap deformable barrier collision (64ODB), 50% overlap moving progressive deformation barrier collision test (50MPDB), 60 km side collision (60AEMDB), 32 km cylindrical collision (32POLE) and other conditions.

[0028] Step 120: Divide the whole vehicle collision condition simulation model into a plurality of cells to obtain an initial simplified model of the whole vehicle collision condition simulation model.

[0029] Among them, the cells include empty cells and component cells. The empty cells do not contain automobile parts, and the component cells contain automobile parts and are composed of nodes of the whole vehicle collision condition simulation model. Specifically, the cells in the present application are hexahedral in shape (such as a cuboid), and the volume and shape of each cell may be different. The present application divides the whole vehicle collision condition simulation model from the X-axis, Y-axis and Z-axis directions to obtain multiple cells. Among them, the component cell refers to the cell containing the automobile component area, the empty cell refers to the cell not containing the automobile component, the zero cell has no state equation and has no ability to absorb or transmit energy under its initial conditions.

[0030] In one embodiment, the specific implementation method of the above step 120 may be: based on the overlapping interface position of the collision test, determine the boundary position of the cell; according to the boundary position of the cell, divide the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model.

[0031] Specifically, the size parameters of the cell in the Y-axis direction are determined by the constraints of the collision conditions. Therefore, the boundary conditions of the Y-axis direction parameters are defined according to the constraints. For example, the collision speed and impact contact area in the 50FRB and 64ODB conditions are different. The overlap parameters between the vehicle and the obstacle are defined as the boundary conditions of the Y-axis direction parameters of the cell volume. Taking the frontal collision as an example, Figure 2 As shown in the figure, y0 is the reference axis, y1 and −y1 are the overlapping section positions in the 64ODB overlap collision test, and y2 and −y2 are the boundary conditions of the 64ODB overlap collision test. Based on the defined boundary conditions, each component is divided into n parts in the Y-axis direction according to the shape and material properties of each component. Based on the size parameters of the cell in the Y-axis direction, the size parameters in the Z-axis and X-axis directions are further defined to complete the size definition of the cell. Specifically, each component is divided into multiple cells according to the shape and material properties of each component, and the size parameters of the cell in the Z-axis and X-axis directions cannot be greater than its size parameters in the Y-axis direction. In the segmentation process, the material type, geometric shape, contact characteristics, etc. of the component area are highly consistent, and the use of zero cells further simplifies the model, greatly simplifying the calculation efficiency of the model.

[0032] Step 130: Calculate the mechanical parameters of the cell based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cell.

[0033] Among them, the mechanical parameters of the cell include the stiffness information of the cell and the interaction information between adjacent cells. In a collision scenario, the behavior of each cell can be defined by a function of the time relationship between input energy, energy dissipation and energy transfer. The model composed of all cells obeys the law of conservation of energy. In a collision scenario, the total energy is eventually absorbed in various forms and eventually dissipated. Based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cell, this application calculates the stiffness information of the cell and the interaction information between adjacent cells to determine the energy transfer function relationship of each cell, thereby realizing the simulation calculation of the collision condition.

[0034] Step 140: Input the mechanical parameters of the cell into the initial simplified model to obtain a simplified simulation model of the collision condition.

[0035] After calculating the mechanical parameters of the unit cell (component unit cell), the present application inputs the mechanical parameters of the unit cell into the initial simplified model to obtain a simplified simulation model of the collision condition.

[0036] The present application provides a method for constructing a car collision simulation model. The method includes establishing a whole-vehicle collision condition simulation model based on simulation software; dividing the whole-vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole-vehicle collision condition simulation model; wherein the cells include empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole-vehicle collision condition simulation model; calculating the mechanical parameters of the cells based on the simulation results of the whole-vehicle collision condition simulation model and the size information of the cells; wherein the mechanical parameters of the cells include the stiffness information of the cells and the interaction information between adjacent cells; inputting the mechanical parameters of the cells into the initial simplified model to obtain a simplified collision condition simulation model; that is, dividing the whole-vehicle collision condition simulation model into multiple cells, and calculating the stiffness information of the cells and the interaction information between adjacent cells to clarify the energy transfer mode of each cell, thereby simplifying the simulation model while ensuring the accuracy of the simulation calculation, so as to improve the efficiency of the simulation calculation.

[0037] In one embodiment, the specific implementation method of the above step 120 can be: dividing the whole vehicle collision condition simulation model into a deformation area and a non-deformation area; dividing the deformation area of ​​the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole vehicle collision condition simulation model.

[0038] Among them, the deformation area is the area where the structure deforms when the vehicle collides. The cells in the deformation area are non-rigid and can transmit or absorb energy. The non-deformation area is the area where no obvious deformation occurs when the vehicle collides. The non-deformation area is a rigid area, and its properties are that it does not deform and cannot transmit or absorb energy. Figure 3As shown, the present application divides the vehicle into a deformation area (grid line area in the figure) and a non-deformation area, and divides the deformation area into multiple cells to simplify the whole vehicle collision condition simulation model as much as possible.

[0039] The whole vehicle collision condition simulation model has the geometric information of all parts, sub-assemblies and components in the vehicle structure. Its most basic expression is represented by the form of node coordinates, that is, the nodes are expressed by coordinates, and these nodes form different elements. This application combines the elements in the whole vehicle collision condition simulation model into parts, and the parts are combined into components to finally complete the characterization of the vehicle. The mathematical parameterization of the simplified model can be completed using the node coordinate information in the whole vehicle collision condition simulation model. The specific mathematical parameterization relationship function is as follows:

[0040]

[0041] in, N is a system consisting of i nodes and their corresponding coordinates. X i , Y i , Z i Composition i ×4 matrix, E is a j shell elements and represents the shell element thickness t j (for 2D shell elements only) and the corresponding nodes that make up the shell element [ N a , N b , N c , …] j×m matrix, A sub is a k×n Matrix, by k Parts, materials representing the parts M x and its components[ E a , E b , E c ,…]composition, A Is l Subcomponents A subx Composition l ×1 matrix.

[0042] In one embodiment, the specific implementation method of the above step 130 can be: based on the mass density, Young's modulus, shear modulus, bulk modulus, yield strength, ultimate strength, breaking point and Poisson's ratio of the automobile parts contained in the cell, the stiffness information of the cell is calculated.

[0043] This application defines the behavior of a cell to establish a mathematical function that qualitatively represents the stiffness properties of each cell. In a collision scenario, the behavior of each cell is defined by a function of the time relationship between input energy, energy dissipation, and energy transfer. The model composed of all cells obeys the law of conservation of energy, and the total energy is eventually absorbed and dissipated in various forms. The behavior of a cell can usually be expressed as Figure 4 The relationship between energy absorption and energy transfer is shown in the figure, where E is the input energy and E a is the absorbed energy, E t is the energy transferred, E x is the energy at the beginning of the transmission, E s is the energy absorbed at the end.

[0044] This application defines the stiffness information of each cell through a material function. Since a cell may contain components composed of different materials, this application provides a function equation to characterize the component material:

[0045] M =[ ρ, Y , G , K, σ y , σ u , σ f ，v ];

[0046] in, ρ is the mass density, Y , G and K are Young's modulus, shear modulus and bulk modulus, respectively. σ y , σ u and σ f are the yield strength, ultimate strength and breaking point, respectively. v is Poisson's ratio.

[0047] In one embodiment, the specific implementation method of the above step 130 may be: calculating the distribution factor of the cell in each direction; wherein the distribution factor represents the proportion of the energy of the cell transmitted along the corresponding direction, and the sum of the distribution factors in all directions is equal to one; based on the distribution factor and the total transmission energy of the cell, calculating the energy transmitted from the cell to the adjacent cell.

[0048] In the collision scenario, the energy transmitted by the cells in the deformation area is the result of the interaction between the cells, which satisfies the law of energy conservation. The way the cells interact with each other is determined by the time relationship function between energy input, energy dissipation and energy transmission. The distribution factor of the cell in each direction is calculated to determine the amount of energy transmitted by the cell in each direction, thereby determining the amount of energy transmission between the cells. Among them, energy cannot be transmitted in the negative direction of the X-axis, that is, energy cannot be transmitted from away from the collision end to the collision end. The area without cells does not have any energy transmission ability. The sum of the distribution factors of the same cell in all directions is equal to one. Specifically, the calculation formula for the energy transmitted by the cell in each direction is as follows:

[0049] ;

[0050] Where i={x, y, y′, z, z′}, x, y, z, y′ and z′ are the positive direction of the X axis, the positive direction of the Y axis, the positive direction of the Z axis, the negative direction of the Y axis and the negative direction of the Z axis respectively. For the i The energy transmitted in each direction, is the total transmitted energy of a unit, For the i The distribution factor in each direction, .

[0051] In one embodiment, a specific implementation method for calculating the distribution factor of a cell in each direction may be: if the material of the vehicle parts corresponding to a cell and an adjacent cell is the same, then the distribution factor of the cell in each direction is calculated based on the number of adjacent cells of the cell and the contact area between the cell and the adjacent cells; wherein the contact area between the cell and the adjacent cells is positively correlated with the distribution factor in the corresponding direction.

[0052] In a collision scenario, if the material properties of adjacent cells are the same, the distribution factor of the cells in each direction is calculated based on the number of adjacent cells and the contact area between cells to determine the proportion of energy transmitted by the cells in each direction, thereby calculating the amount of energy transmitted by the cells in each direction.

[0053] In one embodiment, a specific implementation method for calculating the distribution factor of a cell in each direction may be: if the connection direction between a cell and an adjacent cell is the main direction of the collision load, and there is continuity of vehicle component material between the cell and the adjacent cells, then the distribution factor in the connection direction between the cell and the adjacent cells is greater than the distribution factors in other directions.

[0054] In a collision scenario, if there is continuity of vehicle component material between cells and adjacent cells and the connection direction between the adjacent cells is the main direction of the collision load (i.e., the main direction of collision force transmission), the distribution factor in the connection direction (X-axis direction) between the cells and adjacent cells is set to be greater than the distribution factors in other directions.

[0055] The following is an example of the interaction between cells of the front anti-collision beam of a vehicle:

[0056] like Figure 5 As shown, cell A1 has three adjacent cells A2, B1 and B2, and an interaction model is defined for each pair of adjacent cells. Cells A1 and A2 are connected along the X-axis direction, and there is continuity of vehicle component materials between them. Since the main force transmission direction is the X-axis direction, the energy distribution factor on the X-axis is much higher than in other directions; cells A1 and B1 are connected along the Y-axis direction and have material continuity, and cell A1 is located farther than cell B1 (farther from the reference axis y0), that is, relative to B1, B1 directly collides and transmits energy earlier. Referring to the boundary conditions, in order to eliminate backflow, this application initializes the energy distribution factor on the Y-axis of cell A1 to 0; cells A1 and B2 are connected along the Y-axis direction, but A1 and B2 do not have material continuity, so there is no energy transfer, and the energy distribution factor of cell A1 along the Y-axis is initialized to 0. In summary, according to the condition of the sum of the distribution factors, the factor x will be initialized to 1, which means that the energy transfer from cell A1 can only be transferred to cell A2 along the X-axis direction.

[0057] like Figure 5 As shown, cell B1 has two adjacent cells A1 and B2. B1 and A1 are connected along the negative Y-axis direction (y′) and have continuity of vehicle component materials, and cells B1 and B2 are connected along the negative X-axis direction, but there is no continuity of vehicle component materials. Therefore, the transmission factor of cell B1 in the negative Y-axis direction will be set to 1, and the other factors will be set to 0.

[0058] like Figure 5 As shown, cell D1 has three adjacent cells C1, D2, and E1. Since there is no continuity of vehicle component material between D1 and D2, the transfer factor between them is set to 0; both C1 and E1 have material continuity from D1, and according to the boundary conditions, the factors in each direction should be proportional to the cross-sectional area of ​​the component at the common boundary of the adjacent cells, that is:

[0059] ,

[0060] ,

[0061] in is the cross-sectional area of ​​the component at the common boundary between cells D1 and E1, is the cross-sectional area of ​​the component at the common boundary between cells D1 and C1, and are the transmission factors of cell D1 in the y and y′ directions, respectively.

[0062] Figure 6 FIG. 1 is a schematic diagram of a structure of a device for constructing a vehicle collision simulation model provided by an exemplary embodiment of the present application. Figure 6 As shown, the construction device 60 of the automobile collision simulation model includes: a simulation model establishment module 61, which is used to establish a whole vehicle collision condition simulation model based on simulation software; a simulation model segmentation module 62, which is used to segment the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole vehicle collision condition simulation model; wherein the cells include empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole vehicle collision condition simulation model; a mechanical parameter calculation module 63, which is used to calculate the mechanical parameters of the cells based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cells; wherein the mechanical parameters of the cells include the stiffness information of the cells and the interaction information between adjacent cells; a simulation model simplification module 64, which is used to input the mechanical parameters of the cells into the initial simplified model to obtain a simplified collision condition simulation model.

[0063] The present application provides a device for constructing a car collision simulation model, which establishes a whole-vehicle collision condition simulation model based on simulation software through a simulation model establishment module 61; a simulation model segmentation module 62 segments the whole-vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole-vehicle collision condition simulation model; wherein the cells include empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole-vehicle collision condition simulation model; a mechanical parameter calculation module 63 calculates the mechanical parameters of the cells based on the simulation results of the whole-vehicle collision condition simulation model and the size information of the cells; wherein the mechanical parameters of the cells include the stiffness information of the cells and the interaction information between adjacent cells; a simulation model simplification module 64 inputs the mechanical parameters of the cells into the initial simplified model to obtain a simplified collision condition simulation model; that is, the whole-vehicle collision condition simulation model is segmented into multiple cells, and the stiffness information of the cells and the interaction information between adjacent cells are calculated to clarify the energy transfer mode of each cell, thereby simplifying the simulation model while ensuring the accuracy of the simulation calculation, so as to improve the efficiency of the simulation calculation.

[0064] In one embodiment, the above-mentioned simulation model segmentation module 62 can be further configured to: divide the whole vehicle collision condition simulation model into a deformation area and a non-deformation area; divide the deformation area of ​​the whole vehicle collision condition simulation model into multiple cells to obtain an initial simplified model of the whole vehicle collision condition simulation model.

[0065] In one embodiment, the mechanical parameter calculation module 63 can be further configured to calculate the stiffness information of the cell based on the mass density, Young's modulus, shear modulus, bulk modulus, yield strength, ultimate strength, breaking point and Poisson's ratio of the automobile parts contained in the cell.

[0066] In one embodiment, the mechanical parameter calculation module 63 can be further configured to: calculate the distribution factor of the cell in each direction; wherein the distribution factor represents the proportion of the energy of the cell transmitted along the corresponding direction, and the sum of the distribution factors in all directions is equal to one; based on the distribution factor and the total transmission energy of the cell, calculate the energy transmitted from the cell to the adjacent cell.

[0067] In one embodiment, the mechanical parameter calculation module 63 can be further configured as follows: if the material of the vehicle parts corresponding to the cell and the adjacent cells is the same, then the distribution factor of the cell in each direction is calculated based on the number of adjacent cells of the cell and the contact area between the cell and the adjacent cells; wherein the contact area between the cell and the adjacent cells is positively correlated with the distribution factor in the corresponding direction.

[0068] In one embodiment, the mechanical parameter calculation module 63 can be further configured as follows: if the connection direction between a cell and an adjacent cell is the main direction of the collision load, and the cell and the adjacent cell are continuous vehicle component materials, then the distribution factor in the connection direction between the cell and the adjacent cell is greater than the distribution factors in other directions.

[0069] In one embodiment, the simulation model segmentation module 62 may be further configured to: determine the boundary position of the cell based on the overlapping interface position of the collision test; and segment the whole vehicle collision condition simulation model into multiple cells according to the boundary position of the cell to obtain an initial simplified model.

[0070] Below, reference Figure 7 The electronic device according to the embodiment of the present application is described. The electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the collected input signal from them.

[0071] Figure 7 A block diagram of an electronic device according to an embodiment of the present application is illustrated.

[0072] like Figure 7As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0073] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0074] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may run the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0075] In one example, the electronic device 10 may further include: an input device 13 and an output device 14 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0076] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, which is used to receive the collected input signals from the first device and the second device.

[0077] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0078] The output device 14 can output various information to the outside, including the determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0079] Of course, to simplify, Figure 7 Only some of the components related to the present application in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 10 may also include any other appropriate components.

[0080] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0081] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0082] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps of the method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0083] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0084] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0085] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0086] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0087] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0088] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for constructing a vehicle collision simulation model, characterized in that: include: Based on the simulation software, establish the whole vehicle collision condition simulation model; The whole vehicle collision working condition simulation model is divided into a plurality of cells to obtain an initial simplified model of the whole vehicle collision working condition simulation model; wherein the cells include empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole vehicle collision working condition simulation model; Based on the simulation results of the whole vehicle collision condition simulation model and the size information of the cell, the mechanical parameters of the cell are calculated; wherein the mechanical parameters of the cell include the stiffness information of the cell and the interaction information between adjacent cells; The mechanical parameters of the cell are input into the initial simplified model to obtain a simplified simulation model of the collision condition.

2. The method for constructing a vehicle collision simulation model according to claim 1, characterized in that: The step of dividing the whole vehicle collision working condition simulation model into a plurality of cells to obtain an initial simplified model of the whole vehicle collision working condition simulation model comprises: The whole vehicle collision condition simulation model is divided into a deformation area and a non-deformation area; The deformation region of the whole vehicle collision working condition simulation model is divided into a plurality of cells to obtain an initial simplified model of the whole vehicle collision working condition simulation model.

3. The method for constructing a vehicle collision simulation model according to claim 1, characterized in that: The calculating of the mechanical parameters of the cell based on the simulation result of the whole vehicle collision working condition simulation model and the size information of the cell comprises: The stiffness information of the cell is calculated based on the mass density, Young's modulus, shear modulus, bulk modulus, yield strength, ultimate strength, breaking point and Poisson's ratio of the automobile parts contained in the cell.

4. The method for constructing a vehicle collision simulation model according to claim 1, characterized in that: The calculating of the mechanical parameters of the cell based on the simulation result of the whole vehicle collision working condition simulation model and the size information of the cell comprises: Calculating the distribution factor of the cell in each direction; wherein the distribution factor represents the proportion of the energy of the cell transmitted along the corresponding direction, and the sum of the distribution factors in all directions is equal to one; The energy transmitted from the cell to the adjacent cells is calculated based on the distribution factor and the total transmitted energy of the cell.

5. The method for constructing a vehicle collision simulation model according to claim 4, characterized in that: The calculating the distribution factor of the cell in each direction comprises: If the material of the vehicle parts corresponding to the cell and the adjacent cells is the same, the distribution factor of the cell in each direction is calculated based on the number of adjacent cells of the cell and the contact area between the cell and the adjacent cells; wherein the contact area between the cell and the adjacent cells is positively correlated with the distribution factor in the corresponding direction.

6. The method for constructing a vehicle collision simulation model according to claim 4, characterized in that: The calculating the distribution factor of the cell in each direction comprises: If the connection direction between the cell and the adjacent cells is the main direction of the collision load, and there is continuity between the cell and the adjacent cells of the vehicle component material, the distribution factor in the connection direction between the cell and the adjacent cells is greater than the distribution factors in other directions.

7. The method for constructing a vehicle collision simulation model according to claim 1, characterized in that: The step of dividing the whole vehicle collision working condition simulation model into a plurality of cells to obtain an initial simplified model of the whole vehicle collision working condition simulation model comprises: Determining the boundary position of the cell based on the overlapping interface position of the collision test; According to the boundary positions of the cells, the whole vehicle collision working condition simulation model is divided into a plurality of cells to obtain the initial simplified model.

8. A device for constructing a vehicle collision simulation model, characterized in that: include: A simulation model building module is used to build a whole vehicle collision condition simulation model based on simulation software; A simulation model segmentation module, used for segmenting the whole vehicle collision condition simulation model into a plurality of cells to obtain an initial simplified model of the whole vehicle collision condition simulation model; wherein the cells include empty cells and component cells, the empty cells do not contain automobile components, and the component cells contain automobile components and are composed of nodes of the whole vehicle collision condition simulation model; A mechanical parameter calculation module, used to calculate the mechanical parameters of the cell based on the simulation results of the whole vehicle collision working condition simulation model and the size information of the cell; wherein the mechanical parameters of the cell include the stiffness information of the cell and the interaction information between adjacent cells; The simulation model simplification module is used to input the mechanical parameters of the cell into the initial simplified model to obtain a simplified simulation model of the collision condition.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to execute the method for constructing a vehicle collision simulation model as described in any one of claims 1 to 7.

10. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is used to execute the method for constructing the automobile collision simulation model described in any one of claims 1 to 7.

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