Simulation model generation method and device, electronic equipment and vehicle

Abstract

The invention provides a simulation model generation method and device, electronic equipment and a vehicle, and the method comprises the steps: obtaining the collision simulation data of the vehicle about a body in white, a left front door, a left rear door, tires and target position glass, the whole vehicle mass, the whole vehicle mass center coordinate and the mass of a target part; the method comprises the following steps: performing grid division on a body-in-white, a left front door, a left rear door, tires and target position glass through collision simulation data to obtain target grid units, generating an initial grid finite element collision simulation model through the target grid units and the collision simulation data, and balancing the mass of a target part to the initial grid finite element collision simulation model to obtain a target part collision simulation model. According to the method, the target mesh finite element collision simulation model is obtained, the simulation mass and centroid coordinates of the target mesh finite element collision simulation model are obtained, if the simulation mass is equal to the mass of the whole vehicle and the simulation centroid coordinates are consistent with the centroid coordinates of the whole vehicle, it is determined that the target mesh finite element collision simulation model is successfully built, and the building efficiency of the simulation model is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a simulation model generation method, device, electronic equipment and vehicle. Background Art

[0002] Model complexity and computational efficiency are key challenges in full-vehicle crash safety simulation. Modern vehicle crash simulations not only need to consider the structural strength and deformation behavior of the body-in-white (BIW), but also integrate multiple component subsystems, including openings and closing elements (such as doors, hoods, and trunk lids), powertrains (such as engines, electric motors, and transmissions), battery packs (especially for electric vehicles), fuel tanks (for gasoline vehicles), and front and rear suspension systems.

[0003] However, the inclusion of these component subsystems makes simulation models incredibly complex. For example, the powertrain may displace or rotate in a collision, the battery pack may be squeezed or impacted, and the fuel tank may rupture. These interactions must be simulated using contact algorithms and connection elements (such as welds and bolts), further increasing computational complexity. Furthermore, each component subsystem requires a fine mesh to ensure accurate simulation results. This significantly increases the number of meshes required to build the simulation model, leading to a sharp increase in computing resources and a significant decrease in simulation efficiency. Summary of the Invention

[0004] In view of this, the present application aims to propose a simulation model generation method, device, electronic device, and vehicle to solve the problem that current collision safety simulation models are not only complex but also time-consuming to build, resulting in low simulation efficiency. The specific technical solutions are as follows: According to a first aspect of the present application, a simulation model generation method is provided, the method comprising: Obtain the vehicle's collision simulation data on the body-in-white, left front door, left rear door, tires, and target position glass, as well as the vehicle's mass, vehicle center of mass coordinates, and the mass of target components; Meshing the body-in-white, left front door, left rear door, tires, and target position glass using the collision simulation data to obtain target mesh units; Generate an initial mesh finite element collision simulation model using the target mesh unit and the collision simulation data; Balancing the mass of the target component to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model; Obtaining the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model; If the simulated mass is equal to the vehicle mass, and the simulated center of mass coordinates are consistent with the vehicle center of mass coordinates, it is determined that the target grid finite element collision simulation model is successfully built.

[0005] Optionally, the collision simulation data includes computer-aided design model data, the computer-aided design model data includes geometric data, and the target position glass includes a front windshield, a sunroof, and a triangular window. Meshing the body in white, the left front door, the left rear door, the tire, and the target position glass using the collision simulation data to obtain target mesh units includes: Acquiring geometric data on the body-in-white, left front door, left rear door, tires, front windshield, sunroof glass, and triangular window glass from the collision simulation data; Meshing the body in white, the left front door, the left rear door, the tire, the front windshield, the sunroof glass, and the triangular window glass according to a preset strategy, and determining the mesh accuracy of the body in white, the left front door, the left rear door, the tire, the front windshield, the sunroof glass, and the triangular window glass; A limited number of target grid cells of the body-in-white, left front door, left rear door, tire, front windshield, sunroof glass and triangular window glass are obtained according to the geometric data and the grid accuracy.

[0006] Optionally, the target parts include but are not limited to the engine hood, front suspension, range extender, front bumper, cooling module, instrument panel tube beam, right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, target body interior parts, target body exterior parts and electrical appliances in the passenger compartment.

[0007] Optionally, before balancing the mass of the target component to the initial mesh finite element collision simulation model to obtain the target mesh finite element collision simulation model, the method further includes: Obtaining the installation position of the target component on the vehicle; The mass of the target component is determined by the installation position at the counterweight position of the initial mesh finite element collision simulation model.

[0008] Optionally, determining the mass of the target component at a counterweight position of the initial mesh finite element collision simulation model according to the installation position includes: Determining the counterweight position of the masses of the engine hood, front suspension, range extender, front bumper and cooling module at the front cabin structure of the body-in-white in the initial mesh finite element crash simulation model by the installation position; Determining the counterweight position of the mass of the instrument panel tube beam at the front panel of the body-in-white in the initial mesh finite element collision simulation model according to the installation position; Determining the counterweight position of the mass of the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, and electrical appliances in the passenger compartment at the floor of the body-in-white of the initial mesh finite element collision simulation model based on the installation position; The counterweight positions of the masses of the target vehicle body interior components and the target vehicle body exterior components are determined on the body-in-white of the initial mesh finite element collision simulation model by the installation positions.

[0009] Optionally, determining the counterweight position of the mass of the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, and electrical appliances in the passenger compartment based on the installation positions at the floor of the body-in-white of the initial mesh finite element collision simulation model includes: Determining the counterweight position of the mass of the right front door at the right front floor of the body-in-white of the initial mesh finite element collision simulation model through the installation position; Determining the counterweight position of the mass of the right rear door at the right rear floor of the body-in-white of the initial mesh finite element collision simulation model through the installation position; Determining different mapping positions of the battery pack, the fuel tank, the rear suspension, the rear motor, the tailgate, the front / rear seats, and the electrical appliances in the passenger compartment on the floor of the body-in-white of the initial mesh finite element collision simulation model according to the installation positions; The counterweight position of the mass of the battery pack, the fuel tank, the rear suspension, the rear motor, the tailgate, the front / rear seats and the electrical appliances in the passenger compartment on the floor of the white body of the initial mesh finite element collision simulation model is determined by different mapping positions.

[0010] Optionally, after obtaining the simulation quality and simulation center of mass coordinates of the target mesh finite element collision simulation model, the method further includes: If the simulation mass is not equal to the vehicle mass and / or the simulation center of mass coordinates are inconsistent with the vehicle center of mass coordinates, a model building failure reminder is sent; Through the model building failure reminder, the mass of the target component and the counterweight position of the target component on the initial grid finite element collision simulation model are adjusted.

[0011] According to a second aspect of the present application, a simulation model generation device is provided, the device comprising: The first acquisition module is used to obtain the collision simulation data of the vehicle body in white, left front door, left rear door, tires and target position glass, the vehicle mass, the coordinates of the vehicle center of mass and the mass of the target parts; A second acquisition module is configured to perform grid division on the body-in-white, the left front door, the left rear door, the tire, and the glass at a target position according to the collision simulation data to obtain target grid units; A first generating module is configured to generate an initial mesh finite element collision simulation model using the target mesh unit and the collision simulation data; A first balancing module is used to balance the mass of the target component to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model; A third acquisition module is used to obtain the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model; The comparison module is used to determine that the target grid finite element collision simulation model is successfully built if the simulation mass is equal to the vehicle mass and the simulation center of mass coordinates are consistent with the vehicle center of mass coordinates.

[0012] According to another aspect of the present application, an electronic device is provided, including: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the simulation model generation method as described above.

[0013] According to another aspect of the present application, a readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the simulation model generation method described above are implemented.

[0014] According to another aspect of the present application, a vehicle is provided, comprising: the above-mentioned simulation model generating device.

[0015] The simulation model generation method provided in the present application obtains the collision simulation data of the vehicle on the body-in-white, left front door, left rear door, tire and target position glass, the mass of the whole vehicle, the coordinates of the center of mass of the whole vehicle and the mass of the target parts, meshes the body-in-white, left front door, left rear door, tire and target position glass through the collision simulation data, obtains the target mesh unit, and generates an initial mesh finite element collision simulation model through the target mesh unit and the collision simulation data. At this time, the initial mesh finite element collision simulation model only needs to be built according to the body-in-white, left front door, left rear door, tire and target position glass, reducing the component subsystems (such as engine hood, front suspension, range extender, front bumper, cooling module, instrument panel tube beam, right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, target body interior parts, target body exterior parts and passenger compartment interior parts). The participation of the finite element collision simulation model (such as electrical appliances) simplifies the constructed model and reduces the number of grids that need to be generated in the model, which not only reduces the workload of modeling, but also reduces the demand for computing resources and improves the simulation efficiency. The mass of the target components is then weighted to the initial grid finite element collision simulation model to obtain the target grid finite element collision simulation model. By weighting the mass of some target components to the model, the state of the model is made close to the real vehicle, which ensures the authenticity and reliability of the model. The simulation mass and simulation center of mass coordinates of the target grid finite element collision simulation model are obtained. If the simulation mass is equal to the mass of the whole vehicle, and the simulation center of mass coordinates are consistent with the center of mass coordinates of the whole vehicle, it is determined that the target grid finite element collision simulation model is successfully built. By comparing the mass and center of mass coordinates, major errors in the later simulation can be avoided, the time cost of repeated calculations can be reduced, and at the same time, it can be further ensured that the built model can meet the test requirements of the working conditions.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings: Figure 1 This is a flowchart of the steps of a simulation model generation method provided by this application; Figure 2 yes Figure 1 The flowchart of step 102 in the simulation model generation method provided by the present application is shown; Figure 3 It is a structural schematic diagram of a simulation model generating device provided by this application; Figure 4 This is a structural diagram of an electronic device provided by this application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise that there is no contradiction.

[0019] The current whole vehicle collision safety simulation model needs to integrate multiple subsystems, such as the body-in-white, opening and closing parts, powertrain, battery pack, fuel tank, front and rear suspension, etc. Because there may be connections between different subsystems, there are many factors that need to be considered when generating the model, which makes the generated simulation model complex. In addition, because finite element meshes need to be generated according to each subsystem, too many participating subsystems will result in more finite element meshes being generated, resulting in low efficiency of simulation calculations and long optimization cycles. Based on the above problems, this application proposes a simulation model generation method. Figure 1 , shows a flowchart of the steps of a simulation model generation method provided by the present application, the method may include: Step 101, obtaining collision simulation data of the vehicle regarding the body-in-white, left front door, left rear door, tires and target position glass, the vehicle mass, the coordinates of the vehicle center of mass and the mass of the target parts.

[0020] The body-in-white (BIW) in this application refers to the vehicle's pre-painted structure, assembled from various metal sheets (such as steel and aluminum alloy) through welding, riveting, and other processes. The BIW does not include openings and closing elements such as doors, hoods, and trunk lids, nor does it include interior trim, electronic equipment, or powertrain components. BIW components include, but are not limited to, side frames such as the A-pillar, B-pillar, and C-pillar, door sills, the roof, the floor panels (including the front, center, and rear floors), the front engine compartment, the rear trunk, anti-collision beams, crossbeams, longitudinal beams, welds, and rivets.

[0021] To observe the deformation of the driver's side of the vehicle during a collision, this application selected the left front door and left rear door when building the model, focusing on the status of the left side of the vehicle. To build the mesh finite element collision simulation model, it is necessary to obtain collision simulation data for the body-in-white, left front door, left rear door, tires, and target glass. The collision simulation data includes computer-aided design model data (CAD model data), material data, and connection data. The CAD model data includes geometric data, the material data includes material type and property data, and the connection data includes the location and strength data of welds and bolted connections.

[0022] The target parts in this application include, but are not limited to, the hood, front suspension, range extender, front bumper, cooling module, instrument panel tube beam, right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, target body interior parts, target body exterior parts, and passenger compartment electrical appliances. Body exterior parts are components installed on the outside of the vehicle that combine functionality (protection, aerodynamics) with aesthetics. The hood and front bumper also fall under body exterior parts. However, in crash testing, observing the deformation state of these two parts is more important, so they are extracted separately for weight balancing. The remaining exterior parts, such as exterior handles, roof racks, exterior mirror housings, window moldings, and side skirts, are selected as target parts that are more important in crash testing and are referred to as target body exterior parts. Body interior parts are decorative and functional components inside the vehicle, such as door trim panels, seat trim, carpet, sun visors, and steering wheel trim. Similarly, the target parts that are more important in crash testing are selected as target body interior parts. Passenger compartment electrical appliances are electronic devices that provide comfort, infotainment, or safety features for passengers, such as the air conditioning control panel, interior lighting, steering wheel multi-function buttons, onboard cameras, central control screen, and audio system. Target interior and exterior body parts, as well as passenger compartment electrical appliances, may vary between vehicle models and configurations, and can be configured based on actual needs.

[0023] Step 102 : Meshing the body-in-white, left front door, left rear door, tires, and target position glass using the collision simulation data to obtain target mesh units.

[0024] The collision simulation data of this application includes computer-aided design model data (CAD model data), and the computer-aided design model data includes geometric data. This application can use the geometric data to determine the grid generation area corresponding to the body in white, left front door, left rear door, tire and target position glass when generating the model. According to the grid generation area and grid accuracy (set based on actual needs, the grid accuracy of different components can be different), the number of target grid units to be generated can be determined.

[0025] After obtaining the collision simulation data, the present application performs mesh division on the body-in-white, left front door, left rear door, tires and target position glass based on the data, wherein the target position glass includes the front windshield, sunroof and triangular window glass. Specifically, step 102 is as follows: Figure 2 As shown: Step 1021 , obtaining geometric data of the body-in-white, left front door, left rear door, tires, front windshield, sunroof glass, and triangular window glass from the collision simulation data.

[0026] Step 1022 , meshing the body-in-white, left front door, left rear door, tires, front windshield, sunroof glass, and triangular window glass is performed according to a preset strategy, and the mesh accuracy of the body-in-white, left front door, left rear door, and tires is determined.

[0027] Step 1023 , based on the geometric data and mesh accuracy, a limited number of target mesh cells of the body in white, the left front door, the left rear door, the tire, the front windshield, the sunroof glass, and the quarter window glass are obtained.

[0028] When meshing different components (body in white, left front door, left rear door, tires, front windshield, sunroof, and triangular window) according to a preset strategy, the mesh accuracy of different components may vary, and the mesh accuracy of different regions of the same component may also vary. This allows the component to be divided into critical and non-critical areas. A high-precision mesh (e.g., 2-5 mm) is then used for critical areas, such as the A-pillar and B-pillar of the body in white, the anti-collision beam of the door, and the tire tread. A lower-precision mesh (e.g., 5-10 mm) is used for non-critical areas, such as the flat areas of the body in white and the tire sidewalls. The specific number of target mesh cells can then be determined based on the mesh accuracy and geometric data.

[0029] For example, the BIW geometry data includes: the A-pillar: 500mm × 100mm × 2mm, and the side panel: 2000mm × 1000mm × 5mm. The mesh accuracy of the A-pillar is 2mm, and the mesh accuracy of the side panel is 5mm. Therefore, the target number of mesh cells for the A-pillar is 500 × 100 / (2 × 2) = 12,500, and the target number of mesh cells for the side panel is 2000 × 1000 / (5 × 5) = 80,000. The total target number of mesh cells for the BIW is 12,500 + 80,000 = 92,500.

[0030] Step 103: Generate an initial mesh finite element collision simulation model using the target mesh units and the collision simulation data.

[0031] This application determines the target number of grid cells and the distribution of grid cells corresponding to different components (body in white, left front door, left rear door, tire, front windshield, sunroof glass and triangular window glass) in the initial grid finite element collision simulation model through the geometric data of the collision simulation data, and generates the basic framework of the initial grid finite element collision simulation model based on the target number of grid cells and the distribution of grid cells corresponding to different components. It should be noted that the collision simulation data of this application can also obtain material data and connection data. Material data includes material type (such as steel, aluminum, rubber, etc.) and property data (such as elastic modulus, Poisson's ratio, density, yield strength, plastic strain curve, etc.), and connection data includes the location and strength data of welds and bolt connections.

[0032] Afterwards, the material data is integrated into the corresponding positions of the model to ensure that the correct mechanical response is given to the components during the simulation process (for example, if the white body is made of high-strength steel (material type), its property data (such as high yield strength) will cause the model to exhibit less plastic deformation in a collision, thereby protecting the passenger compartment. If it is incorrectly set to ordinary steel in the simulation, it may lead to an underestimation of the body's crash resistance). The connection data is integrated into the corresponding positions of the model to ensure that the interaction between components during the simulation is consistent with reality (for example, the left front door is connected to the white body by bolts, and its position and strength data determine whether the door will fall off during a collision. If the connection strength is set too low, the door may separate prematurely in the simulation, affecting the evaluation of the protection effect on the occupants in a side collision). By integrating the above data into the model, the accuracy of the simulation results is further guaranteed.

[0033] For ease of understanding, this application uses the body-in-white (BIW) as an example. Based on the BIW's geometric data, the target number and distribution of mesh elements are determined. Based on this target number and distribution, the basic framework of the model is generated. The material data and connection data for the BIW are then obtained. The material data includes elastic modulus of 210 GPa, Poisson's ratio of 0.3, density of 7850 kg / m³, and yield strength of 350 MPa. The plastic strain curve defines the hardening stage (e.g., the Ludwik model). The connection data includes the hinge bolts between the door and the BIW. The location data for this connection is the center coordinates of the hinge mounting holes. The strength data is: tensile strength of 10 kN, shear strength of 8 kN. The type uses beam elements to simulate the bolts, taking preload into account. The BIW-roof welds are also included. The location data for this connection is: one weld every 50 mm along the roof edge. The strength data is: shear strength of 5 kN. The failure criterion is: the weld breaks when the shear force exceeds a threshold. The material and connection data for the BIW is integrated into the basic framework of the simulation model. This allows the generated initial mesh finite element crash simulation model to reflect the actual physical behavior of the BIW while maintaining computational efficiency. Similarly, data integration for other components is performed in the same manner, and this application does not elaborate on this in detail.

[0034] This application generates an initial mesh finite element collision simulation model based on the target mesh units and collision simulation data. This initial mesh finite element collision simulation model is constructed based on the body-in-white, left front door, left rear door, tires, front windshield, sunroof, and quarter window glass, reducing the number of target components involved and, in turn, reducing mesh generation.

[0035] Step 104 : The mass of the target component is weighted to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model.

[0036] Because different target components are installed in different locations on the vehicle, this application determines different counterweight positions in the initial mesh finite element collision simulation model based on the different installation locations of the target components. The specific steps include: Obtain the installation position of the target component in the vehicle; The mass of the target component is determined by the installation position at the counterweight position of the initial mesh finite element collision simulation model.

[0037] When performing mass balancing in this application, the balancing position of the target components is mainly determined based on the installation position. Some target components (engine hood, front suspension, range extender, front bumper and cooling module) are relatively concentrated in the front cabin structure of the vehicle. Their mass distribution has an important influence on the mechanical behavior of the frontal collision. Therefore, these target components are equipped with balancing weights in the front cabin structure to accurately simulate the deformation and energy absorption of the front part during the collision. The instrument panel tube beam is the anti-collision structure of the passenger compartment (supporting airbags / steering column), providing a rigid mounting base for components such as the instrument panel, center console, air conditioning system, and airbags. Placing the counterweight on the front panel can enhance the energy absorption path during a frontal collision. The right front door and right rear door among the remaining target components are hingedly mounted on the side structure of the vehicle body. The battery pack is usually installed under the floor to lower the center of gravity of the vehicle and improve stability. The fuel tank is usually installed under the floor or at the rear, close to the rear suspension, and the rear suspension is directly connected to the rear of the floor. The rear wheels and rear motor are usually installed near the rear axle, close to the rear of the floor and the tailgate is hingedly mounted on the rear panel or the rear of the roof. Its mass distribution is mainly concentrated at the rear of the floor. The front seats are mounted on the front half of the vehicle floor, and the rear seats are mounted on the rear half of the vehicle floor. Electrical appliances in the passenger compartment are installed in different positions of the vehicle according to the usage requirements and scope of different appliances. It can be seen that the target parts of this part are relatively scattered in their installation positions, but they can all be mapped to a certain area on the body-in-white floor. Therefore, the mass of these target parts is weighted to the mapping position corresponding to the floor. Other target parts, such as target body interior parts and target body exterior parts, are usually decorated on the body-in-white, so their mass is weighted to the body-in-white. The above settings can more accurately reflect the actual installation position and mass distribution of these target parts, ensuring that the geometric and mechanical characteristics of the simulation model are consistent with the actual vehicle. The specific steps include: The weight position of the hood, front suspension, range extender, front bumper and cooling module is determined by the installation position at the front cabin structure of the body in white in the initial mesh finite element crash simulation model; The counterweight position of the instrument panel tube beam is determined by the installation position at the front panel of the body-in-white in the initial mesh finite element collision simulation model; The mass counterweight position of the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats and electrical appliances in the passenger compartment is determined at the floor of the body-in-white of the initial mesh finite element collision simulation model based on the installation position; The counterweight positions of the masses of the target vehicle body interior components and the target vehicle body exterior components are determined on the body-in-white of the initial mesh finite element collision simulation model by the installation positions.

[0038] When balancing the mass of the target interior and exterior parts on the body-in-white (BIW), the mass of all target interior and exterior parts is evenly distributed across the BIW. However, a special type of vehicle interior is the carpet, which directly covers the vehicle floor. Therefore, when determining the target vehicle interior for balancing, do not select the carpet. If balancing the carpet is necessary, then the carpet mass can be balanced on the floor of the BIW in the initial mesh finite element crash simulation model.

[0039] The floor is the main load-bearing structure of the vehicle body, connecting the front cabin, passenger compartment and rear cabin, and plays the role of energy absorption and force transmission in a collision. Configuring the mass counterweights of some of the target components mentioned above on the floor can more accurately simulate the impact of these target components on the vehicle body structure. When counterweighting the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats and electrical appliances in the passenger compartment, because they are in different installation positions, it is necessary to ensure that the geometry and mechanical properties of the simulation model are consistent with the actual vehicle after counterweighting. Therefore, when counterweighting, you can consider mapping the installation positions of these target components on the floor of the white body in the vertical direction. At this time, you can obtain the counterweight positions of these target components on the floor. The specific steps include: The counterweight position of the right front door mass is determined by the installation position at the right front floor of the body-in-white of the initial mesh finite element collision simulation model; The counterweight position of the right rear door mass is determined by the installation position at the right rear floor of the body-in-white of the initial mesh finite element collision simulation model; Determine the different mapping positions of the battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, and electrical appliances in the passenger compartment on the floor of the body-in-white of the initial mesh finite element crash simulation model based on the installation positions; The weight position of the floor of the body-in-white of the initial mesh finite element crash simulation model is determined by different mapping positions, including the mass of the battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, and electrical appliances in the passenger compartment.

[0040] Among them, the counterweights of target components such as the battery pack, fuel tank, and rear motor are configured on the floor, which can more accurately simulate the impact of these target components on the passenger compartment during a collision. The counterweights of the right front door and right rear door are configured on the floor, which can more accurately simulate the deformation and energy absorption of the door in a side collision. The counterweights of the tailgate and rear suspension are configured at the rear of the floor, which can more accurately simulate the mechanical behavior in a rear collision.

[0041] The above steps can more accurately simulate the center of mass position of the entire vehicle, improve the reliability of the simulation results, and by properly distributing the weight on the floor, the dynamic behavior of the vehicle during collision or driving can be more accurately simulated.

[0042] It should be noted that because the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, and electrical appliances in the passenger compartment are all three-dimensional, from a top-down perspective, the mapped location on the floor corresponds to a planar area, not a single point. Therefore, when performing mass distribution, the mass can be evenly distributed across the mapped location, or the center point of the mapped location can be determined and distributed at that location. If the planar image of the mapped location is an irregular shape, the center point can be determined by decomposing the irregular shape into several simple geometric shapes (such as rectangles, triangles, circles, etc.). The geometric center of each simple shape can then be calculated, and the geometric center of the entire shape can be weighted based on the area or volume of each simple shape. For complex irregular shapes, the geometric center can be calculated using integration methods. Alternatively, a digital model of the irregular shape can be imported into CAD software (such as AutoCAD, SolidWorks) or finite element analysis software (such as ANSYS, Abaqus), which will automatically calculate the geometric center of the shape. The specific calculation method is not specifically limited herein.

[0043] Step 105: Acquire the simulation quality and simulation center of mass coordinates of the target mesh finite element collision simulation model.

[0044] In this application, finite element simulation software (e.g., LS-DYNA, PAM-CRASH) is used to calculate the total mass (simulated mass) and center of mass coordinates (simulated center of mass coordinates) of the target mesh finite element crash simulation model. The center of mass coordinates are the weighted average position of the mass of all mesh elements in the model.

[0045] Step 106: If the simulation mass is equal to the vehicle mass and the simulation center of mass coordinates are consistent with the vehicle center of mass coordinates, it is determined that the target mesh finite element collision simulation model is successfully built.

[0046] This application determines whether the model is successfully built by comparing the simulated mass and the consistency of the simulated center of mass coordinates with the actual vehicle data. The verification conditions are that the simulated mass = the vehicle mass, and the simulated center of mass coordinates = the vehicle center of mass coordinates. Because data collection may have errors, the verification conditions can be allowed to have some allowable error ranges. That is, if the difference between the simulated mass and the vehicle mass is within a certain threshold, the simulated mass is considered to be equal to the vehicle mass, and if the distance between the simulated center of mass coordinates and the vehicle center of mass coordinates is within a certain threshold, the simulated center of mass coordinates are considered to be consistent with the vehicle center of mass coordinates.

[0047] For example, if the vehicle mass is 1500 kg and the vehicle center of mass coordinates are (1.2 m, 0.5 m, 0.6 m), the simulated mass is 1500 kg. The simulated center of mass coordinates are (1.2 m, 0.5 m, 0.6 m). Because the simulated mass is equal to the vehicle mass and the simulated center of mass coordinates are consistent with the vehicle center of mass coordinates, the model is successfully built.

[0048] This application is a target mesh finite element collision simulation model generated for the left front door and left rear door. Based on this setting, collision simulation testing and optimization based on the left working condition can be carried out.

[0049] If the simulated mass or center of mass coordinates are inconsistent with the vehicle data, a model building failure reminder will be sent. Based on the failure reminder, the mass and counterweight position of the target component will be adjusted, and the model will be rebuilt and verified. The specific steps include: If the simulation mass is not equal to the vehicle mass and / or the simulation center of mass coordinates are inconsistent with the vehicle center of mass coordinates, a model building failure reminder will be sent; Through the reminder of model building failure, adjust the mass of the target component and the counterweight position of the target component on the initial mesh finite element collision simulation model.

[0050] For example, if the vehicle mass is 1500 kg, the coordinates of the vehicle center of mass are (1.2 m, 0.5 m, 0.6 m). If the simulated mass is 1350 kg, the coordinates of the simulated center of mass are (1.3 m, 0.6 m, 0.7 m). The mass error threshold is set to 50 kg, and the center of mass coordinate distance error threshold is set to 0.2 m. Because 1500-1350=150>50, the distance between (1.2 m, 0.5 m, 0.6 m) and (1.3 m, 0.6 m, 0.7 m) is 0.1732 m<0.2 m. At this time, the conclusion is that the vehicle mass is not equal to the simulated mass, and the simulated center of mass coordinates are consistent with the vehicle center of mass coordinates. Because the verification conditions must be met simultaneously for the model to be considered successfully built, the masses here are not equal, so the model is determined to have failed at this time, and a model building failure reminder is sent. It is necessary to readjust the mass and counterweight position of the target component until the simulated mass and center of mass coordinates are consistent with the vehicle data or the error is within the allowable range.

[0051] The above steps can ensure the authenticity of the results of subsequent collision simulation tests, improve model reliability and development efficiency, enhance the quality of the whole vehicle collision simulation model, and provide a reliable foundation for vehicle safety design and optimization.

[0052] The simulation model generation method provided by the present application obtains the collision simulation data of the vehicle on the body-in-white, left front door, left rear door, tires and target position glass, the mass of the whole vehicle, the coordinates of the center of mass of the whole vehicle and the mass of the target parts, meshes the body-in-white, left front door, left rear door, tires and target position glass through the collision simulation data, obtains the target mesh unit, and generates an initial mesh finite element collision simulation model through the target mesh unit and the collision simulation data. By reducing the target parts involved in constructing the model, the constructed model is simplified and the number of meshes in the model is reduced, which not only reduces the workload of modeling, but also reduces the demand for computing resources and improves the simulation efficiency. Then, the target The mass of the parts is weighted on the initial mesh finite element collision simulation model to obtain the target mesh finite element collision simulation model. By weighting the mass of some target parts on the model, the state of the model is made close to the real vehicle, which ensures the authenticity and reliability of the model. The simulation mass and simulation center of mass coordinates of the target mesh finite element collision simulation model are obtained. If the simulation mass is equal to the mass of the whole vehicle, and the simulation center of mass coordinates are consistent with the center of mass coordinates of the whole vehicle, it is determined that the target mesh finite element collision simulation model is successfully built. By comparing the mass and center of mass coordinates, major errors in the later simulation can be avoided, the time cost of repeated calculations can be reduced, and at the same time, it can be further ensured that the built model can meet the test requirements of the working conditions.

[0053] Reference Figure 3 , shows a schematic structural diagram of a simulation model generation device provided by the present application, the device comprising: The first acquisition module 201 is used to obtain the collision simulation data of the vehicle regarding the body-in-white, left front door, left rear door, tires and target position glass, the vehicle mass, the coordinates of the vehicle center of mass and the mass of the target parts.

[0054] The second acquisition module 202 is used to perform grid division on the body-in-white, the left front door, the left rear door, the tires and the glass at the target position according to the collision simulation data to obtain target grid units.

[0055] The first generating module 203 is configured to generate an initial mesh finite element collision simulation model using target mesh elements and collision simulation data.

[0056] The first weight balancing module 204 is configured to balance the mass of the target component to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model.

[0057] The third acquisition module 205 is used to obtain the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model.

[0058] The comparison module 206 is used to determine that the target mesh finite element collision simulation model is successfully built if the simulation mass is equal to the vehicle mass and the simulation center of mass coordinates are consistent with the vehicle center of mass coordinates.

[0059] Optionally, the collision simulation data includes computer-aided design model data, the computer-aided design model data includes geometric data, and the target position glass includes a front windshield, a sunroof, and a triangular window.

[0060] The second acquisition module 202 specifically includes: The first acquisition submodule is used to acquire geometric data about the body in white, the left front door, the left rear door, the tire, the front windshield, the sunroof glass and the triangular window glass from the collision simulation data.

[0061] The division submodule is used to divide the body in white, left front door, left rear door, tires, front windshield, sunroof glass and triangular window glass into grids according to the preset strategy, and determine the grid accuracy of the body in white, left front door, left rear door and tires.

[0062] The second acquisition submodule is used to acquire a limited number of target grid cells of the body in white, left front door, left rear door, tire, front windshield, sunroof glass and triangular window glass according to geometric data and grid accuracy.

[0063] Optionally, target parts include but are not limited to engine hood, front suspension, range extender, front bumper, cooling module, instrument panel tube beam, right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, target body interior parts, target body exterior parts and electrical appliances in the passenger compartment.

[0064] Optionally, the simulation model generating device further includes: The fourth acquisition module is used to obtain the installation position of the target component in the vehicle.

[0065] The determination module is used to determine the mass of the target component at the counterweight position of the initial grid finite element collision simulation model through the installation position.

[0066] Optionally, the determination module specifically includes: The first determination submodule is used to determine the counterweight position of the mass of the engine hood, front suspension, range extender, front bumper and cooling module at the front cabin structure of the white body in the initial mesh finite element collision simulation model through the installation position.

[0067] The second determining submodule is used to determine the counterweight position of the mass of the instrument panel tube beam at the front panel of the white body in the initial mesh finite element collision simulation model according to the installation position.

[0068] The third determination submodule is used to determine the counterweight position of the mass of the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats and electrical appliances in the passenger compartment at the floor of the white body of the initial mesh finite element collision simulation model through the installation position.

[0069] The fourth determination submodule determines the counterweight position of the mass of the target vehicle body interior component and the target vehicle body exterior component on the white body of the initial mesh finite element collision simulation model through the installation position.

[0070] Optionally, the third determining submodule specifically includes: The first determining unit is configured to determine a counterweight position of the mass of the right front door at a right front floor of the body-in-white of the initial mesh finite element collision simulation model according to an installation position.

[0071] The second determining unit is configured to determine, by means of an installation position, a counterweight position of the mass of the right rear door at a right rear floor of the body-in-white of the initial mesh finite element collision simulation model.

[0072] The third determination unit is used to determine different mapping positions of the battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats and electrical appliances in the passenger compartment on the floor of the white body of the initial mesh finite element collision simulation model through installation positions.

[0073] The fourth determination unit is used to determine the counterweight position of the floor of the white body of the initial mesh finite element collision simulation model of the battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats and electrical appliances in the passenger compartment through different mapping positions.

[0074] Optionally, the simulation model generating device further includes: The sending module is used to send a model building failure reminder if the simulation mass is not equal to the vehicle mass and / or the simulation center of mass coordinates are inconsistent with the vehicle center of mass coordinates.

[0075] The adjustment module is used to adjust the mass of the target component and the counterweight position of the mass of the target component on the initial grid finite element collision simulation model through a model building failure reminder.

[0076] The simulation model generation method provided by the present application obtains the collision simulation data of the vehicle on the body-in-white, left front door, left rear door, tires and target position glass, the mass of the whole vehicle, the coordinates of the center of mass of the whole vehicle and the mass of the target parts, meshes the body-in-white, left front door, left rear door, tires and target position glass through the collision simulation data, obtains the target mesh unit, and generates an initial mesh finite element collision simulation model through the target mesh unit and the collision simulation data. By reducing the target parts involved in constructing the model, the constructed model is simplified and the number of meshes in the model is reduced, which not only reduces the workload of modeling, but also reduces the demand for computing resources and improves the simulation efficiency. Then, the target The mass of the parts is weighted on the initial mesh finite element collision simulation model to obtain the target mesh finite element collision simulation model. By weighting the mass of some target parts on the model, the state of the model is made close to the real vehicle, which ensures the authenticity and reliability of the model. The simulation mass and simulation center of mass coordinates of the target mesh finite element collision simulation model are obtained. If the simulation mass is equal to the mass of the whole vehicle, and the simulation center of mass coordinates are consistent with the center of mass coordinates of the whole vehicle, it is determined that the target mesh finite element collision simulation model is successfully built. By comparing the mass and center of mass coordinates, major errors in the later simulation can be avoided, the time cost of repeated calculations can be reduced, and at the same time, it can be further ensured that the built model can meet the test requirements of the working conditions.

[0077] Reference Figure 4 , the present application also provides an electronic device, such as Figure 4 As shown, it includes a processor 301, a communication interface 302, a memory 303 and a communication bus 304, wherein the processor 301, the communication interface 302, and the memory 303 communicate with each other through the communication bus 304. Processor 301, memory 303 for storing processor-executable instructions; The processor 301 is configured to execute the instructions to implement the simulation model generation method as described above: Obtain the vehicle's collision simulation data on the body-in-white, left front door, left rear door, tires, and target position glass, as well as the vehicle's mass, vehicle center of mass coordinates, and the mass of target components; Meshing the body-in-white, left front door, left rear door, tires, and target position glass using the collision simulation data to obtain target mesh units; Generate an initial mesh finite element collision simulation model using the target mesh unit and the collision simulation data; Balancing the mass of the target component to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model; Obtaining the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model; If the simulated mass is equal to the vehicle mass, and the simulated center of mass coordinates are consistent with the vehicle center of mass coordinates, it is determined that the target grid finite element collision simulation model is successfully built.

[0078] The communication bus mentioned in the terminal above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. This communication bus can be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is used in the figure, but this does not mean that there is only one bus or only one type of bus.

[0079] The communication interface is used for communication between the above terminal and other devices.

[0080] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage. Alternatively, the memory may be at least one storage device located away from the processor.

[0081] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.

[0082] In another embodiment provided in the present application, a computer-readable storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the simulation model generation method described in any of the above embodiments is implemented.

[0083] In another embodiment provided in the present application, a vehicle is also provided, which may specifically include: the above-mentioned simulation model generating device.

[0084] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described herein are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be magnetic media (e.g., floppy disk, hard disk, tape), optical media (e.g., DVD), or semiconductor media (e.g., solid-state drive (SSD)).

[0085] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0086] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0087] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the scope of protection of the present application.

Claims

1. A simulation model generation method, characterized in that: The method comprises: Obtain the vehicle's collision simulation data on the body-in-white, left front door, left rear door, tires, and target position glass, as well as the vehicle's mass, vehicle center of mass coordinates, and the mass of target components; Meshing the body-in-white, left front door, left rear door, tires, and target position glass using the collision simulation data to obtain target mesh units; Generate an initial mesh finite element collision simulation model using the target mesh unit and the collision simulation data; Balancing the mass of the target component to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model; Obtaining the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model; If the simulated mass is equal to the vehicle mass, and the simulated center of mass coordinates are consistent with the vehicle center of mass coordinates, it is determined that the target grid finite element collision simulation model is successfully built.

2. The method according to claim 1, characterized in that The collision simulation data includes computer-aided design model data, the computer-aided design model data includes geometric data, and the target position glass includes a front windshield glass, a sunroof glass, and a triangular window glass; Meshing the body in white, the left front door, the left rear door, the tire, and the target position glass using the collision simulation data to obtain target mesh units includes: Acquiring geometric data on the body-in-white, left front door, left rear door, tires, front windshield, sunroof glass, and triangular window glass from the collision simulation data; Meshing the body in white, the left front door, the left rear door, the tire, the front windshield, the sunroof glass, and the triangular window glass according to a preset strategy, and determining the mesh accuracy of the body in white, the left front door, the left rear door, the tire, the front windshield, the sunroof glass, and the triangular window glass; A limited number of target grid cells of the body-in-white, left front door, left rear door, tire, front windshield, sunroof glass and triangular window glass are obtained according to the geometric data and the grid accuracy.

3. The method according to claim 1, characterized in that The target parts include but are not limited to the engine hood, front suspension, range extender, front bumper, cooling module, instrument panel tube beam, right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, target body interior parts, target body exterior parts and electrical appliances in the passenger compartment.

4. The method according to claim 3, characterized in that Before balancing the mass of the target component to the initial mesh finite element collision simulation model to obtain the target mesh finite element collision simulation model, the method further includes: Obtaining the installation position of the target component on the vehicle; The mass of the target component is determined by the installation position at the counterweight position of the initial mesh finite element collision simulation model.

5. The method according to claim 4, characterized in that The determining the mass of the target component at the counterweight position of the initial mesh finite element collision simulation model by the installation position includes: Determining the counterweight position of the masses of the engine hood, front suspension, range extender, front bumper and cooling module at the front cabin structure of the body-in-white in the initial mesh finite element crash simulation model by the installation position; Determining the counterweight position of the mass of the instrument panel tube beam at the front panel of the body-in-white in the initial mesh finite element collision simulation model according to the installation position; Determining the counterweight position of the mass of the right front door, right rear door, battery pack, fuel tank, rear suspension, rear motor, tailgate, front / rear seats, and electrical appliances in the passenger compartment at the floor of the body-in-white of the initial mesh finite element collision simulation model based on the installation position; The counterweight positions of the masses of the target vehicle body interior components and the target vehicle body exterior components are determined on the body-in-white of the initial mesh finite element collision simulation model by the installation positions.

6. The method according to claim 5, characterized in that The method of determining the counterweight position of the mass of the right front door, the right rear door, the battery pack, the fuel tank, the rear suspension, the rear motor, the tailgate, the front / rear seats, and the electrical appliances in the passenger compartment at the floor of the body-in-white of the initial mesh finite element collision simulation model based on the installation position includes: Determining the counterweight position of the mass of the right front door at the right front floor of the body-in-white of the initial mesh finite element collision simulation model through the installation position; Determining the counterweight position of the mass of the right rear door at the right rear floor of the body-in-white of the initial mesh finite element collision simulation model through the installation position; Determining different mapping positions of the battery pack, the fuel tank, the rear suspension, the rear motor, the tailgate, the front / rear seats, and the electrical appliances in the passenger compartment on the floor of the body-in-white of the initial mesh finite element collision simulation model according to the installation positions; The counterweight position of the mass of the battery pack, the fuel tank, the rear suspension, the rear motor, the tailgate, the front / rear seats and the electrical appliances in the passenger compartment on the floor of the white body of the initial mesh finite element collision simulation model is determined by different mapping positions.

7. The method according to claim 1, characterized in that After obtaining the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model, the method includes: If the simulation mass is not equal to the vehicle mass and / or the simulation center of mass coordinates are inconsistent with the vehicle center of mass coordinates, a model building failure reminder is sent; Through the model building failure reminder, the mass of the target component and the counterweight position of the target component on the initial grid finite element collision simulation model are adjusted.

8. A simulation model generating device, characterized in that: The device comprises: The first acquisition module is used to obtain the collision simulation data of the vehicle body in white, left front door, left rear door, tires and target position glass, the vehicle mass, the coordinates of the vehicle center of mass and the mass of the target parts; A second acquisition module is configured to perform grid division on the body-in-white, the left front door, the left rear door, the tire, and the glass at a target position according to the collision simulation data to obtain target grid units; A first generating module is configured to generate an initial mesh finite element collision simulation model using the target mesh unit and the collision simulation data; A first balancing module is used to balance the mass of the target component to the initial mesh finite element collision simulation model to obtain a target mesh finite element collision simulation model; A third acquisition module is used to obtain the simulation quality and simulation center of mass coordinates of the target grid finite element collision simulation model; The comparison module is used to determine that the target grid finite element collision simulation model is successfully built if the simulation mass is equal to the vehicle mass and the simulation center of mass coordinates are consistent with the vehicle center of mass coordinates.

9. An electronic device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute the instructions to implement the simulation model generation method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: include: The simulation model generating device according to claim 8.

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