Simulation test method and device for vehicle-mounted display equipment support and electronic equipment

Abstract

The embodiment of the invention relates to the technical field of simulation analysis of vehicle structures, and discloses a simulation test method and device for a vehicle-mounted display equipment support and electronic equipment, and the method comprises the steps: determining a failure control parameter, and determining a failure basis and a failure criterion of a failure model; the failure control parameter comprises deletion when the deletion attribute is failure; determining constraints among the structure sub-models as contact constraints, incremental step control parameters and output control parameters; based on the failure control parameter, the failure basis, the failure criterion, the contact constraint, the incremental step control parameter and the output control parameter, applying a simulation process of a progressive breaking strength load to the to-be-processed model by adopting nonlinear statics simulation, and outputting target plastic mechanics data and a target failure state value of a unit at each time step; and the breaking strength of the vehicle-mounted display equipment bracket is determined. By applying the technical scheme of the invention, the accuracy of simulation analysis can be improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of simulation analysis of vehicle structures, and specifically to a simulation testing method, device, and electronic equipment for a vehicle-mounted display device bracket. Background Art

[0002] To ensure that the vehicle structure can be put into production, it is necessary to perform simulation analysis on the vehicle structure. Simulation analysis of vehicle structure involves many aspects of parameter setting. Currently, simulation analysis of vehicle structure focuses on improving simulation test efficiency, which has the problem of low accuracy. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention provide a simulation test method, apparatus, and electronic device for a vehicle-mounted display device bracket, which are used to solve the problem of low accuracy of simulation analysis in the prior art.

[0004] According to one aspect of an embodiment of the present invention, a simulation test method for a vehicle-mounted display device bracket is provided, the method comprising:

[0005] In response to a failure parameter setting instruction, determining failure control parameters of units included in the model to be processed, as well as determining a failure model, a failure basis of the failure model, and a failure criterion; the failure control parameters include a deletion attribute of "delete upon failure"; the model to be processed is obtained by meshing a simulation model of a vehicle-mounted display device bracket;

[0006] In response to the simulation parameter setting instruction, determining that the constraints between the structural sub-models included in the to-be-processed model are contact constraints, and determining the incremental step control parameters and output control parameters of the simulation process;

[0007] In response to a first test instruction, based on the failure control parameter, the failure basis, the failure criterion, the contact constraint, the incremental step control parameter, and the output control parameter, a nonlinear static simulation is used to simulate a process of applying a progressive fracture strength load to the model to be processed, and a first simulation result is output; the first simulation result includes target plasticity data and target failure state value of the unit at each time step;

[0008] The fracture strength of the vehicle-mounted display device bracket is determined based on the target plastic mechanics data and the target failure state value at each time step.

[0009] According to another aspect of an embodiment of the present invention, a simulation test device for a vehicle-mounted display device bracket is provided, comprising:

[0010] a first setting unit configured to determine, in response to a failure parameter setting instruction, failure control parameters of units included in the model to be processed, as well as a failure model, a failure basis of the failure model, and a failure criterion; the failure control parameters including a deletion attribute of "delete upon failure"; and the model to be processed being a simulation model of the vehicle-mounted display device bracket obtained by meshing;

[0011] A second setting unit is configured to, in response to a simulation parameter setting instruction, determine that the constraints between the structural sub-models included in the model to be processed are contact constraints, and determine an incremental step control parameter and an output control parameter of the simulation process;

[0012] a simulation unit, configured to, in response to a first test instruction, simulate a simulation process of applying a progressive fracture strength load to the model to be processed using nonlinear statics based on the failure control parameter, the failure basis, the failure criterion, the contact constraint, the incremental step control parameter, and the output control parameter, and output a first simulation result; the first simulation result including target plastic mechanics data and target failure state value of the unit at each time step;

[0013] A result determination unit is used to determine the fracture strength of the vehicle-mounted display device bracket based on the target plastic mechanics data and the target failure state value at each time step.

[0014] According to another aspect of an embodiment of the present invention, an electronic device is provided, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; the memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the above-mentioned simulation test method for the vehicle-mounted display device bracket.

[0015] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the storage medium stores at least one executable instruction, and the executable instruction enables an electronic device to execute the above-mentioned simulation test method for the vehicle-mounted display device bracket.

[0016] The simulation test method for the vehicle display device bracket provided in the embodiment of the present application determines that the failure control parameters include the deletion property of the unit as deletion upon failure, which can simulate the actual fracture situation of the vehicle display device bracket, improve accuracy, and also display the fracture process; determines that the constraints between the structural sub-models included in the model to be processed are contact constraints, so that the constraint settings conform to the actual constraints between the sub-structures included in the vehicle display device bracket, thereby improving the accuracy of the simulation test; determines the incremental step control parameters and the output control parameters, and realizes the output of the failure state value at each time step of the nonlinear simulation process to facilitate the determination of the fracture strength, thereby improving the test efficiency and accuracy; in addition, the simulation process of applying progressive fracture strength loads is simulated using nonlinear statics. Usually, the simulation process of nonlinear statics needs to gradually correct the solution through an iterative algorithm, and the iterative process may have non-convergence problems. For example, the deletion of the unit due to failure causes the stiffness matrix to mutate and cause singularity; through the failure control parameters, failure basis, failure criteria, contact constraints and incremental step control parameters, when the failed unit is deleted, the convergence of the simulation process using nonlinear statics is achieved.

[0017] The above description is only an overview of the technical solutions of the embodiments of the present invention. In order to more clearly understand the technical means of the embodiments of the present invention, they 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 embodiments of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the drawings. In the drawings:

[0019] Figure 1 A schematic flow chart showing a first embodiment of a simulation test method for a vehicle-mounted display device bracket provided by the present invention is shown;

[0020] Figure 2 A schematic structural diagram of a vehicle-mounted display device bracket provided by the present invention is shown;

[0021] Figure 3 A schematic diagram of a model to be processed provided by the present invention is shown;

[0022] Figure 4 A schematic diagram of applying a breaking strength load provided by the present invention is shown;

[0023] Figure 5 Schematic diagram showing the contact constraints between sub-models provided by the present invention Figure 1 ;

[0024] Figure 6Schematic diagram showing the contact constraints between sub-models provided by the present invention Figure 2 ;

[0025] Figure 7 Schematic diagram showing the contact constraints between sub-models provided by the present invention Figure 3 ;

[0026] Figure 8 Schematic diagram showing the contact constraints between sub-models provided by the present invention Figure 4 ;

[0027] Figure 9 A schematic diagram of a crossbeam sub-model in a top cover provided by the present invention is shown;

[0028] Figure 10 A schematic diagram of applying a pull-out force provided by the present invention is shown;

[0029] Figure 11 A schematic structural diagram of a simulation test device for a vehicle-mounted display device bracket provided by the present invention is shown;

[0030] Figure 12 A schematic structural diagram of an embodiment of an electronic device provided by the present invention is shown. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0032] Figure 1 The flowchart of the first embodiment of the simulation test method of the vehicle display device bracket of the present invention is shown, and the method is executed by an electronic device. Figure 1 As shown, the method includes the following steps:

[0033] Step 110: In response to the failure parameter setting instruction, determine the failure control parameters of the units included in the model to be processed, as well as determine the failure model, the failure basis and failure criteria of the failure model; the failure control parameters include: the deletion attribute is deleted when failure; the model to be processed is obtained by meshing the simulation model of the vehicle display device bracket.

[0034] Among them, the vehicle-mounted display device bracket can be a vehicle-mounted display device bracket located in the rear row of the vehicle, and the vehicle-mounted display device bracket is used to fix the display device so that the rear passengers can browse and edit multimedia content through the display device.

[0035] It should be noted that the vehicle-mounted display device bracket in this embodiment is used to mount the display device. When the vehicle bumps and generates high-frequency vibrations, or the weight of the display device exceeds the load of the vehicle-mounted display device bracket, the vehicle-mounted display device bracket may break. This embodiment determines the breaking strength of the vehicle-mounted display device bracket through simulation tests.

[0036] Among them, the simulation model of the vehicle display device bracket is obtained by three-dimensional modeling of the vehicle display device bracket; the simulation model is meshed to obtain a model to be processed, and the model to be processed includes units corresponding to the mesh, and the vertices of the units are nodes.

[0037] Among them, the failure model is a mathematical model used to predict the failure of a material under the action of a fracture strength load; the failure model can be a plastic failure model, which is used to describe the process of fracture of a material due to plastic deformation; the failure basis includes physical quantities that define material failure, and the failure criterion is the condition for judging the occurrence of failure; illustratively, the failure basis includes fracture strain, and the failure criterion is an energy criterion.

[0038] Failure control parameters include a deletion attribute, which is a numerical processing method used to simulate the physical behavior of materials after failure. The deletion attribute is set to delete on failure, which means that when the material fails, the unit will be deleted and no longer participate in subsequent calculations. In this embodiment, the deletion attribute is set to delete on failure to simulate the actual fracture situation of the vehicle display device bracket, thereby improving accuracy.

[0039] Specifically, the material of the vehicle display device bracket is PC / ABS, which is a thermoplastic alloy that combines the strength of polycarbonate (PC) and the toughness of ABS, and its plastic deformation ability is between metal and brittle plastic.

[0040] The electronic device receives a failure parameter setting instruction initiated by the user, and sets the failure control parameters of the unit, the failure basis and failure criteria of the material failure model according to the setting instruction; for example, in Computer Aided Engineering (CAE), select Yes for Element deletion; in the Ductile Damage Model option of CAE, select Ductile Damage, set the failure basis of the plastic failure model, and select the failure criterion in the failure equation of the plastic failure model.

[0041] Alternatively, as Figure 2As shown, the vehicle-mounted display device bracket includes: a top cover middle crossbeam 21, a bracket base 22, a bracket lower cover plate 23, a bracket upper cover plate 24 and a bracket ball head 25; the simulation model includes: a top cover middle crossbeam sub-model, a bracket base sub-model, a bracket lower cover plate sub-model, a bracket upper cover plate sub-model and a bracket ball head sub-model; before step 110, it also includes: meshing the top cover middle crossbeam sub-model, the bracket base sub-model, the bracket lower cover plate sub-model, the bracket upper cover plate sub-model and the bracket ball head sub-model to obtain a model to be processed, and the model to be processed is as shown in FIG. Figure 3 shown.

[0042] Specifically, the crossbeam submodel of the top cover is divided into shell units, and the unit type is triangular unit or quadrilateral unit to obtain the crossbeam submodel of the top cover to be processed; the bracket base submodel, the bracket lower cover submodel, the bracket upper cover submodel and the bracket ball head submodel are divided into tetrahedron units respectively to obtain the bracket base submodel to be processed, the bracket lower cover submodel to be processed, the bracket upper cover submodel to be processed and the bracket ball head submodel to be processed; the models to be processed include: the crossbeam submodel of the top cover to be processed, the bracket base submodel to be processed, the bracket lower cover submodel to be processed, the bracket upper cover submodel to be processed and the bracket ball head submodel to be processed.

[0043] In order to improve convergence, the bracket base sub-model, bracket lower cover sub-model, bracket upper cover sub-model and bracket ball head sub-model are divided into tetrahedral elements respectively, and then a layer of shell elements is generated outside the tetrahedral elements. The properties of the shell elements are shell section properties (SHELL SECTION) with a thickness of 0.1mm. The properties of the tetrahedral elements are solid section properties (SOLID SECTION); shell elements can effectively suppress the non-physical deformation of the solid element surface, and can also provide a smoother contact surface to improve contact stability; shell elements can transfer concentrated stress to the solid element more evenly, avoiding stress singularity at the sharp corners of the tetrahedron, thereby improving convergence.

[0044] Step 120: In response to the simulation parameter setting instruction, determine that the constraints between the structural sub-models included in the model to be processed are contact constraints, and determine the incremental step control parameters and output control parameters of the simulation process.

[0045] Among them, the constraints between substructures in CAE can be fixed constraints or contact constraints. When the substructures are rigidly connected, fixed constraints are usually selected. When there is a relative position change between the substructures, contact constraints are usually selected.

[0046] In this embodiment, there are relative position changes between the structural sub-models corresponding to the vehicle-mounted display device bracket, and the constraints between the structural sub-models are determined to be contact constraints; since there are relative position changes between the sub-structures included in the vehicle-mounted display device bracket, the constraints between the structural sub-models are set as contact constraints, so that the constraint settings are consistent with the actual constraints between the sub-structures included in the vehicle-mounted display device bracket, thereby improving the accuracy of the simulation test.

[0047] Among them, the incremental step control parameters of the simulation process are used to determine each time step in the simulation process, and the output control parameters are used to determine the simulation data output at each time step in the simulation process.

[0048] Optionally, the models to be processed include: a top cover middle beam sub-model, a bracket base sub-model, a bracket lower cover sub-model, a bracket upper cover sub-model and a bracket ball head sub-model; the constraints between the top cover middle beam sub-model and the bracket base sub-model are set to surface-to-surface contact constraints, the constraints between the bracket base sub-model and the bracket lower cover sub-model are set to surface-to-surface contact constraints, the constraints between the bracket base sub-model and the bracket upper cover sub-model are set to surface-to-surface constraints, and the constraints between the bracket upper cover sub-model and the bracket ball head sub-model are set to surface-to-surface constraints.

[0049] The incremental step control parameters include: initial incremental step and maximum incremental step; the initial incremental step allows for rapid loading at the beginning of use. When there is a problem of non-convergence when determining the fracture strength load of the next time step according to the initial incremental step, the next time step is determined according to the maximum incremental step, thereby realizing a nonlinear simulation process.

[0050] The output control parameters include but are not limited to: a failure status value, which can reflect whether the unit has failed, and the time when the fracture occurs can be determined by the failure status value.

[0051] By setting the constraints, incremental step control parameters of the simulation process, and output control parameters as described above, the subsequent simulation process makes the constraint settings conform to the actual constraints between the substructures included in the vehicle display device bracket, thereby improving the accuracy of the simulation test. In addition, the failure state value can be output at each time step of the nonlinear simulation process to facilitate the determination of the fracture strength.

[0052] Step 130: In response to the first test instruction, based on the failure control parameters, failure basis, failure criteria, contact constraints, incremental step control parameters and output control parameters, a nonlinear static simulation is used to apply a simulation process of a progressive fracture strength load to the model to be processed, and a first simulation result is output; the first simulation result includes the target plastic mechanics data and target failure state value of the unit at each time step.

[0053] Among them, the first test instruction is used to test the breaking strength of the vehicle-mounted display device bracket.

[0054] Progressive fracture strength load means that the fracture strength load applied in each time step is different, and the fracture strength load applied in the latter time step is greater than the fracture strength load applied in the previous time step, that is, during the simulation process, the application of the fracture strength load is gradually increased; nonlinear statics means that the fracture strength load increments applied in each time step may be different, that is, the progressive increase of the fracture strength load is not linear, which is caused by the setting of the incremental step control parameters.

[0055] Specifically, when the failure control parameters, failure basis, failure criteria, contact constraints, incremental step control parameters and output control parameters are set, the process of applying progressive fracture strength load to the model to be processed can be simulated through nonlinear statics, and the plastic mechanics data and failure state value of the unit can be output at each time step.

[0056] It should be noted that through the failure control parameters, failure basis, failure criteria, contact constraints and incremental step control parameters, the process of simulation through nonlinear statics can ensure convergence when the failed units are deleted. By setting the incremental step control parameters and output control parameters, the plastic mechanics data and failure state value of the unit can be output at each time step of the simulation process.

[0057] Optionally, after step 130 , the method further includes: determining a loading load in response to the loading instruction.

[0058] Specifically, the loading load includes: loading the fracture strength load, specifically, establishing a node at the center of mass of the model to be processed, taking the node as the main point, and connecting the main point with the surface node of the ball head sub-model through the beam unit (beam unit), such as Figure 4 As shown, a vertical fracture strength load is applied to this node.

[0059] Step 140: Determine the fracture strength of the vehicle-mounted display device bracket based on the target plastic mechanics data and the target failure state value at each time step.

[0060] Among them, the target plastic mechanics data includes target stress and target yield strain; fracture strength refers to the fracture strength load that the material withstands when failure (fracture) occurs.

[0061] Specifically, when the target failure state value changes from 0 to 1, it is determined that the material begins to fail, and the time step at which the target failure state value changes from 0 to 1 is obtained. The target plastic mechanics data is used to verify whether failure occurs in this time step. If the verification is passed, the fracture strength load corresponding to the time step is used as the fracture strength.

[0062] Optionally, step 140 includes: taking the time step corresponding to the first target failure state value indicating failure as the first target time step; when the target plastic mechanics data corresponding to the first target time step meets the failure condition, determining the fracture strength of the vehicle-mounted display device bracket according to the first target time step and a preset fracture strength load threshold.

[0063] The preset fracture strength load threshold is the fracture strength load applied in the last time step of the simulation process; the preset fracture strength load threshold is usually 3 to 5 times the weight of the display device.

[0064] Specifically, in the target failure state value of each time step, the first target failure state value indicating failure is determined, and the time step corresponding to the target failure state value is used as the first target time step T1. The target stress S1 and target yield strain PEEQ1 corresponding to the first target time step T1 are obtained in the target plastic mechanics data of each time step; if the target stress S1 is greater than or equal to the preset failure stress, and the target yield strain PEEQ1 is greater than or equal to the maximum true strain value of PC / ABS, the product between the first target time step and the preset fracture strength load threshold is calculated to obtain the fracture strength of the vehicle-mounted display device bracket; the accurate fracture strength can be quickly obtained through the target failure state value, target stress and target yield strain, thereby improving the test efficiency and accuracy.

[0065] The simulation test method for the vehicle display device bracket provided in the embodiment of the present application determines that the failure control parameters include the deletion property of the unit as deletion upon failure, which can simulate the actual fracture situation of the vehicle display device bracket, improve accuracy, and also display the fracture process; determines that the constraints between the structural sub-models included in the model to be processed are contact constraints, so that the constraint settings conform to the actual constraints between the sub-structures included in the vehicle display device bracket, thereby improving the accuracy of the simulation test; determines the incremental step control parameters and the output control parameters, and realizes the output of the failure state value at each time step of the nonlinear simulation process to facilitate the determination of the fracture strength, thereby improving the test efficiency and accuracy; in addition, the simulation process of applying progressive fracture strength loads is simulated using nonlinear statics. Usually, the simulation process of nonlinear statics needs to gradually correct the solution through an iterative algorithm, and the iterative process may have non-convergence problems. For example, the deletion of the unit due to failure causes the stiffness matrix to mutate and cause singularity; through the failure control parameters, failure basis, failure criteria, contact constraints and incremental step control parameters, when the failed unit is deleted, the convergence of the simulation process using nonlinear statics is achieved.

[0066] Optionally, the failure control parameters of the units included in the model to be processed are determined, including: determining that the deletion attribute of the unit is deletion upon failure, the maximum stiffness degradation coefficient of the unit is a first preset value, and the viscosity coefficient of the unit is a second preset value; the first preset value is the difference between 1 and a small positive number, and the second preset value is one tenth of the small positive number; the small positive number is a positive number between 0.001 and 0.01.

[0067] Specifically, the failure control parameters of the unit include: the deletion attribute of the unit, the maximum stiffness degradation coefficient of the unit, and the viscosity coefficient of the unit; in this embodiment, the maximum stiffness degradation coefficient and the viscosity coefficient are both custom settings (Specify), and the maximum stiffness degradation coefficient is set to the first preset value, and the viscosity coefficient is set to the second preset value.

[0068] A tiny positive number is a positive number between 0.001 and 0.01, that is, the value range of the tiny positive number is [0.001, 0.01]; the first preset value is the difference between 1 and the tiny positive number, and the second preset value is one tenth of the tiny positive number; exemplarily, when the tiny positive number is 0.01, the first preset value is 0.99, and the second preset value is 0.0001; when the tiny positive number is 0.001, the first preset value is 0.999, and the second preset value is 0.00001; when the tiny positive number is 0.005, the first preset value is 0.995, and the second preset value is 0.0005.

[0069] Exemplarily, setting the failure control parameters of the unit includes: setting Element deletion to Yes, selecting Custom (Custom) for the maximum stiffness degradation coefficient (Max Degradation), and setting the maximum stiffness degradation coefficient to 0.99, selecting Specify for the viscosity coefficient (Viscossity), and setting the viscosity coefficient to 0.001.

[0070] Taking the maximum stiffness degradation coefficient of 0.99 and the viscosity coefficient of 0.001 as an example, the maximum stiffness degradation coefficient of 0.99 means that 1% of the original stiffness is retained after the unit fails. Before the unit is deleted, the stiffness gradually degrades (such as from 100% to 1%), which can simulate the expansion of microcracks inside the material. Compared with pure unit deletion, pure unit deletion may cause a sudden redistribution of the stress field. By deleting units with stiffness degradation, the transfer of fracture strength load can be made smoother; artificial damping is introduced by the viscosity coefficient to suppress high-frequency oscillations and maintain calculation stability at the moment of unit deletion; the embodiment of the present application avoids calculation divergence caused by mesh distortion by setting a lower viscosity coefficient (such as 0.001); in summary, by setting a larger maximum stiffness degradation coefficient, the gradual process of the material from damage to fracture can be simulated, avoiding sudden changes in fracture strength load due to unit deletion, and a smaller viscosity coefficient can provide necessary damping at the moment of unit deletion to ensure that the calculation does not diverge. In other words, by setting a larger maximum stiffness degradation coefficient and a smaller viscosity coefficient, convergence is improved.

[0071] Optionally, determining the failure model, the failure basis of the failure model and the failure criterion includes: determining that the failure model is a plastic failure model; determining that the failure basis of the plastic failure model is fracture strain; the strain value corresponding to the fracture strain is the maximum true strain value of the material used for the vehicle-mounted display device bracket; determining that the failure criterion of the plastic failure model is an energy criterion, and the fracture energy of the energy criterion is a third preset value; the third preset value is the square of a small positive number, and the small positive number is a positive number between 0.001 and 0.01.

[0072] Among them, the plastic failure model is used to describe the process in which a material gradually fractures due to plastic deformation. The failure basis of the plastic failure model is the fracture strain, which refers to determining whether the material will crack based on the strain value. The strain value corresponding to the fracture strain is the maximum strain value that the material can withstand before fracture.

[0073] The failure criterion of the plastic failure model is the energy criterion, which means judging whether a material has failed by using energy-related physical quantities. The fracture energy is the energy absorbed per unit area of ​​the material during the failure process.

[0074] For example, the ductile damage model is selected in the failure model, the judgment basis of the ductile damage model is set as the fracture strain, and the maximum true strain value of PC / ABS is used as the strain value corresponding to the fracture strain; the strain value corresponding to the fracture strain is set to the maximum true strain value of PC / ABS, so that the triggering conditions of the simulated fracture are consistent with the actual ones, thereby improving the accuracy.

[0075] In the failure equation (Damage Evolution) of the plastic failure model, select the failure criterion as the energy criterion (Energy), and fill in the third preset value in the fracture energy (Fracture Energy).

[0076] When the tiny positive number is 0.01, the third preset value (fracture energy) is 0.0001. When the tiny positive number is 0.001, the fracture energy is 0.000001, that is, the fracture energy is a smaller value. In a specific example, the fracture energy can be 0.00001. Setting the fracture energy to a smaller value indicates that the damage evolves faster, and the brittle fracture process can be simulated. The stress quickly returns to zero after failure, reducing the convergence difficulty caused by iteration in the damage evolution stage and improving the convergence speed.

[0077] In the above embodiment, by setting the failure model to a plastic failure model, setting the failure basis to the fracture strain, setting the maximum true strain value, setting the energy criterion, and setting the fracture energy to a smaller value, the triggering conditions of the simulated fracture are consistent with the actual conditions, avoiding convergence difficulties caused by the fracture strain setting deviating from the actual value, improving the accuracy of the simulation test, and making the stress return to zero quickly after failure, reducing the convergence difficulties caused by iterations in the damage evolution stage, and improving the convergence speed.

[0078] Optionally, the model to be processed includes: a top cover middle beam sub-model, a bracket base sub-model, a bracket lower cover sub-model, a bracket upper cover sub-model and a bracket ball head sub-model; determining that the constraints between the structural sub-models included in the model to be processed are contact constraints, including: responding to the constraint setting instruction, determining that the constraints between the top cover middle beam sub-model and the bracket base sub-model include point-to-surface contact constraints and surface-to-surface contact constraints; determining that the constraints between the bracket base sub-model and the bracket lower cover sub-model are surface-to-surface contact constraints; determining that the constraints between the bracket base sub-model and the bracket upper cover sub-model are surface-to-surface constraints; determining that the constraints between the bracket upper cover sub-model and the bracket ball head sub-model are surface-to-surface constraints.

[0079] Specifically, if Figure 5 As shown, the crossbeam sub-model in the top cover includes a limiting hole, the bracket base sub-model includes a limiting column, the contact point 51 between the limiting hole and the limiting column is a point-to-surface contact, and the bracket base sub-model also includes a crossbeam contact surface, which determines that the contact point 52 between the limiting hole and the crossbeam contact surface is constrained to be a surface-to-surface contact.

[0080] like Figure 6 As shown, the bracket lower cover sub-model includes a limiting column, and the contact 61 between the limiting column of the bracket lower cover sub-model and the bracket base sub-model is surface-to-surface contact. The bracket lower cover sub-model includes a pin, and the contact 62 between the pin of the bracket lower cover sub-model and the bracket base sub-model is surface-to-surface contact; the edge overlap surface 63 between the bracket lower cover sub-model and the bracket base is surface-to-surface contact.

[0081] like Figure 7 As shown, the bracket upper cover sub-model includes a limit block, and the contact 71 between the limit block of the bracket upper cover sub-model and the bracket base sub-model is surface-to-surface contact. The bracket lower cover sub-model includes a supporting structure, and the contact 72 between the supporting structure of the bracket lower cover sub-model and the bracket upper cover is surface-to-surface contact; the contact 73 between the bracket upper cover sub-model and the circumferential contact surface of the bracket upper cover sub-model is surface-to-surface contact.

[0082] like Figure 8 As shown, the bracket ball head sub-model includes a mounting hole support structure, and the contact point 81 between the mounting hole support structure of the bracket ball head sub-model and the bracket upper cover plate sub-model is surface-to-surface contact, and the contact point 82 between the bracket ball head sub-model and the circumferential contact surface of the bracket upper cover plate sub-model is surface-to-surface contact.

[0083] Optionally, the surface-to-surface contact constraint corresponds to a master surface and a slave surface; the master surface normal is from the master surface to the slave surface, and the slave surface normal is from the slave surface to the master surface; the contact spacing attribute corresponding to the surface-to-surface contact is an automatic adjustment attribute.

[0084] Specifically, when creating a contact pair, select the contact pair (CONTACT_PAIR) type, specify the master surface and slave surface, select the friction property for the contact property (SURFACEINTERACTION), and define static friction and dynamic friction. Associate the contact property (SURFACE INTERACTION) to the contact pair, and the contact type is surface-to-surface contact (SURFACE TO SURFACE); of the two surfaces in surface-to-surface contact, the surface with higher rigidity is the master surface.

[0085] Among them, most of the settings of point-to-surface contact constraints are similar to those of surface-to-surface contact, except that its contact type is point-to-surface contact (NODE TO SURFACE).

[0086] The element type of the master surface and the slave surface is surface element (SURFACE_ELEMENT). The normal rules include: master surface normal: from the master surface to the slave surface; slave surface normal: from the slave surface to the master surface; to ensure that the normal directions of the two surfaces are facing each other, so that the software can correctly detect contact and avoid penetration or false separation.

[0087] The contact spacing property corresponding to surface-to-surface contact is an automatic adjustment property, which enables the failure model to automatically detect and adjust the initial gap or penetration between contact surfaces, avoiding contact failure or penetration caused by manual modeling errors and improving convergence.

[0088] Optionally, in response to the simulation parameter setting instruction, a Beam unit is established at the bolt connection in the model to be processed, and six degrees of freedom are constrained; wherein the model to be processed includes 7 bolt connections.

[0089] In the above embodiment, contact constraints are used between the sub-models that move with each other in the model to be processed, rather than fixed constraints. Since the displacement changes between components in the fracture analysis are large, if fixed constraints are used, the simulation test results will be distorted. Therefore, contact constraints are used to meet the actual constraints between the sub-structures included in the vehicle display device bracket, thereby improving the accuracy of the simulation test.

[0090] Optionally, the incremental step control parameters include: an initial incremental step and a maximum incremental step, and the initial incremental step is twice the maximum incremental step; the output control parameters include: plastic mechanics data and failure state value of the unit.

[0091] Among them, the initial incremental step is used to set the incremental step size of the fracture strength load for the first attempt, and the maximum incremental step is used to limit the maximum fracture strength load increment in a single step to ensure the stability of nonlinear convergence; the plastic mechanics data of the unit include: the stress and yield strain of the unit, and the failure state value is used to indicate whether the unit has failed.

[0092] Optionally, in response to a simulation parameter setting instruction, the nonlinear properties, analysis type and calculation end time are determined; wherein the calculation end time is defined by a pseudo-time range for applying the fracture strength load, with the time ranging from 0 to 1, corresponding to a range in which the fracture strength load is loaded from 0% to 100%.

[0093] Specifically, the nonlinear attribute is yes, that is, the simulation process is nonlinear; the analysis type is statics (quasi-static loading), and the calculation end time is 1.

[0094] For example, the nonlinear attribute (NLGEOM) is determined to be YES, the initial incremental step (Init_Inc) is 0.1, the calculation end time (T_period) is 1, and the maximum incremental step (MaxIncr) is 0.05; that is, according to the initial incremental step, the calculation is first performed with a step size of 10% of the fracture strength load. If the nonlinear convergence is difficult, the step size is reduced to 5% of the fracture strength load according to the maximum incremental step. In this way, it can be ensured that during the simulation process, at least one time step corresponds to every 10% of the fracture strength load.

[0095] In the above embodiment, by setting the initial incremental step to twice the maximum incremental step, the calculation accuracy is improved, and a more accurate fracture strength can be found; by setting the output control parameters, the fracture strength can be quickly determined based on the plastic mechanics data and failure state values, thereby improving the test efficiency.

[0096] Optionally, step 130 further includes: determining a boundary constraint in response to the load instruction.

[0097] Specifically, determining the boundary constraints includes: establishing a beam unit (beam unit) at the bolt fixing hole in the cross beam sub-model of the top cover and constraining six degrees of freedom; constraining six degrees of freedom at the welding point in the cross beam sub-model of the top cover; for example, Figure 9 As shown, the crossbeam sub-model in the top cover includes a plurality of bolt fixing holes 91 (a total of 6 bolt holes, 3 on the left and 3 on the right), and a plurality of welding points 92.

[0098] Optionally, the first simulation result also includes the first node displacement of each time step; the method also includes: determining a second target time step based on a preset display device gravity and a preset fracture strength load threshold; and using the first node displacement corresponding to the second target time step as the display device drop displacement.

[0099] This embodiment is used to determine the downward displacement of the display device after the display device is mounted on the vehicle-mounted display device bracket.

[0100] The first node displacement is the node displacement output during the simulation process of applying progressive fracture strength load to the model to be processed using nonlinear static simulation.

[0101] Specifically, the first node displacement is output at each time step of the simulation process; the ratio between the preset display device gravity and the preset fracture strength load threshold is calculated to obtain the second target time step, which is the time step when the applied fracture strength load is equal to the preset display device gravity, and the first node displacement corresponding to the second target time step is used as the downward displacement of the display device.

[0102] Exemplarily, Hyperview (a post-processing module in CAE) is opened in CAE to display the first node displacement output at each time step, the second target time step T2 = F2 / F1, where F2 is the preset display device gravity, and F1 is the preset fracture strength load threshold. When the first simulation result is switched to the time step of T2, the vertical downward displacement of the display device after the display device is mounted is displayed.

[0103] Accordingly, since the first simulation result includes the first node displacement, the output control parameter also includes the node displacement.

[0104] In the above embodiment, the first node displacement output at each time step is used to determine the downward displacement of the display device after the display device is mounted on the vehicle-mounted display device bracket. This can then be used to determine whether the vehicle-mounted display device bracket will give the user a feeling of the display device falling down, so as to facilitate subsequent improvements to the vehicle-mounted display device bracket and enhance the user experience.

[0105] In an optional embodiment, the simulation test method of the vehicle-mounted display device bracket also includes: in response to a second test instruction, based on failure control parameters, failure basis, failure criteria and contact constraints, using nonlinear statics simulation to apply a simulation process of progressive pull-out force to the model to be processed, and outputting a second simulation result; the second simulation result includes the second node displacement of each time step; based on the second node displacement of each time step, determining a third target time step of displacement mutation; according to the third target time step and a preset pull-out force threshold, determining the critical pull-out force of the vehicle-mounted display device bracket.

[0106] Among them, the second test instruction is used to test the critical pull-out force of the vehicle-mounted display device bracket.

[0107] Progressive pull-out force means that the pull-out force applied at each time step is different, and the pull-out force applied in the subsequent time step is greater than the pull-out force applied in the previous time step. That is, during the simulation process, the pull-out force is applied in a progressive manner. Nonlinear statics means that the pull-out force increments applied at each time step may be different, that is, the progressive increase in pull-out force is not linear. This is caused by the setting of the incremental step control parameters.

[0108] The second node displacement is the node displacement output during the simulation process of applying a progressive pull-out force to the model under processing using nonlinear static simulation. The preset pull-out force threshold is the pull-out force applied during the last time step of the simulation process.

[0109] Specifically, when failure control parameters, failure basis, failure criteria, contact constraints, incremental step control parameters and output control parameters are set, the process of applying progressive pull-out force to the model to be processed can be simulated through nonlinear statics, and the second node displacement can be output at each time step.

[0110] Optionally, after step 130 , the method further includes: determining a loading load in response to the loading instruction.

[0111] Specifically, the loading load includes: loading the pull-out force, specifically, establishing a node at the hole center of the ball head sub-model, and connecting the node with the surface node of the ball head sub-model through the Beam unit, such as Figure 10 As shown, the pull-out force is loaded at this node along the hole axis.

[0112] Accordingly, since the second simulation result includes the second node displacement, the output control parameter also includes the node displacement.

[0113] After obtaining the second node displacement output at each time step, a third target time step with a sudden displacement change is determined among the multiple second node displacements. For example, if the second node displacements output at the previous time step are all 0, the second node displacement output at the third target time step is a positive number. The product of the third target time step and the preset pull-out force threshold is calculated to obtain the critical pull-out force of the vehicle-mounted display device bracket.

[0114] Exemplarily, Hyperview is opened in CAE to display the second node displacement output at each time step, and the third target time step T3 at which the second node displacement suddenly changes is determined, and the critical pull-out force F4 = F3*T3; where F3 is the preset pull-out force threshold.

[0115] In the above embodiment, the second node displacement output at each time step can be used to quickly determine the force required to pull out the display device from the vehicle-mounted display device bracket, that is, the critical pull-out force, thereby improving the efficiency of the simulation test. The critical pull-out force can determine whether the user can easily pull out the display device from the vehicle-mounted display device bracket, which can be used for subsequent improvements to the vehicle-mounted display device bracket to enhance the user experience.

[0116] The simulation test method for the vehicle display device bracket provided in the embodiment of the present application determines that the failure control parameters include the deletion property of the unit as deletion upon failure, which can simulate the actual fracture situation of the vehicle display device bracket, improve accuracy, and also display the fracture process; determines that the constraints between the structural sub-models included in the model to be processed are contact constraints, so that the constraint settings conform to the actual constraints between the sub-structures included in the vehicle display device bracket, thereby improving the accuracy of the simulation test; determines the incremental step control parameters and the output control parameters, and realizes the output of the failure state value at each time step of the nonlinear simulation process to facilitate the determination of the fracture strength, thereby improving the test efficiency and accuracy; in addition, the simulation process of applying progressive fracture strength loads is simulated using nonlinear statics. Usually, the simulation process of nonlinear statics needs to gradually correct the solution through an iterative algorithm, and the iterative process may have non-convergence problems. For example, the deletion of the unit due to failure causes the stiffness matrix to mutate and cause singularity; through the failure control parameters, failure basis, failure criteria, contact constraints and incremental step control parameters, when the failed unit is deleted, the convergence of the simulation process using nonlinear statics is achieved.

[0117] The figure shows a schematic structural diagram of an embodiment of a simulation test device for a vehicle-mounted display device bracket of the present invention. Figure 11 As shown, the apparatus 1100 includes:

[0118] A first setting unit 1110 is configured to determine, in response to a failure parameter setting instruction, failure control parameters of units included in the model to be processed, as well as a failure model, a failure basis, and a failure criterion for the failure model; the failure control parameters include a deletion attribute of "delete upon failure"; and the model to be processed is a simulation model of a vehicle-mounted display device bracket obtained by meshing.

[0119] The second setting unit 1120 is configured to determine, in response to the simulation parameter setting instruction, that the constraints between the structural sub-models included in the model to be processed are contact constraints, and to determine the incremental step control parameters and output control parameters of the simulation process;

[0120] a simulation unit 1130 configured to, in response to a first test instruction, simulate a process of applying a progressive fracture strength load to the model to be processed using nonlinear statics based on the failure control parameter, the failure basis, the failure criterion, the contact constraint, the incremental step control parameter, and the output control parameter, and output a first simulation result; the first simulation result including target plasticity data and target failure state value of the unit at each time step;

[0121] The result determination unit 1140 is configured to determine the fracture strength of the vehicle-mounted display device bracket based on the target plastic mechanics data and the target failure state value at each time step.

[0122] In an optional manner, the first setting unit 1110 is used to determine that the deletion attribute of the unit is deletion upon failure, the maximum stiffness degradation coefficient of the unit is a first preset value, and the viscosity coefficient of the unit is a second preset value; the first preset value is the difference between 1 and a small positive number, and the second preset value is one tenth of the small positive number; the small positive number is a positive number between 0.001 and 0.01.

[0123] In an optional manner, the first setting unit 1110 is configured to determine that the failure model is a plastic failure model;

[0124] The failure basis of the plastic failure model is determined to be the fracture strain; the strain value corresponding to the fracture strain is the maximum true strain value of the material used for the vehicle-mounted display device bracket; the failure criterion of the plastic failure model is determined to be the energy criterion, and the fracture energy of the energy criterion is a third preset value; the third preset value is the square of a small positive number, and the small positive number is a positive number between 0.001 and 0.01.

[0125] In an optional manner, the model to be processed includes: a top cover middle beam sub-model, a bracket base sub-model, a bracket lower cover sub-model, a bracket upper cover sub-model and a bracket ball head sub-model; a second setting unit 1120 is used to respond to a constraint setting instruction to determine that the constraints between the top cover middle beam sub-model and the bracket base sub-model include point-to-surface contact constraints and surface-to-surface contact constraints; determine that the constraints between the bracket base sub-model and the bracket lower cover sub-model are surface-to-surface contact constraints; determine that the constraints between the bracket base sub-model and the bracket upper cover sub-model are surface-to-surface constraints; and determine that the constraints between the bracket upper cover sub-model and the bracket ball head sub-model are surface-to-surface constraints.

[0126] In an optional manner, the incremental step control parameters include: an initial incremental step and a maximum incremental step, and the initial incremental step is twice the maximum incremental step; the output control parameters include: plastic mechanics data and failure state value of the unit.

[0127] In an optional manner, the result determination unit 1140 is used to take the time step corresponding to the first target failure state value indicating failure as the first target time step; when the target plastic mechanics data corresponding to the first target time step meets the failure condition, the fracture strength of the vehicle-mounted display device bracket is determined according to the first target time step and a preset fracture strength load threshold.

[0128] In an optional manner, the first simulation result also includes the first node displacement of each time step; the result determination unit 1140 is used to determine the second target time step based on the preset display device gravity and the preset fracture strength load threshold; and the first node displacement corresponding to the second target time step is used as the downward displacement of the display device.

[0129] In an optional manner, the simulation unit 1130 is used to respond to a second test instruction, based on the failure control parameters, the failure basis, the failure criterion and the contact constraint, use nonlinear statics simulation to apply a progressive pull-out force to the model to be processed, and output a second simulation result; the second simulation result includes the second node displacement of each time step; the result determination unit 1140 is used to determine a third target time step for the displacement mutation based on the second node displacement of each time step; and determine the critical pull-out force of the vehicle-mounted display device bracket according to the third target time step and a preset pull-out force threshold.

[0130] Figure 12 The schematic diagram of the structure of an embodiment of the electronic device of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the electronic device.

[0131] like Figure 12As shown, the electronic device may include: a processor (processor) 1202 , a communication interface (Communications Interface) 1204 , a memory (memory) 1206 , and a communication bus 1208 .

[0132] Processor 1202, communication interface 1204, and memory 1206 communicate with each other via communication bus 1208. Communication interface 1204 is used to communicate with other devices, such as client devices or other server network elements. Processor 1202 is used to execute program 1210, which may specifically perform the steps described in the embodiment of the simulation test method for a vehicle-mounted display device bracket.

[0133] Specifically, the program 1210 may include program code including computer-executable instructions.

[0134] Processor 1202 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The one or more processors included in an electronic device may be processors of the same type, such as one or more CPUs, or processors of different types, such as one or more CPUs and one or more ASICs.

[0135] The memory 1206 is used to store the program 1210. The memory 1206 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0136] The program 1210 can be specifically called by the processor 1202 to enable the electronic device to execute the above-mentioned simulation test method of the vehicle-mounted display device bracket.

[0137] An embodiment of the present invention provides a computer-readable storage medium, which stores at least one executable instruction. When the executable instruction is run on a simulation test device for an electronic device / vehicle-mounted display device bracket, the simulation test device for the electronic device / vehicle-mounted display device bracket enables the simulation test method for the vehicle-mounted display device bracket in any of the above-mentioned method embodiments.

[0138] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system or other device. In addition, the embodiments of the present invention are not directed to any particular programming language.

[0139] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present invention may be practiced without these specific details. Similarly, in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. The claims that follow the detailed description are hereby expressly incorporated into that detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0140] Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively changed and installed in one or more devices different from the embodiments. The modules, units, or components in the embodiments can be combined into one module, unit, or component, and furthermore, they can be divided into multiple submodules, subunits, or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive.

[0141] It should be noted that the above embodiments illustrate rather than limit the invention, and that alternative embodiments may be devised by a person skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments should not be understood as limiting the order of execution unless otherwise specified.

Claims

1. A simulation test method for a vehicle-mounted display device bracket, characterized in that: The method comprises: In response to a failure parameter setting instruction, determining failure control parameters of units included in the model to be processed, as well as determining a failure model, a failure basis of the failure model, and a failure criterion; the failure control parameters include a deletion attribute of "delete upon failure"; the model to be processed is obtained by meshing a simulation model of a vehicle-mounted display device bracket; In response to the simulation parameter setting instruction, determining that the constraints between the structural sub-models included in the to-be-processed model are contact constraints, and determining the incremental step control parameters and output control parameters of the simulation process; In response to a first test instruction, based on the failure control parameter, the failure basis, the failure criterion, the contact constraint, the incremental step control parameter, and the output control parameter, a nonlinear static simulation is used to simulate a process of applying a progressive fracture strength load to the model to be processed, and a first simulation result is output; the first simulation result includes target plasticity data and target failure state value of the unit at each time step; The fracture strength of the vehicle-mounted display device bracket is determined based on the target plastic mechanics data and the target failure state value at each time step.

2. The method according to claim 1, characterized in that The step of determining the failure control parameters of the units included in the model to be processed includes: Determining that the deletion property of the unit is deletion upon failure, the maximum stiffness degradation coefficient of the unit is a first preset value, and the viscosity coefficient of the unit is a second preset value; The first preset value is the difference between 1 and a small positive number, and the second preset value is one tenth of the small positive number; the small positive number is a positive number between 0.001 and 0.

01.

3. The method according to claim 1 or 2, characterized in that The determination of the failure model, the failure basis of the failure model and the failure criteria include: Determine the failure model as plastic failure model; Determining the failure basis of the plastic failure model as fracture strain; the strain value corresponding to the fracture strain is the maximum true strain value of the material used for the vehicle-mounted display device bracket; The failure criterion for determining the plastic failure model is an energy criterion, and the fracture energy of the energy criterion is a third preset value; the third preset value is the square of a small positive number, and the small positive number is a positive number between 0.001 and 0.

01.

4. The method according to claim 1, wherein The models to be processed include: a top cover middle beam sub-model, a bracket base sub-model, a bracket lower cover sub-model, a bracket upper cover sub-model and a bracket ball head sub-model; The step of determining that the constraints between the structural sub-models included in the model to be processed are contact constraints includes: In response to a constraint setting instruction, determining that the constraints between the crossbeam sub-model in the top cover and the bracket base sub-model include a point-to-surface contact constraint and a surface-to-surface contact constraint; Determine that the constraint between the support base sub-model and the support lower cover sub-model is a surface-to-surface contact constraint; Determine that the constraint between the bracket base sub-model and the bracket upper cover sub-model is a surface constraint; The constraint between the bracket upper cover sub-model and the bracket ball head sub-model is determined to be a surface constraint.

5. The method according to claim 1 or 4, characterized in that The incremental step control parameters include: an initial incremental step and a maximum incremental step, wherein the initial incremental step is twice the maximum incremental step; The output control parameters include: plastic mechanics data and failure state value of the unit.

6. The method according to any one of claims 1, 2 and 4, characterized in that: The determining the fracture strength of the vehicle-mounted display device bracket based on the target plastic mechanics data and the target failure state value at each time step includes: The time step corresponding to the first target failure state value indicating failure is used as the first target time step; When the target plastic mechanics data corresponding to the first target time step meets a failure condition, the fracture strength of the vehicle-mounted display device bracket is determined according to the first target time step and a preset fracture strength load threshold.

7. The method according to any one of claims 1, 2 and 4, characterized in that: The first simulation result also includes the first node displacement at each time step; the method further includes: determining a second target time step according to a preset display device gravity and a preset fracture strength load threshold; The first node displacement corresponding to the second target time step is used as the downward displacement of the display device.

8. The method according to any one of claims 1, 2 and 4, characterized in that: The method further comprises: In response to a second test instruction, based on the failure control parameter, the failure basis, the failure criterion, and the contact constraint, a nonlinear statics simulation is performed to simulate a process of applying a progressive pull-out force to the model to be processed, and a second simulation result is output; the second simulation result includes a second node displacement at each time step; Determining a third target time step for displacement mutation based on the displacement of the second node at each time step; The critical pull-out force of the vehicle-mounted display device bracket is determined according to the third target time step and a preset pull-out force threshold.

9. A simulation test device for a vehicle-mounted display device bracket, characterized in that: The device comprises: a first setting unit configured to determine, in response to a failure parameter setting instruction, failure control parameters of units included in the model to be processed, as well as a failure model, a failure basis of the failure model, and a failure criterion; the failure control parameters including a deletion attribute of "delete upon failure"; and the model to be processed being a simulation model of the vehicle-mounted display device bracket obtained by meshing; A second setting unit is configured to, in response to a simulation parameter setting instruction, determine that the constraints between the structural sub-models included in the model to be processed are contact constraints, and determine an incremental step control parameter and an output control parameter of the simulation process; a simulation unit, configured to, in response to a first test instruction, simulate a simulation process of applying a progressive fracture strength load to the model to be processed using nonlinear statics based on the failure control parameter, the failure basis, the failure criterion, the contact constraint, the incremental step control parameter, and the output control parameter, and output a first simulation result; the first simulation result including target plastic mechanics data and target failure state value of the unit at each time step; A result determination unit is used to determine the fracture strength of the vehicle-mounted display device bracket based on the target plastic mechanics data and the target failure state value at each time step.

10. An electronic device, characterized in that: include: A processor, a memory, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operation of the simulation test method of the vehicle-mounted display device bracket according to any one of claims 1-8.

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