Simulation analysis method, device and equipment for strength of front-end cooling module mounting structure and medium

Abstract

The invention belongs to the technical field of structural strength, and particularly provides a front-end cooling module installation structural strength simulation analysis method, device and equipment and a medium. The method comprises the steps that vehicle body structural data and front-end cooling module parameters are obtained; carrying out finite element modeling of a vehicle body structure and parametric modeling of a front-end module on the basis of the acquired data and parameters; the assembly connection of the vehicle body structure and the front-end cooling module is realized; setting boundary conditions, and analyzing the mounting structure strength of the front-end cooling module based on the boundary conditions; and judging whether the mounting structure strength of the front-end cooling module meets the requirement based on the analysis result and the material yield strength, and outputting a judgment result. By simulating the nonlinear characteristics of the front-end cooling module and the vehicle body mounting rubber mat, the actual stress condition of the vehicle body structure can be simulated, and by analyzing the strength of the front-end cooling module mounting structure in the engineering data design stage, the structural strength risk can be judged in advance and optimized and avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of structural strength, and in particular relates to a method, device, equipment and medium for simulating and analyzing the installation structural strength of a front-end cooling module. Background Art

[0002] The front-end cooling module of an automobile is an important component of the automobile cooling system, which usually includes a radiator, a condenser, and an electric fan. In order to isolate the rotation excitation of the electric fan and the flow excitation of the liquid in the radiator and condenser, the front-end cooling module is usually installed on the body structure through a bushing or a vibration isolation pad. For low-cost mid- and low-end models, the vibration isolation pad is the most commonly used installation method. The installation form is usually to first assemble the vibration isolation pad to the front-end cooling module, then align the upper pad with the upper mounting hole of the body for insertion and installation, and finally align the lower pad with the lower mounting hole of the body for seat installation. The weight of the front-end cooling module is relatively large, and the weight under liquid filling can reach more than 20 kilograms. Under the working conditions of acceleration, deceleration, steering, and bumps of the car, due to the inertia of the front-end cooling module, the mounting structure on the body will be subject to a large load. Therefore, the strength analysis of its mounting structure is a routine analysis item for the OEM.

[0003] The existing simulation model and analysis method of the strength of the front-end cooling module installation structure are mainly carried out in the following ways: finite element modeling of the vehicle body installation structure, simulating the front-end cooling module with concentrated mass, connecting the concentrated mass to the vehicle body mounting hole through a flexible unit, and then simulating the acceleration, deceleration, steering, and bumpy conditions of the vehicle through force field loading, and judging the strength risk through the stress of the vehicle body structure.

[0004] The defects of the above method are mainly as follows: 1. It is impossible to simulate the connection boundary between the front-end cooling module and the vehicle body structure. The front-end cooling module is installed on the vehicle body through a rubber pad. The force transmission characteristics of the rubber pad are expressed through its stiffness curve. The hardness (stiffness) of the rubber pad directly affects the stress and deformation of the vehicle body; 2. It is impossible to simulate the actual stress of the vehicle body structure. For example, under upward bumpy conditions, the front-end cooling module moves upward, and the upper mounting hole corresponding to the vehicle body is subjected to an upward force. At this time, the lower mounting hole of the vehicle body tends to be detached from the front-end cooling module, so the lower mounting hole of the vehicle body is not subjected to stress. However, the existing analysis method is to connect the front-end cooling module to the mounting hole of the vehicle body through a flexible unit, resulting in all mounting holes on the vehicle body being subjected to stress. Summary of the invention

[0005] The purpose of the present invention is to propose a front-end cooling module installation structure strength simulation analysis method, device, equipment and medium to eliminate the problem that the connection boundary between the front-end cooling module and the vehicle body structure and the actual force problem of the vehicle body structure cannot be simulated in the prior art.

[0006] In a first aspect, the technical solution of the present invention provides a front-end cooling module installation structure strength simulation analysis method, comprising: Obtain body structure data and front-end cooling module parameters; Carry out finite element modeling of the body structure and parametric modeling of the front-end module based on the acquired data and parameters; and realize the assembly connection between the body structure and the front-end cooling module; Set boundary conditions and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; Based on the analysis results and the material yield strength, determine whether the front-end cooling module installation structure strength meets the requirements and output the judgment result.

[0007] As a further limitation of the technical solution of the present invention, the step of obtaining the vehicle body structure data and the front-end cooling module parameters includes: Obtain data for finite element modeling of the vehicle body structure, including the body-in-white welding assembly, front end components, front bumper beams and their connections; Obtain the parameters of the front-end cooling module, including center of mass, mass, and moment of inertia; Obtain the compression load deformation value of the front-end cooling module installation pad, including 2 radial and 1 axial displacement load values; among which, the axial direction is a unidirectional deformation.

[0008] As a further limitation of the technical solution of the present invention, the steps of performing finite element modeling of the vehicle body structure and parametric modeling of the front-end module based on the acquired data and parameters; and realizing the assembly connection between the vehicle body structure and the front-end cooling module include: Car body strength analysis finite element model building based on the acquired car body structure data; The front-end cooling module is simulated by using a concentrated mass unit in a parametric modeling method, and the mechanical parameters of the front-end cooling module are assigned to the concentrated mass unit; A parametric modeling method is adopted to simulate the installation of rubber pads with zero-length bushing units, and attribute information is given to the bushing units. The assembly connection between the body structure and the front-end cooling module is realized through the bushing units.

[0009] As a further limitation of the technical solution of the present invention, the steps of simulating the installation of the rubber pad with a 0-length bushing unit by using a parametric modeling method, assigning attribute information to the bushing unit, and realizing the assembly connection between the vehicle body structure and the front cooling module through the bushing unit include: The mounting surfaces of the front cooling modules located at the mounting holes on the vehicle body are connected with flexible units respectively to form four flexible units and four unit slave nodes; Copy the 4 elements from the node and offset them by a distance of L, and establish a rigid element with the concentrated mass element node as the main node; The two ends of the bushing unit are respectively connected to the slave node of the flexible unit at the mounting hole and the replica node of the slave node; The copy node of the slave node is offset by a distance of negative L to obtain a bushing unit with a length of zero, and attribute information is given to the bushing unit; The assembly connection between the body structure and the front-end cooling module is realized through the bushing unit to generate a simulation model.

[0010] The rubber pad or bushing connection is installed through the numerical simulation of compression load deformation to achieve the unidirectional force simulation of the soft pad or bushing.

[0011] As a further limitation of the technical solution of the present invention, the steps of realizing the assembly connection between the vehicle body structure and the front cooling module through the bushing unit include: The bushing unit is located at the elastic center point of the mounting rubber pad, one end of the bushing unit is connected to the front cooling module through a rigid unit, and the other end of the bushing unit is connected to the vehicle body bracket through a flexible unit.

[0012] The concentrated mass unit + rigid unit simulates the front cooling module assembly and its connection with the body assembly. The model's degrees of freedom are simplified, while accurately realizing the excitation transmission of the front cooling module to the body structure under various working conditions.

[0013] As a further limitation of the technical solution of the present invention, the bushing unit parameters include stiffness and compression load displacement values; When linear analysis is used, the simulation model calls for stiffness; When nonlinear analysis is used, the simulation model calls the compression load displacement value. At the same time, the compression load displacement value reflects the force transmission of the up and down movement of the front-end cooling module to the vehicle body structure, that is, the upper rubber pad is only subjected to upward compression load, and the lower rubber pad is only subjected to downward compression load.

[0014] As a further limitation of the technical solution of the present invention, the steps of setting boundary conditions and performing the front-end cooling module installation structure strength analysis based on the boundary conditions include: Set boundary conditions to fully constrain the connection points between the vehicle body and the frame; Consider setting loads under different working conditions; Set material parameters in a linear manner; The strength analysis of the front-end cooling module installation structure is carried out based on boundary nonlinearity.

[0015] The front-end cooling module installation structure strength is calculated based on boundary nonlinearity, and the compression load deformation value of the simulated installation cushion or bushing can be called to achieve accurate stress calculation.

[0016] In a second aspect, the technical solution of the present invention provides a front-end cooling module installation structure strength simulation analysis device, including a parameter data acquisition module, a modeling assembly module, an analysis setting module and a result determination module; A parameter data acquisition module, used to acquire vehicle body structure data and front-end cooling module parameters; Modeling and assembly module, used to perform finite element modeling of the body structure and parametric modeling of the front-end module based on the acquired data and parameters; and to realize the assembly connection between the body structure and the front-end cooling module; An analysis setting module is used to set boundary conditions and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; The result determination module is used to determine whether the installation structure strength of the front-end cooling module meets the requirements based on the analysis results and the material yield strength, and output the determination result.

[0017] As a further limitation of the technical solution of the present invention, the parameter data acquisition module is specifically used to obtain data for finite element modeling of the vehicle body structure, including the white body welding assembly, the front end component, the front bumper beam and its connecting parts; obtain the front end cooling module parameters, including the center of mass, mass, moment of inertia / moment of inertia; obtain the compression load deformation value of the front end cooling module installation pad, including 2 radial and 1 axial displacement load values; wherein the axial direction is a unidirectional deformation.

[0018] As a further limitation of the technical solution of the present invention, the modeling and assembly module includes a body modeling unit, a front-end module modeling unit, and a parameter modeling and assembly unit; A body modeling unit, used for modeling a finite element model for body strength analysis based on the acquired body structure data; A front-end module modeling unit, used to simulate the front-end cooling module using a concentrated mass unit in a parametric modeling manner, and to assign mechanical parameters of the front-end cooling module to the concentrated mass unit; The parametric modeling assembly unit is used to simulate the installation of the rubber pad with a zero-length bushing unit by adopting a parametric modeling method, to give the bushing unit attribute information, and to realize the assembly connection between the vehicle body structure and the front-end cooling module through the bushing unit.

[0019] As a further limitation of the technical solution of the present invention, the parameter modeling assembly unit is specifically used to connect the mounting surface of the front-end cooling module located at the mounting hole on the body with flexible units to form 4 flexible units and 4 unit slave nodes; copy the 4 unit slave nodes and offset the distance L, and establish a rigid unit with the concentrated mass unit node as the main node; connect the flexible unit slave node at the mounting hole and the copy node of the slave node at both ends of the bushing unit; offset the copy node of the slave node by a distance of negative L to obtain a bushing unit with a length of 0, and assign attribute information to the bushing unit; realize the assembly connection between the body structure and the front-end cooling module through the bushing unit to generate a simulation model. Here, the front-end cooling module installation structure strength simulation model can simulate the actual vehicle working conditions, especially the body structure stress under the vertical load.

[0020] As a further limitation of the technical solution of the present invention, the bushing unit is located at the elastic center point of the mounting rubber pad, one end of the bushing unit is connected to the front cooling module through a rigid unit, and the other end of the bushing unit is connected to the vehicle body bracket through a flexible unit.

[0021] As a further limitation of the technical solution of the present invention, the bushing unit parameters include stiffness and compression load displacement values; When linear analysis is used, the simulation model calls for stiffness; When nonlinear analysis is used, the simulation model calls the compression load displacement value. At the same time, the compression load displacement value reflects the force transmission of the up and down movement of the front-end cooling module to the vehicle body structure, that is, the upper rubber pad is only subjected to upward compression load, and the lower rubber pad is only subjected to downward compression load.

[0022] As a further limitation of the technical solution of the present invention, an analysis setting module is used to set boundary conditions to fully constrain the connection points between the vehicle body and the frame; set loads considering different working conditions; set material parameters in a linear manner; and perform strength analysis of the front-end cooling module installation structure based on boundary nonlinearity.

[0023] The strength analysis of the front-end cooling module installation structure can accurately calculate the structural stress level by considering the boundary nonlinearity of the strength analysis.

[0024] In a third aspect, the technical solution of the present invention provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; the memory stores computer program instructions executable by the at least one processor, and the computer program instructions are executed by the at least one processor so that the at least one processor can execute the front-end cooling module installation structure strength simulation analysis method as described in the first aspect.

[0025] In a fourth aspect, the technical solution of the present invention further provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions enable the computer to execute the front-end cooling module installation structure strength simulation analysis method as described in the first aspect.

[0026] It can be seen from the above technical scheme that the present invention has the following advantages: the front-end cooling module installation structure strength simulation model and analysis method proposed in the present invention can simulate the actual stress conditions of the vehicle body structure by simulating the nonlinear characteristics of the front-end cooling module and the vehicle body installation rubber pad, especially the unidirectional stress characteristics of the rubber pad under the action of upper / lower loads. Through the front-end cooling module installation structure strength analysis in the engineering data design stage, the structural strength risk can be determined in advance and optimized and avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a schematic flow chart of a method according to an embodiment of the present invention.

[0029] Figure 2 It is a diagram of the strength analysis model of the front-end cooling module installation structure.

[0030] Figure 3 It is an upward 3.5G stress cloud map.

[0031] Figure 4 It is a downward 3.5G stress cloud map.

[0032] Figure 5 is a schematic block diagram of an apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The purpose of the present invention is to propose a simulation analysis method for the strength of the front-end cooling module installation structure, so as to eliminate the problem that the connection boundary between the front-end cooling module and the vehicle body structure and the actual stress of the vehicle body structure cannot be simulated in the prior art, and the risk judgment and optimization avoidance of the strength of the front-end cooling module installation structure can be achieved in the engineering data design stage through accurate simulation of the connection boundary of the front-end cooling module and the stress of the vehicle body.

[0034] As mentioned above, since the vibration isolation rubber pad is currently the most commonly used installation method for the front-end cooling module, the present invention describes the front-end cooling module installation structure strength analysis method for the vibration isolation rubber pad installation method, and the analysis method for the bushing installation method is similar to the rubber pad. The bumpy working condition is usually the worst working condition among the above-mentioned working conditions, so the present invention only describes the front-end cooling module installation structure strength analysis method under the bumpy working condition, and the analysis methods for other working conditions are similar. In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] like Figure 1 As shown, an embodiment of the present invention provides a front-end cooling module installation structure strength simulation analysis method, comprising: Step 1: Obtain body structure data and front-end cooling module parameters; Based on the expected effect to be achieved by this application, relevant data and parameters need to be collected, including vehicle body structure data, front-end cooling module parameters, and front-end cooling module installation pad compression load deformation values.

[0036] Step 2: Perform finite element modeling of the vehicle body structure and parametric modeling of the front-end module based on the acquired data and parameters; and realize the assembly connection between the vehicle body structure and the front-end cooling module; In this step, the installation of the rubber pad is simulated by a 0-length bushing unit, and the assembly connection between the body structure and the front-end cooling module is realized through the bushing unit.

[0037] Step 3: Set boundary conditions, and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions to obtain stress analysis results; Step 4: Based on the analysis results and the material yield strength, determine whether the front-end cooling module installation structure strength meets the requirements and output the determination result.

[0038] Based on the stress analysis results and material yield strength, determine whether the front-end cooling module installation structure strength meets the requirements. If it does, end the analysis; if not, optimize the body installation structure and analyze and calculate again until the strength results meet the requirements.

[0039] In some embodiments, the step of obtaining vehicle body structure data and front-end cooling module parameters includes: Step 101: Acquire data for finite element modeling of the vehicle body structure, including the body-in-white welding assembly, the front end member, the front bumper beam and its connecting parts; It should be noted that the body in white (BiW) refers to the body structure that has been welded but not yet painted.

[0040] Step 102: Obtain parameters of the front-end cooling module, including center of mass, mass, and moment of inertia; In the embodiment of the present invention, in the vehicle coordinate system, the parameter table of the front-end cooling module is shown in Table 1.

[0041] Table 1: Front-end cooling module parameter table

[0042] Step 103: Obtaining a compression load deformation value of a rubber pad installed on a front-end cooling module; The direction of the compression load deformation of the rubber pad in this example is the same as the vehicle coordinate system, and the compression load deformation value of the rubber pad installed in the front cooling module is shown in Table 2. Among them, XY is the radial direction of the rubber pad, and Z is the axial direction of the rubber pad. Based on the installation method and movement relationship, the upper rubber pad is only subject to the upward (positive Z direction) compression load, and the lower rubber pad is only subject to the downward (negative Z direction) compression load.

[0043] Table 2: Compression load deformation value table of front cooling module installation rubber pad

[0044] In some embodiments, the steps of performing finite element modeling of the vehicle body structure and parametric modeling of the front-end module based on the acquired data and parameters, and realizing the assembly connection between the vehicle body structure and the front-end cooling module include: Step 201: Modeling a finite element model for vehicle body strength analysis based on the acquired vehicle body structure data; Car body strength analysis finite element model building is performed according to corporate standard documents or industry common methods.

[0045] Step 202: using a parametric modeling method to simulate the front-end cooling module using a concentrated mass unit, and assigning mechanical parameters of the front-end cooling module to the concentrated mass unit; The mass and moment of inertia / inertia of the front cooling module are assigned to the concentrated mass element.

[0046] When the front-end cooling module is simulated using a concentrated mass unit, the unit coordinates are the centroid coordinates in Table 1.

[0047] Step 203: using a parametric modeling method to simulate the installation of the rubber pad using a bushing unit with a length of 0, and assigning bushing unit attribute information; Installation pad simulation: Use 0-length bushing unit to simulate the installation pad. The bushing unit parameters contain two parts of information: one is stiffness. When linear analysis is used, the model will call this stiffness; the other is the compression load displacement value: when nonlinear analysis is used, the model will call this value. At the same time, the compression load displacement value must reflect the force transmission of the up and down movement of the front-end module to the body structure, that is, the upper pad is only subject to upward (positive Z-direction) compression load, and the lower pad is only subject to downward (negative Z-direction) compression load; In the embodiment of the present invention, the bushing unit parameters include two parts of information. One is stiffness: the bushing stiffness is the linear stiffness at small displacement (i.e., the load corresponding to the displacement of 0.5 mm in Table 1 divided by the displacement). In this embodiment, the upper bushing unit has an XY stiffness of 82 N / mm and a Z stiffness of 110 N / mm, and the lower bushing unit has an XY stiffness of 120 N / mm and a Z stiffness of 160 N / mm. When linear analysis is used, the model will call this stiffness. The second is the compression load displacement value: the upper and lower bushing units use the corresponding displacement and load values ​​in Table 2 in the XY and Z directions respectively. At the same time, in order to simulate the unidirectional force characteristics of the upper and lower rubber pads in the vertical direction, in this embodiment, the load values ​​of the upper bushing unit with Z displacements of -0.5 and 0 mm are both set to 0 N, and the load values ​​of the lower bushing unit with Z displacements of 0.5 and 0 mm are both set to 0 N, so that the simulation calculation can simulate the force transmission of the up and down movement of the front-end module to the vehicle body structure. When nonlinear analysis is used, the model will call the compression load displacement value.

[0048] Step 204: Assembling and connecting the vehicle body structure and the front-end cooling module through the bushing unit.

[0049] It should be noted that the steps of using parametric modeling to simulate the installation of rubber pads with zero-length bushing units, assigning bushing unit attribute information, and realizing the assembly connection between the vehicle body structure and the front-end cooling module through the bushing units include: assembling the front-end cooling module installation structure strength analysis model, using flexible units (flexible units only distribute the load and do not change the structural stiffness) to respectively connect the mounting surfaces of the front-end cooling module located at the mounting holes on the vehicle body to form 4 flexible units and 4 unit slave nodes, copying these 4 slave nodes and offsetting them by a distance L, and using the concentrated mass unit node in step 202 as the main node to establish a rigid unit. Use bushing units to simulate the installation of rubber pads, and connect the flexible unit slave nodes at the mounting holes and their copy nodes at both ends of the unit in a one-to-one correspondence. Finally, offset the copy nodes by a distance of negative L to obtain zero-length bushing units, and assign unit attributes as described in step 203. The obtained analysis model is as follows: Figure 2 shown.

[0050] Correspondingly, the step of realizing the assembly connection between the vehicle body structure and the front-end cooling module through the bushing unit includes: the bushing unit is located at the elastic center point of the mounting rubber pad, one end of the bushing unit is connected to the front-end cooling module through a rigid unit, and the other end of the bushing unit is connected to the vehicle body bracket through a flexible unit.

[0051] The bushing unit parameters include stiffness and compression load displacement values. When linear analysis is used, the simulation model calls the stiffness; when nonlinear analysis is used, the simulation model calls the compression load displacement value. At the same time, the compression load displacement value reflects the force transmission of the up and down movement of the front-end cooling module to the vehicle body structure, that is, the upper rubber pad is only subject to upward compression load, and the lower rubber pad is only subject to downward compression load.

[0052] In some embodiments, the steps of setting boundary conditions and performing a front-end cooling module installation structure strength analysis based on the boundary conditions include: Step 301: Boundary conditions are set to fully constrain the connection points between the vehicle body and the frame.

[0053] Step 302: Load setting. This embodiment simulates the bumpy working condition on a bad road. Working condition 1: 3.5G upward (G is the acceleration of gravity). Considering the influence of 1G gravity, the actual load is 2.5G in the Z direction. Working condition 2: 3.5G downward. Considering the influence of 1G gravity, the actual load is 4.5G in the negative Z direction.

[0054] Step 303: Nonlinear setting. Considering that the evaluation criterion for the strength analysis of the front-end cooling module installation structure is that the stress does not exceed the yield, the material parameters can be set in a linear manner. The loading of the load causes the rubber pad to deform, and the stiffness of the rubber pad under different deformation amounts is inconsistent, resulting in a nonlinear boundary. Therefore, the strength analysis of the front-end cooling module installation structure must be performed based on the boundary nonlinearity. The nonlinear characteristics of the boundary are reflected and simulated in step 203. In this step, loading is performed in a quasi-static manner at intervals of 0.1s, and the total loading time is 1 second.

[0055] In an embodiment of the present invention, the method further includes: strength analysis result determination and vehicle body structure optimization; specifically including: Step 401: Processing and determining the analysis results. The front-end cooling module installation structure strength analysis results obtained in this embodiment are shown in Table 3. The stress cloud diagram is shown in Table 3. Figure 3 and Figure 4 As shown, under the upward 3.5G working condition, the upper mounting bracket deforms and the stress exceeds the yield point, while the lower mounting bracket has almost no stress, indicating that only the upper bracket is stressed under this working condition; under the downward 3.5G working condition, the lower mounting bracket deforms. Due to the large rigidity of the lower mounting bracket, the deformation and stress are relatively small, while the upper packaging bracket has almost no stress, indicating that only the lower bracket is stressed under this working condition. The above analysis results are consistent with the stress of the actual vehicle. In order to more clearly illustrate the accuracy of the method of the present invention relative to the existing method, Table 3 also lists the strength analysis results based on the existing method and the actual vehicle road test results.

[0056] Table 3: Front-end cooling module installation structure strength analysis results

[0057] Step 402: The front-end cooling module installation structure is optimized. In this embodiment, the thickness of the upper bracket is increased from 1.5 to 2.5 mm, and the stress is reduced from 392 to 235 MPa, meeting the material yield strength requirements.

[0058] like Figure 5 As shown, an embodiment of the present invention provides a front-end cooling module installation structure strength simulation analysis device, including a parameter data acquisition module, a modeling assembly module, an analysis setting module and a result determination module; A parameter data acquisition module, used to acquire vehicle body structure data and front-end cooling module parameters; Modeling and assembly module, used to perform finite element modeling of the body structure and parametric modeling of the front-end module based on the acquired data and parameters; and to realize the assembly connection between the body structure and the front-end cooling module; An analysis setting module is used to set boundary conditions and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; The result determination module is used to determine whether the installation structure strength of the front-end cooling module meets the requirements based on the analysis results and the material yield strength, and output the determination result.

[0059] In some embodiments, the parameter data acquisition module is specifically used to obtain data for finite element modeling of the vehicle body structure, including the body-in-white welding assembly, front end components, front bumper beam and its connecting parts; obtain the front end cooling module parameters, including the center of mass, mass, moment of inertia / moment of inertia; obtain the compression load deformation value of the front end cooling module installation pad, including 2 radial and 1 axial displacement load values; wherein the axial direction is a unidirectional deformation.

[0060] In some embodiments, the modeling and assembly module includes a vehicle body modeling unit, a front end module modeling unit, and a parameter modeling and assembly unit; A body modeling unit, used for modeling a finite element model for body strength analysis based on the acquired body structure data; A front-end module modeling unit, used to simulate the front-end cooling module using a concentrated mass unit in a parametric modeling manner, and to assign mechanical parameters of the front-end cooling module to the concentrated mass unit; The parametric modeling assembly unit is used to simulate the installation of the rubber pad with a zero-length bushing unit by adopting a parametric modeling method, to give the bushing unit attribute information, and to realize the assembly connection between the vehicle body structure and the front-end cooling module through the bushing unit.

[0061] In some embodiments, the parameter modeling assembly unit is specifically used to connect the mounting surfaces of the front-end cooling module at the mounting holes on the vehicle body with flexible units to form four flexible units and four unit slave nodes; the four unit slave nodes are copied and offset by a distance L to establish a rigid unit with the concentrated mass unit node as the main node; the two ends of the bushing unit are respectively connected to the flexible unit slave node at the mounting hole and the copy node of the slave node; the copy node of the slave node is offset by a distance of negative L to obtain a bushing unit with a length of 0, and attribute information is given to the bushing unit; the assembly connection between the vehicle body structure and the front-end cooling module is realized through the bushing unit to generate a simulation model.

[0062] The bushing unit is located at the elastic center point of the mounting rubber pad, one end of the bushing unit is connected to the front cooling module through a rigid unit, and the other end of the bushing unit is connected to the vehicle body bracket through a flexible unit.

[0063] In some embodiments, bushing element parameters include stiffness and compressive load displacement values; When linear analysis is used, the simulation model calls for stiffness; When nonlinear analysis is used, the simulation model calls the compression load displacement value. At the same time, the compression load displacement value reflects the force transmission of the up and down movement of the front-end cooling module to the vehicle body structure, that is, the upper rubber pad is only subjected to upward compression load, and the lower rubber pad is only subjected to downward compression load.

[0064] In some embodiments, the analysis setting module is used to set boundary conditions, fully constrain the connection points between the vehicle body and the frame; set loads considering different working conditions; set material parameters in a linear manner; and perform strength analysis of the front-end cooling module installation structure based on boundary nonlinearity.

[0065] An embodiment of the present invention also provides an electronic device, which includes: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus. The communication bus can be used for information transmission between the electronic device and the sensor. The processor can call the logic instructions in the memory to execute the following method: Step 1: Acquire the body structure data and the front-end cooling module parameters; Step 2: Perform finite element modeling of the body structure and parametric modeling of the front-end module based on the acquired data and parameters; and realize the assembly connection between the body structure and the front-end cooling module; Step 3: Set boundary conditions, and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; Step 4: Determine whether the strength of the front-end cooling module installation structure meets the requirements based on the analysis results and the material yield strength, and output the determination result.

[0066] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.

[0067] An embodiment of the present invention provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions enable a computer to execute the method provided by the above method embodiment, for example, including: Step 1: Acquire vehicle body structure data and front-end cooling module parameters; Step 2: Perform finite element modeling of the vehicle body structure and parametric modeling of the front-end module based on the acquired data and parameters; and realize the assembly connection between the vehicle body structure and the front-end cooling module; Step 3: Set boundary conditions, and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; Step 4: Determine whether the strength of the front-end cooling module installation structure meets the requirements based on the analysis results combined with the material yield strength and output the determination result.

[0068] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0069] An embodiment of the front-end cooling module installation structure strength simulation analysis device provided in an embodiment of the present invention belongs to the same inventive concept as the front-end cooling module installation structure strength simulation analysis method of the above-mentioned embodiments. For details not fully described in the embodiment of the front-end cooling module installation structure strength simulation analysis device, reference can be made to the embodiment of the above-mentioned front-end cooling module installation structure strength simulation analysis method.

[0070] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A front-end cooling module installation structure strength simulation analysis method, characterized in that: include: Obtain body structure data and front-end cooling module parameters; Carry out finite element modeling of the body structure and parametric modeling of the front-end module based on the acquired data and parameters; and realize the assembly connection between the body structure and the front-end cooling module; Set boundary conditions and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; Based on the analysis results and the material yield strength, determine whether the front-end cooling module installation structure strength meets the requirements and output the judgment result.

2. The front-end cooling module installation structure strength simulation analysis method according to claim 1, characterized in that: The steps to obtain the vehicle body structure data and the parameters of the front cooling module include: Obtain data for finite element modeling of the vehicle body structure, including the body-in-white welding assembly, front end components, front bumper beams and their connections; Obtain the parameters of the front-end cooling module, including center of mass, mass, and moment of inertia; Obtain the compression load deformation value of the front-end cooling module installation pad, including 2 radial and 1 axial displacement load values; among which, the axial direction is a unidirectional deformation.

3. The front-end cooling module installation structure strength simulation analysis method according to claim 2, characterized in that: Carry out finite element modeling of the vehicle body structure and parametric modeling of the front-end module based on the acquired data and parameters; The steps of assembling and connecting the vehicle body structure and the front cooling module include: Car body strength analysis finite element model building based on the acquired car body structure data; The front-end cooling module is simulated by using a concentrated mass unit in a parametric modeling method, and the mechanical parameters of the front-end cooling module are assigned to the concentrated mass unit; A parametric modeling method is adopted to simulate the installation of rubber pads with zero-length bushing units, and attribute information is given to the bushing units. The assembly connection between the body structure and the front-end cooling module is realized through the bushing units.

4. The front-end cooling module installation structure strength simulation analysis method according to claim 3 is characterized in that: The steps of simulating the installation of the rubber pad with a zero-length bushing unit by using a parametric modeling method, assigning attribute information to the bushing unit, and realizing the assembly connection between the body structure and the front cooling module through the bushing unit include: The mounting surfaces of the front cooling modules located at the mounting holes on the vehicle body are connected with flexible units respectively to form four flexible units and four unit slave nodes; Copy the 4 elements from the node and offset them by a distance of L, and establish a rigid element with the concentrated mass element node as the main node; The two ends of the bushing unit are respectively connected to the slave node of the flexible unit at the mounting hole and the replica node of the slave node; The copy node of the slave node is offset by a distance of negative L to obtain a bushing unit with a length of zero, and attribute information is given to the bushing unit; The assembly connection between the body structure and the front-end cooling module is realized through the bushing unit to generate a simulation model.

5. The front-end cooling module installation structure strength simulation analysis method according to claim 4, characterized in that: The steps of assembling and connecting the vehicle body structure and the front cooling module through the bushing unit include: The bushing unit is located at the elastic center point of the mounting rubber pad, one end of the bushing unit is connected to the front cooling module through a rigid unit, and the other end of the bushing unit is connected to the vehicle body bracket through a flexible unit.

6. The front-end cooling module installation structure strength simulation analysis method according to claim 5, characterized in that: Bushing element parameters include stiffness and compression load displacement values; When linear analysis is used, the simulation model calls for stiffness; When nonlinear analysis is used, the simulation model calls the compression load displacement value. At the same time, the compression load displacement value reflects the force transmission of the up and down movement of the front-end cooling module to the vehicle body structure, that is, the upper rubber pad is only subjected to upward compression load, and the lower rubber pad is only subjected to downward compression load.

7. The front-end cooling module installation structure strength simulation analysis method according to claim 6, characterized in that: The steps of setting boundary conditions and performing strength analysis of the front-end cooling module installation structure based on the boundary conditions include: Set boundary conditions to fully constrain the connection points between the vehicle body and the frame; Consider setting loads under different working conditions; Set material parameters in a linear manner; The strength analysis of the front-end cooling module installation structure is carried out based on boundary nonlinearity.

8. A front-end cooling module installation structure strength simulation analysis device, characterized in that: It includes parameter data acquisition module, modeling assembly module, analysis setting module and result determination module; A parameter data acquisition module, used to acquire vehicle body structure data and front-end cooling module parameters; Modeling and assembly module, used for finite element modeling of vehicle body structure and parametric modeling of front-end module based on acquired data and parameters; And realize the assembly connection between the body structure and the front cooling module; An analysis setting module is used to set boundary conditions and perform strength analysis of the front-end cooling module installation structure based on the boundary conditions; The result determination module is used to determine whether the installation structure strength of the front-end cooling module meets the requirements based on the analysis results and the material yield strength, and output the determination result.

9. An electronic device, characterized in that: The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; the memory stores computer program instructions executable by the at least one processor, and the computer program instructions are executed by the at least one processor so that the at least one processor can execute the front-end cooling module installation structure strength simulation analysis method as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that: The non-transitory computer-readable storage medium stores computer instructions, and the computer instructions enable the computer to execute the front-end cooling module installation structure strength simulation analysis method according to any one of claims 1 to 7.

Images