Equivalent simulation method for vehicle component assembly boundary and computer readable storage medium

Abstract

The present invention discloses an equivalent simulation method for an assembly boundary of a vehicle component. First, a modal test is performed on the assembly boundary of the vehicle component to generate a test result file. Then, a first modal analysis file is obtained according to a first connection relationship between the vehicle component and the vehicle. A boundary area to be optimized is determined according to the test result file and the first modal analysis file. The connection relationship between the vehicle component and the vehicle in the boundary area to be optimized is adjusted from a rigid connection to a connection through an elastic unit to form a second connection relationship between the vehicle component and the vehicle. A plurality of second finite element models are generated. Simulation calculations are performed based on the plurality of second finite element models to obtain a plurality of second modal analysis files. An optimized modal frequency error and an optimized vibration shape similarity are obtained according to the test result file and the second modal analysis file. Assembly boundary influencing parameters are determined when the optimized modal frequency error and the optimized vibration shape similarity meet preset conditions.

Description

Technical Field

[0001] The present invention relates to the field of simulation test technology, and in particular to an equivalent simulation method for vehicle component assembly boundaries and a computer-readable storage medium. Background Art

[0002] In the field of automotive NVH (Noise, Vibration, Harshness) technology simulation, in order to understand the coupling mechanism of interior body structure, acoustic cavity, and porous sound-absorbing materials, so as to better guide body design in the early stage and reduce the noise inside the car, it is necessary to carry out a series of basic experiments and simulations on the three based on the rigid wall passenger compartment. Whether the finite element model can truly simulate the actual phenomenon is crucial. In automobiles, component constraints can be seen everywhere, and whether the constraint boundary simulation is appropriate is related to the accuracy of the entire finite element model.

[0003] In the related technology, the force transmission analysis of the structure and its connecting structure is generally carried out first to determine the assembly boundary stiffness matrix, and then determine the boundary flexibility matrix, invert the flexibility matrix, and finally obtain the stiffness matrix used in the finite element software. In this method, the data correlation and dependence between the steps are strong, and there may be a risk of all errors if one mistake is made, and eventually the finite element model will be distorted. In addition, when the force situation is complex, the force analysis is more complex, and the stiffness matrix calculation becomes complicated, which will reduce the efficiency of the entire analysis to a certain extent, and is not conducive to the extension of subsequent optimization and related work. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, one purpose of the present invention is to propose an equivalent simulation method for the assembly boundary of vehicle parts, which can reduce the difficulty of equivalent simulation and accurately simulate the influencing parameters of the assembly boundary of vehicle parts, provide reference data for the assembly of vehicle parts, thereby improving the assembly force accuracy of vehicle parts and better guiding the body design.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] To achieve the above-mentioned purpose, a first embodiment of the present invention provides an equivalent simulation method for the assembly boundary of a vehicle component, the method comprising: obtaining a test modal vibration shape and a test modal frequency of the vehicle component in a modal test, and generating a test result file;

[0007] Based on a first connection relationship between a vehicle component and a vehicle, a first finite element model is established, and based on the first finite element model, an assembly boundary influence parameter of the vehicle component is simulated and calculated to obtain a first modal analysis file, wherein in the first connection relationship, the vehicle component is rigidly connected to the vehicle;

[0008] Determining a boundary region to be optimized of the vehicle component according to the test result file and the first modal analysis file;

[0009] Based on a second connection relationship between the vehicle component and the vehicle, a plurality of second finite element models are generated, and simulation calculation is performed based on each of the second finite element models to obtain a plurality of second modal analysis files, wherein in the second connection relationship, the vehicle component within the boundary area to be optimized is connected to the vehicle via an elastic unit;

[0010] Modal benchmarking calculation is performed according to the test result file, each of the second modal analysis files and the corresponding second finite element model to obtain modal frequency error and vibration shape similarity, and assembly boundary influencing parameters that meet preset conditions are determined according to the optimized modal frequency error and optimized vibration shape similarity.

[0011] The equivalent simulation method of the assembly boundary of a vehicle component of the embodiment of the present invention first performs a modal test on the vehicle component to generate a test result file, then obtains a first modal analysis file according to the first connection relationship between the vehicle component and the vehicle, determines the boundary area to be optimized according to the test result file and the first modal analysis file, adjusts the connection relationship between the vehicle component and the vehicle in the boundary area to be optimized from a rigid connection to a connection through an elastic unit to form a second connection relationship between the vehicle component and the vehicle, generates multiple second finite element models based on the second connection relationship, and performs simulation calculations based on the multiple second finite element models to obtain multiple second modal analysis files, performs modal benchmarking calculations according to the test result file, the second modal analysis file and the second finite element model to obtain optimized modal frequency error and optimized vibration shape similarity, and determines the assembly boundary influencing parameters when the optimized modal frequency error and the optimized vibration shape similarity meet the preset conditions. Therefore, the equivalent simulation method of the assembly boundary of the vehicle component of the embodiment can reduce the difficulty of equivalent simulation, and can accurately simulate the influencing parameters of the assembly boundary of the vehicle component, provide reference data for the assembly of the vehicle component, and thus improve the assembly force accuracy of the vehicle component, better guide the body design, reduce the noise in the car, and improve the user experience.

[0012] In some embodiments of the present invention, the first modal analysis file includes a first mode shape and a first modal frequency;

[0013] Determining the boundary area to be optimized of the vehicle component according to the test result file and the first modal analysis file includes:

[0014] When the first modal frequency is greater than the test modal frequency, determining that the vehicle component has a boundary region to be optimized;

[0015] The first mode vibration shape is compared with the test mode vibration shape to determine the boundary area to be optimized.

[0016] In some embodiments of the present invention, the preset condition is: the modal frequency error is smaller than the preset frequency error and the vibration shape similarity is greater than the preset similarity.

[0017] In some embodiments of the present invention, a rubber strip is provided between the vehicle component and the vehicle, and the assembly boundary influence parameter includes: a stiffness value of the elastic unit and an elastic modulus of the rubber strip.

[0018] In some embodiments of the present invention, generating a plurality of second finite element models based on the second connection relationship between the vehicle component and the vehicle comprises:

[0019] At least one of the stiffness value and the elastic modulus of the boundary region to be optimized is changed to generate a plurality of second finite element models.

[0020] In some embodiments of the present invention, a rubber strip is provided between the vehicle component and the vehicle, changing the stiffness value of the boundary area to be optimized is changing the stiffness value of the elastic unit, and changing the elastic modulus of the boundary area to be optimized is changing the elastic modulus of the rubber strip.

[0021] In some embodiments of the present invention, obtaining the test modal vibration shape and the test modal frequency of the vehicle component in the modal test includes:

[0022] The vehicle component is controlled to perform a modal test within a first preset frequency, and the test modal vibration shape and the test modal frequency are obtained to generate the test result file.

[0023] In some embodiments of the present invention, the vehicle component is a vehicle component whose assembly force is uncontrollable.

[0024] To achieve the above objectives, a second embodiment of the present invention proposes a computer-readable storage medium on which an equivalent simulation program for vehicle component assembly boundaries is stored. When the simulation program is executed by a processor, the equivalent simulation method for vehicle component assembly boundaries described in the above embodiment is implemented.

[0025] The computer-readable storage medium of an embodiment of the present invention can reduce the difficulty of equivalent simulation by executing an equivalent simulation program of the vehicle component assembly boundary stored thereon, and can accurately simulate the influencing parameters of the vehicle component assembly boundary, provide reference data for the assembly of vehicle components, thereby improving the assembly force accuracy of vehicle components, better guiding vehicle body design, reducing noise inside the vehicle, and improving user experience.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a flow chart of an equivalent simulation method for vehicle component assembly boundaries according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following describes an equivalent simulation method and device for vehicle component assembly boundaries and a storage medium according to an embodiment of the present invention with reference to the accompanying drawings.

[0030] Figure 1 The figure is a flow chart of an equivalent simulation method for vehicle component assembly boundaries according to an embodiment of the present invention.

[0031] like Figure 1 As shown, the present invention proposes an equivalent simulation method for vehicle component assembly boundaries, the method comprising the following steps:

[0032] S10, obtaining the test modal vibration shape and test modal frequency of the vehicle component in the modal test, and generating a test result file.

[0033] Specifically, the vehicle components in this embodiment may be components whose assembly may affect the noise inside the vehicle, such as the front wall steel plate, the door, etc. In some embodiments, the vehicle components may also be vehicle components whose assembly force is uncontrollable. The equivalent simulation method in this embodiment can obtain accurate assembly force, so that the assembly force can be accurately controlled in the subsequent assembly process of the vehicle components, thereby improving the NVH performance of the vehicle.

[0034] In this embodiment, a modal test may be performed on the vehicle component to obtain the test modal vibration shape and the test modal frequency of the corresponding vehicle component. In some embodiments, the vehicle component may be controlled to perform a modal test within a first preset frequency to obtain the test modal vibration shape and the test modal frequency.

[0035] Optionally, when the vehicle component is a front wall steel plate, the first preset frequency may be 400 Hz. That is, the vehicle component is controlled to perform a modal test to obtain a test modal vibration shape and a test modal frequency of the front wall steel plate within 400 Hz, and a test result file may be generated. It is understood that the test result file includes the test modal vibration shape and the test modal frequency corresponding to the vehicle component under the modal test, and the test result file may be a file with a suffix of UNV.

[0036] S20, based on a first connection relationship between the vehicle component and the vehicle, establishing a first finite element model, and simulating and calculating assembly boundary influence parameters of the vehicle component based on the first finite element model to obtain a first modal analysis file, wherein in the first connection relationship, the vehicle component is rigidly connected to the vehicle.

[0037] Specifically, the embodiment is described by taking the front wall steel plate as a vehicle component, wherein a 3D (3 Dimensions, three-dimensional) geometric model of the front wall steel plate and the rigid wall passenger compartment can be obtained, and then the 3D model is subjected to finite element modeling pre-processing, such as meshing the 3D geometric model so that the quality of each mesh meets the requirements of modal analysis, and then the mesh model is connected according to the actual assembly relationship to establish a first finite element model. Since the front wall steel plate is installed on the vehicle by bolts, and the gap between the front wall steel plate and the vehicle is compressed, the gap is also sealed by a rubber strip to ensure the sound insulation effect of the vehicle. Therefore, in the first finite element model, the bolt hole position between the front wall steel plate and the rigid passenger compartment is connected by a rigid connection unit to realize the connection between the front wall steel plate and the passenger compartment, so that in the first connection relationship, the vehicle component is rigidly connected to the vehicle, and the rubber strip between the front wall steel plate and the rigid wall passenger compartment can be simulated by the modeling method of the sealant.

[0038] After the first finite element model is built, the assembly boundary influence parameters of the vehicle components are simulated and calculated based on the first finite element model, and a first modal analysis file can be obtained after the calculation is completed. Optionally, the first modal analysis file can be a file with a suffix of op2.

[0039] S30, determining a boundary region to be optimized of the vehicle component according to the test result file and the first modal analysis file.

[0040] Specifically, the first finite element model and the model in the test result file can be adjusted so that the two models are in the same position. More specifically, multiple nodes can be selected in the test result file, such as three nodes, and nodes in the same position can be selected on the first finite element model according to the positions of the three nodes, and then the nodes on the test result file and the nodes on the first finite element model are adjusted one by one to make the two models in the same position to complete the alignment. After the two models are aligned, the first modal analysis file of the first finite element model can be calculated, wherein the first modal analysis file includes the first modal vibration shape and the first modal frequency.

[0041] Wherein, determining the boundary area to be optimized of the vehicle component according to the test result file and the first modal analysis file includes:

[0042] When the first modal frequency is greater than the test modal frequency, it is determined that the vehicle component has a boundary area to be optimized; then the first modal vibration shape is compared with the test modal vibration shape to determine a region in the first modal vibration shape that is different from the test modal vibration shape, and the region is determined as the boundary area to be optimized.

[0043] More specifically, if it is determined that the first modal frequency is greater than the test modal frequency, it means that there is a large difference between the first finite element model and the modal test, and the accuracy of the first finite element model is poor and does not meet the requirements. Then, based on the first modal analysis and the test modal vibration shape, the area that does not meet the requirements is determined, and thus determined as the area to be optimized.

[0044] S40, based on a second connection relationship between the vehicle component and the vehicle, generating a plurality of second finite element models, and performing simulation calculations based on each of the second finite element models to obtain a plurality of second modal analysis files, wherein in the second connection relationship, the vehicle component within the boundary area to be optimized is connected to the vehicle via an elastic unit.

[0045] Specifically, after determining the boundary area to be optimized, the rigid connection relationship between the vehicle component and the vehicle in the boundary area to be optimized is adjusted to an elastic connection relationship in which the two are connected by an elastic unit, so that the parameter adjustment in the boundary area to be optimized can be achieved by changing the stiffness value and elastic modulus in the boundary area to be optimized to generate different second finite element models, so that multiple second finite element models can be generated based on the second connection relationship between the vehicle component and the vehicle. For example, the connector between the vehicle and the vehicle component can be replaced from a rigid unit Rbe2 to a flexible unit Rbe3-Cbush-Rbe3, and then the parameter adjustment can be achieved by adjusting the stiffness value of Cbush. Among them, a rubber strip is also provided between the vehicle component and the vehicle. When it is necessary to change the elastic modulus in the boundary area to be optimized, it can be achieved by adjusting the elastic modulus of the rubber strip in the boundary area to be optimized.

[0046] A plurality of second modal analysis files can be obtained by performing simulation calculations based on the plurality of second finite element models.

[0047] Optionally, the embodiment can use Isight software to adjust the parameters and batch output the second finite element models with different parameters. After obtaining multiple second finite element models, the second finite element models can be submitted in batches for calculation and solution to obtain multiple second modal analysis files.

[0048] In some embodiments of the present invention, at least one of the stiffness value and the elastic modulus of the boundary area to be optimized is changed to generate multiple second finite element models, including: changing the stiffness value and the elastic modulus of the boundary area to be optimized, which can be: first optimizing the stiffness value of the boundary area, then optimizing the elastic modulus of the boundary area, and generating multiple second finite element models; or first optimizing the elastic modulus of the boundary area, then optimizing the stiffness value of the boundary area, and generating multiple second finite element models; or simultaneously optimizing the stiffness value and the elastic modulus of the boundary area, and generating multiple second finite element models.

[0049] Specifically, the stiffness value and elastic modulus of the boundary area to be optimized can be optimized in sequence or simultaneously. Of course, in some examples, only one of the stiffness value and elastic modulus in the influencing parameters can be optimized.

[0050] S50, performing modal benchmarking calculation according to the test result file, each second modal analysis file and the corresponding second finite element model to obtain optimized modal frequency error and optimized vibration shape similarity, and determining assembly boundary influencing parameters that meet preset conditions according to the optimized modal frequency error and optimized vibration shape similarity.

[0051] Specifically, after obtaining multiple second finite element models after parameter adjustment, calculations can be performed to obtain multiple second modal analysis files, and then modal benchmarking calculations are re-performed based on the test result file, each second modal analysis file, and the corresponding second finite element model. It can be understood that the benchmarking calculation can refer to the specific description of the modal benchmarking calculation of the first finite element model mentioned above, which will not be repeated here. It should be noted that after the benchmarking calculation, the modal frequency error and vibration shape similarity between the second finite element model and the test result file can be obtained.

[0052] Specifically, after obtaining the optimized modal frequency error and the optimized vibration mode similarity, it can be determined whether they meet the preset conditions, which can be: the modal frequency error is less than the preset frequency error and the vibration mode similarity is greater than the preset similarity. That is to say, in the case where the modal frequency error is less than the first preset frequency, such as 5%, and the vibration mode similarity is greater than the preset similarity, such as 0.7, the corresponding second finite element model meets the requirements, and the parameters corresponding to the second finite element model that meets the preset conditions can be determined as the assembly boundary influence parameters of the vehicle component. A rubber strip is also provided between the vehicle component and the vehicle. As mentioned above, the assembly boundary influence parameters include the stiffness value of the elastic unit and the elastic modulus of the rubber strip.

[0053] Specifically, different vehicle components have different requirements for stiffness values ​​and elastic moduli, that is, different requirements for influencing parameters. For example, the assembly boundary of the door requires the mode similarity (MAC value) to be set to be greater than 0.5, preferably between 0.5-0.6, and the front panel steel plate requires the mode similarity (MAC value) to be set to be greater than 0.7, preferably between 0.7-0.8. Therefore, when setting the preset conditions, they can be determined according to the type of vehicle components.

[0054] In one embodiment of the present invention, when the boundary area does not meet the preset conditions, the assembly boundary influence parameters of the boundary area to be optimized are readjusted and the modal alignment calculation is performed until the boundary area meets the preset conditions.

[0055] Specifically, if after an influencing parameter optimization, the modal frequency errors and vibration mode similarities in the obtained multiple second finite element models do not meet the preset conditions, the assembly boundary influencing parameters of the boundary area to be optimized can be readjusted to obtain another finite element model. For example, multiple second finite element models can be obtained, and then the above-mentioned benchmarking calculation is repeated until a second finite element model in which the boundary area meets the preset conditions is obtained.

[0056] The embodiment is described by taking the front wall steel plate as an example of a vehicle component. Specifically, first, the test result file of the front wall steel plate on the rigid wall passenger compartment is obtained by testing, and the 3D geometric model of the front wall steel plate and the rigid wall passenger compartment is obtained at the same time. Then, the 3D geometric model is pre-processed for modeling, and then the assembly relationship between the front wall steel plate and the rigid wall passenger compartment is established. The bolt assembly stiffness is simulated by Rbe2 unit, and the gap sealing strip and others between adjacent bolts are simulated by the sealant modeling method. A complete first finite element model that can be used for analysis and calculation is established, and then the calculation is submitted to obtain the first modal analysis file. According to the comparison between the first modal frequency and the test modal frequency and the first modal vibration mode and the test modal vibration mode, it is determined that there is a boundary area with too high stiffness in the first finite element model, and it is determined as a boundary area to be optimized. The Rbe2 unit in the area is corrected to the Rbe3-Cbush-Rbe3 unit, that is, the rigid connection unit in the area is corrected to the elastic connection unit. The elastic modulus of the rubber strip in the area and the stiffness value of Cbush are marked as the parameters to be adjusted. The parameters to be adjusted are adjusted using the Isight software, and the second finite element model under different parameters is calculated and the finite element model is calculated to obtain the second modal analysis file. The frequency error and mode similarity of the two are obtained again using the benchmarking software until the frequency error is less than 5% and the mode similarity reaches the corresponding target value, and finally the stiffness value of Cbush and the equivalent elastic modulus of the sealant are determined.

[0057] The equivalent simulation method of the assembly boundary of a vehicle component of the embodiment of the present invention first performs a modal test on the vehicle component to generate a test result file, then obtains a first modal analysis file according to the first connection relationship between the vehicle component and the vehicle, determines the boundary area to be optimized according to the test result file and the first modal analysis file, adjusts the connection relationship between the vehicle component and the vehicle in the boundary area to be optimized from a rigid connection to a connection through an elastic unit to form a second connection relationship between the vehicle component and the vehicle, generates multiple second finite element models based on the second connection relationship, and performs simulation calculations based on the multiple second finite element models to obtain multiple second modal analysis files, performs modal benchmarking calculations according to the test result file, the second modal analysis file and the second finite element model to obtain optimized modal frequency error and optimized vibration shape similarity, and determines the assembly boundary influencing parameters when the optimized modal frequency error and the optimized vibration shape similarity meet the preset conditions. Therefore, the equivalent simulation method of the assembly boundary of the vehicle component of the embodiment can reduce the difficulty of equivalent simulation, and can accurately simulate the influencing parameters of the assembly boundary of the vehicle component, provide reference data for the assembly of the vehicle component, thereby improving the assembly force accuracy of the vehicle component, and better guiding the body design.

[0058] In summary, the equivalent simulation method of the vehicle component assembly boundary of the embodiment of the present invention can reduce the difficulty of equivalent simulation, and can accurately simulate the influencing parameters of the vehicle component assembly boundary, provide reference data for the assembly of vehicle components, thereby improving the assembly force accuracy of vehicle components, better guiding vehicle body design, reducing in-vehicle noise, and improving user experience.

[0059] Furthermore, the present invention proposes a computer-readable storage medium on which an equivalent simulation program for assembly boundaries of vehicle components is stored. When the simulation program is executed by a processor, the equivalent simulation method for assembly boundaries of vehicle components according to the above embodiment is implemented.

[0060] The computer-readable storage medium of the embodiment of the present invention can reduce the difficulty of equivalent simulation through the equivalent simulation program of the vehicle component assembly boundary in the above embodiment, and can accurately simulate the influencing parameters of the vehicle component assembly boundary, provide reference data for the assembly of vehicle components, thereby improving the accuracy of the assembly force of vehicle components, better guiding the body design, reducing the noise inside the vehicle, and improving the user experience.

[0061] For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use with or in conjunction with an instruction execution system, device or apparatus. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and editable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, a computer-readable medium may even be paper or other suitable medium on which the program may be printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0062] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0066] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situation.

[0067] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An equivalent simulation method for vehicle component assembly boundaries, It is characterized in that include: Obtaining the test modal vibration shape and test modal frequency of the vehicle component in the modal test, and generating a test result file; Based on a first connection relationship between a vehicle component and a vehicle, a first finite element model is established, and based on the first finite element model, an assembly boundary influence parameter of the vehicle component is simulated and calculated to obtain a first modal analysis file, wherein in the first connection relationship, the vehicle component is rigidly connected to the vehicle; Determining a boundary region to be optimized of the vehicle component according to the test result file and the first modal analysis file; Based on a second connection relationship between the vehicle component and the vehicle, a plurality of second finite element models are generated, and simulation calculation is performed based on each of the second finite element models to obtain a plurality of second modal analysis files, wherein in the second connection relationship, the vehicle component within the boundary area to be optimized is connected to the vehicle via an elastic unit; Performing modal benchmarking calculation according to the test result file, each of the second modal analysis files, and the corresponding second finite element model to obtain modal frequency error and vibration shape similarity, and determining assembly boundary influencing parameters that meet preset conditions according to the optimized modal frequency error and the optimized vibration shape similarity; The preset condition is: the modal frequency error is less than the preset frequency error and the vibration shape similarity is greater than the preset similarity; A rubber strip is provided between the vehicle component and the vehicle, and the assembly boundary influence parameter includes: a stiffness value of the elastic unit and an elastic modulus of the rubber strip.

2. The equivalent simulation method of vehicle component assembly boundary according to claim 1, It is characterized in that The first modal analysis file includes a first modal vibration shape and a first modal frequency; Determining the boundary area to be optimized of the vehicle component according to the test result file and the first modal analysis file includes: When the first modal frequency is greater than the test modal frequency, determining that the vehicle component has a boundary region to be optimized; The first mode vibration shape is compared with the test mode vibration shape to determine the boundary area to be optimized.

3. The equivalent simulation method of vehicle component assembly boundary according to claim 1, It is characterized in that The generating a plurality of second finite element models based on the second connection relationship between the vehicle component and the vehicle comprises: At least one of the stiffness value and the elastic modulus of the boundary region to be optimized is changed to generate a plurality of second finite element models.

4. The equivalent simulation method of vehicle component assembly boundary according to claim 3, It is characterized in that A rubber strip is provided between the vehicle component and the vehicle, changing the stiffness value of the boundary area to be optimized is changing the stiffness value of the elastic unit, and changing the elastic modulus of the boundary area to be optimized is changing the elastic modulus of the rubber strip.

5. The equivalent simulation method of vehicle component assembly boundary according to claim 1, It is characterized in that Obtaining a test modal vibration shape and a test modal frequency of the vehicle component in a modal test, including: The vehicle component is controlled to perform a modal test within a first preset frequency, and the test modal vibration shape and the test modal frequency are obtained to generate the test result file.

6. The equivalent simulation method for the assembly boundary of vehicle parts according to any one of claims 1 to 5, It is characterized in that The vehicle component is a vehicle component whose assembly force is uncontrollable.

7. The equivalent simulation method of vehicle component assembly boundary according to claim 6, It is characterized in that The vehicle component is a front steel plate.

8. A computer-readable storage medium, It is characterized in that An equivalent simulation program for the assembly boundary of vehicle components is stored thereon, and when the simulation program is executed by a processor, an equivalent simulation method for the assembly boundary of vehicle components according to any one of claims 1-7 is implemented.

Images