Vehicle seat analysis method and device, electronic equipment and storage medium

Abstract

The invention provides a vehicle seat analysis method and device, electronic equipment and a storage medium. The method comprises the steps that a first seat finite element model of a vehicle seat is established; inputting the excitation load into the first virtual excitation point, and obtaining first vibration information generated by the first virtual response point; obtaining a first vibration transmissibility of the first seat finite element model according to the first vibration information; a vehicle body floor is established, the vehicle body floor and the first seat finite element model are elastically connected, and a second seat finite element model is obtained; inputting the excitation load into a second virtual excitation point, and obtaining second vibration information generated by a second virtual response point; obtaining a second vibration transmissibility of the second seat finite element model according to the second vibration information; and obtaining a vibration comfort analysis result according to the first vibration transmissibility and the second vibration transmissibility. The vibration comfort of the vehicle seat can be accurately analyzed, and the vibration analysis cost of the vehicle seat can be reduced.

Description

Technical Field

[0001] The present application relates to the field of vibration detection, and in particular to a vehicle seat analysis method, device, electronic device and storage medium. Background Art

[0002] As the road conditions on which cars travel are generally bad, drivers and passengers have to withstand vibrations transmitted from the engine and other structures, as well as the excitation from uneven roads (mainly low-frequency vibrations). The seat is a structure that is in direct contact with the driver and passengers, and is the last link in reducing the vibration transmitted to the human body, and is an important factor affecting the riding comfort of the driver and passengers.

[0003] In the related art, the vibration test of the car seat is only to determine whether the seat meets the vibration comfort requirements by combining simple seat vibration data with human subjective feelings. The anti-seismic performance of the seat is not tested, resulting in inaccurate vibration test results of the car seat. Summary of the invention

[0004] In view of this, the present application provides a vehicle seat analysis method, device, electronic device and storage medium, which can accurately analyze the vibration comfort of the vehicle seat and reduce the vibration analysis cost of the vehicle seat.

[0005] A first aspect of an embodiment of the present application provides a vehicle seat analysis method, comprising: establishing corresponding component finite element models for multiple components of a vehicle seat structure of a vehicle; combining the finite element models of the multiple components into a vehicle seat finite element model according to the assembly relationship of the multiple components; determining in the vehicle seat structure an excitation attachment point for receiving an excitation load and an excitation response point for obtaining an excitation response; determining in the vehicle seat finite element model virtual excitation attachment points corresponding to the excitation attachment points in the vehicle seat structure and virtual excitation response points corresponding to the excitation response points; inputting the excitation load into the virtual excitation attachment points in the vehicle seat finite element model, obtaining vibration information generated by the virtual response points, and simulating response information generated by vehicle seat vibration based on the vibration information generated by the virtual response points.

[0006] Compared with the related art, the embodiment of the present application has at least the following advantages: by establishing the first seat finite element model of the vehicle seat, after determining the excitation point and the response point of the vehicle seat, the first virtual excitation point corresponding to the excitation point and the first virtual response point corresponding to the response point can be determined. Then, by inputting the excitation load into the first virtual excitation point, the first vibration information generated by the first virtual response point can be obtained, so that the frequency response analysis of the first seat finite element model can be performed based on the first vibration information, and then the first vibration transmission rate of the first seat finite element model can be obtained. Similarly, after the vehicle body floor and the first seat finite element model are set as an elastic connection to obtain the second seat finite element model, the second vibration transmission rate of the second seat finite element model can be obtained in the same manner as above. Since the vibration transmission rate can reflect the vibration isolation of the vehicle seat, the change of the vibration isolation of the vehicle seat after changing the connection mode between the vehicle body floor and the first seat finite element model can be known according to the first vibration transmission rate and the second vibration transmission rate, so as to obtain the vibration comfort analysis result of the vehicle seat and realize the vibration analysis of the vehicle seat. Through the above method, on the one hand, only the first seat finite element model and the second seat finite element model need to be established to realize the vibration analysis of the vehicle seat, which reduces the vibration analysis cost of the vehicle seat; on the other hand, this method does not need to be carried out in the laboratory, avoiding the interference of the test environment on the natural frequency of the vehicle seat, and improving the accuracy of the vibration analysis of the vehicle seat.

[0007] In some possible implementations, before inputting the excitation load into the first virtual excitation point, it also includes: obtaining setting parameters of the excitation load, wherein the setting parameters include an initial frequency, a frequency increment, and a frequency increment quantity; inputting the excitation load into the first virtual excitation point to obtain first vibration information generated by the first virtual response point includes: inputting the excitation load into the first virtual excitation point, dynamically adjusting the frequency of the excitation load according to the setting parameters, and obtaining the first vibration information; inputting the excitation load into the second virtual excitation point to obtain second vibration information generated by the second virtual response point includes: inputting the excitation load into the second virtual excitation point, dynamically adjusting the frequency of the excitation load according to the setting parameters, and obtaining the second vibration information.

[0008] In some possible implementations, the method for acquiring the excitation load includes: acquiring a unit excitation load; and respectively setting excitation forces of the unit excitation load in the X direction, the Y direction, and the Z direction to obtain the excitation load.

[0009] In some possible implementations, performing frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transmissibility of the first seat finite element model includes: obtaining a first frequency response function analysis file of the first seat finite element model according to the first vibration information; parsing the first frequency response function analysis file to obtain a first simulation curve of the first virtual response point, wherein the first simulation curve is a relationship curve between the frequency and vibration acceleration of the first virtual response point in the Z direction; obtaining the first vibration transmissibility according to the first simulation curve; performing frequency response analysis on the second seat finite element model according to the second vibration information to obtain a second vibration transmissibility of the second seat finite element model includes: obtaining a second frequency response function analysis file of the second seat finite element model according to the second vibration information; parsing the second frequency response function analysis file to obtain a second simulation curve of the second virtual response point, wherein the second simulation curve is a relationship curve between the frequency and vibration acceleration of the second virtual response point in the Z direction; obtaining the second vibration transmissibility according to the second simulation curve.

[0010] In some possible implementations, the first seat finite element model includes a lower slide rail finite element model; setting the vehicle body floor and the first seat finite element model as an elastic connection includes: setting a plurality of spring units between the vehicle body floor and the lower slide rail finite element model; calculating the first stiffness of the spring unit in the Z direction, the second stiffness in the Y direction, and the third stiffness in the X direction; and configuring each of the spring units according to the first stiffness, the second stiffness, and the third stiffness.

[0011] In some possible implementations, after establishing the first seat finite element model of the vehicle seat, it also includes: setting the counterweight mass of the first seat finite element model to be equal to the actual weight of the vehicle seat; calculating the first stiffness of the spring unit in the Z direction, the second stiffness in the Y direction, and the third stiffness in the X direction, including: calculating the supporting force provided by the vehicle body floor to the lower slide rail finite element model according to the counterweight weight; calculating the first stiffness according to the supporting force; calculating the friction force between the vehicle body floor and the lower slide rail finite element model according to the pressure exerted by the lower slide rail finite element model on the vehicle body floor; and calculating the second stiffness and the third stiffness according to the friction force.

[0012] In some possible implementations, obtaining the vibration comfort analysis result of the vehicle seat based on the first vibration transfer rate and the second vibration transfer rate includes comparing the first vibration transfer rate and the second vibration transfer rate; when the comparison result is that the first vibration transfer rate is greater than the second vibration transfer rate, obtaining the vibration comfort of the target vehicle seat is better than the vibration comfort analysis result of the vehicle seat, wherein the target vehicle seat is the seat corresponding to the finite element model of the second seat; when the comparison result is that the first vibration transfer rate is less than the second vibration transfer rate, obtaining the vibration comfort of the vehicle seat is better than the vibration comfort analysis result of the target vehicle seat.

[0013] The second aspect of the present application discloses a vehicle seat analysis device, including: a finite element model building module, an excitation point and response point determination module, a vibration information acquisition module, a frequency response analysis module and a vibration comfort analysis module; the finite element model building module is used to establish a first seat finite element model of a vehicle seat; the excitation point and response point determination module is used to determine the excitation point and response point of the vehicle seat, and determine a first virtual excitation point corresponding to the excitation point and a first virtual response point corresponding to the response point in the first seat finite element model; the vibration information acquisition module is used to input the excitation load into the first virtual excitation point to obtain the first vibration information generated by the first virtual response point; the frequency response analysis module is used to perform frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transfer rate of the first seat finite element model ; The finite element model establishment module is also used to establish a vehicle body floor, and set the vehicle body floor and the first seat finite element model as an elastic connection to obtain a second seat finite element model; the excitation point and response point determination module is also used to determine a second virtual excitation point corresponding to the excitation point, and a second virtual response point corresponding to the response point in the second seat finite element model; the vibration information acquisition module is also used to input the excitation load into the second virtual excitation point to obtain the second vibration information generated by the second virtual response point; the frequency response analysis module is also used to perform frequency response analysis on the second seat finite element model according to the second vibration information to obtain the second vibration transmission rate of the second seat finite element model; the vibration comfort analysis module is used to obtain the vibration comfort analysis result of the vehicle seat according to the first vibration transmission rate and the second vibration transmission rate.

[0014] The third aspect of the present application discloses an electronic device, which includes a processor and a memory, wherein the memory is used to store instructions, and the processor is used to call the instructions in the memory so that the electronic device executes the above-mentioned vehicle seat analysis method.

[0015] The fourth aspect of the present application discloses a storage medium, including computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned vehicle seat analysis method.

[0016] It can be understood that the vehicle seat analysis device of the second aspect, the electronic device of the third aspect and the storage medium of the fourth aspect provided above all correspond to the method of the first aspect. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flowchart of a vehicle seat analysis method according to an embodiment of the present application.

[0018] Figure 2 It is a simulation schematic diagram of a first seat finite element model according to an embodiment of the present application.

[0019] Figure 3 It is a connection diagram between the lower slide rail finite element model and the vehicle body floor in the second seat finite element model according to an embodiment of the present application.

[0020] Figure 4 It is a schematic diagram of a first simulation curve and a second simulation curve according to an embodiment of the present application.

[0021] Figure 5 It is a schematic diagram of the functional modules of a vehicle seat analysis device according to an embodiment of the present application.

[0022] Figure 6 It is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the implementation methods of the present application and the features in the implementation methods can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present application. The described implementations are only part of the implementations of the present application, rather than all the implementations.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0026] It should be further noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0027] In this application, "at least one" means one or more, and "more" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0028] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way.

[0029] Please refer to Figure 1 , Figure 1 This is a flowchart of the steps of an embodiment of the vehicle seat analysis method of the present application. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted. The vehicle seat analysis method can be executed by a vehicle seat analysis device provided in an embodiment of the present application. The vehicle seat analysis device can be implemented in software and / or hardware. The vehicle seat analysis device can specifically be simulation software and algorithms based on computers, virtual reality (VR) equipment, sensors and measuring equipment, etc., but is not limited to this. The embodiments of the present application are not limited to this.

[0030] The specific process of this embodiment is as follows Figure 1 As shown, the following steps are included: Step 101: Establish a first seat finite element model of a vehicle seat.

[0031] In some embodiments, the weight of the first seat finite element model is set to be equal to the actual weight of the vehicle seat. Specifically, the first seat finite element model can be established in the following manner: 1. Import the stp file of the vehicle seat into the finite element analysis software. The seat model of the vehicle seat will be displayed in the finite element analysis software. Extract the faces of the seat model, clean up the geometry, and create finite element meshes for each component of the vehicle seat. Draw a quadrilateral for the skeleton, a tetrahedral mesh for the slide motor mounting bracket, and a hexahedral mesh for the recliner drive shaft.

[0032] 2. For the vehicle seat that can be adjusted in eight directions, the connection between the ball bearing and the upper and lower slide rails, the inner and outer plates of the recliner, the front and rear connecting shafts, the left and right height adjustment brackets and the rear cross tube are all simulated by spring units. It should be noted that in order to reproduce the actual vibration transmission of the real vehicle seat when receiving excitation, the finite element model of multiple components of the vehicle seat structure established in this embodiment should include all subsystems that are hard-connected to the vehicle seat, that is, directly bolted to the vehicle seat without rubber bushings.

[0033] 3. The weld position and length of the seat model should be consistent with the vehicle seat connection.

[0034] 4. According to the weight center of mass COG (X / Y / Z) = ((physical mass * physical mass center) - (simulation mass * simulation mass center)) / weight mass, check the mass center of mass of the backrest assembly and the seat cushion assembly. Specifically, according to the weight mass = physical mass - finite element mass, the mass of the backrest assembly and the seat cushion assembly are respectively allocated at the check mass center. After weighting, ensure that the mass center and mass of the seat model are consistent with the mass center and mass parameters of the vehicle seat.

[0035] 5. Constrain the six degrees of freedom of the four bolt connections between the lower slide rail and the body floor to obtain the first seat finite element model.

[0036] It is understandable that the above operations can be completed using finite element analysis software such as Ansa, ANSYS, ABAQUS, and Nastran.

[0037] Step 102, determining an excitation point and a response point of the vehicle seat, and determining a first virtual excitation point corresponding to the excitation point and a first virtual response point corresponding to the response point in a first seat finite element model.

[0038] Specifically, the position of the first virtual excitation point in the first seat finite element model is consistent with the position of the excitation point in the vehicle seat; the position of the first virtual response point in the first seat finite element model is consistent with the position of the response point in the vehicle seat.

[0039] Please refer to Figure 2, which is a simulation schematic diagram of the first seat finite element model provided in the embodiment of the present application. Since the farther the distance between the first virtual response point and the mass center of the seat back is, the more obvious the vibration generated by the first virtual response point after the excitation load is input into the first virtual excitation point, the more accurate the analysis result of the subsequent frequency response analysis of the first seat finite element model based on the first vibration information is. Therefore, Figure 2 The first virtual excitation point and the first virtual response point are both set at a position of the seat back away from the center of mass of the seat back. It is understandable that this embodiment does not specifically limit the setting position of the first virtual excitation point, and it can be set according to actual needs.

[0040] Step 103: input the excitation load into the first virtual excitation point to obtain first vibration information generated by the first virtual response point.

[0041] In some embodiments, before inputting the excitation load into the first virtual excitation point, it also includes: obtaining setting parameters of the excitation load, wherein the setting parameters include an initial frequency, a frequency increment, and a frequency increment quantity; inputting the excitation load into the first virtual excitation point, and obtaining first vibration information generated by the first virtual response point, including: inputting the excitation load into the first virtual excitation point, dynamically adjusting the frequency of the excitation load according to the setting parameters, and obtaining the first vibration information.

[0042] Specifically, the initial frequency, frequency increment and the number of frequency increments of the excitation load are set in the finite element analysis software. This embodiment does not specifically limit the initial frequency, frequency increment and the number of frequency increments, and can be set according to actual needs.

[0043] In some embodiments, the first vibration information includes but is not limited to: the vibration acceleration of the first virtual response point and the vibration acceleration in the Z direction.

[0044] In some embodiments, the method for obtaining the excitation load includes: obtaining a unit excitation load; and respectively setting the excitation force of the unit excitation load in the X direction, the Y direction, and the Z direction to obtain the excitation load.

[0045] It is understandable that the present embodiment does not specifically limit the magnitudes of the excitation forces in the X-direction, the Y-direction, and the Z-direction, and can be set according to actual needs.

[0046] Step 104 : performing a frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transmissibility of the first seat finite element model.

[0047] In some embodiments, the first vibration transmissibility is obtained in the following manner: a first frequency response function analysis file of a first seat finite element model is obtained according to the first vibration information; the first frequency response function analysis file is parsed to obtain a first simulation curve of a first virtual response point, wherein the first simulation curve is a relationship curve between the frequency and the vibration acceleration of the first virtual response point in the Z direction; and the first vibration transmissibility is obtained according to the first simulation curve.

[0048] Specifically, the first vibration transmissibility is the ratio of the vibration acceleration of the first virtual response point in the Z direction to the frequency. It is worth noting that the smaller the vibration transmissibility, the smaller the possibility of resonance between the vehicle seat and the vehicle body environment, which means that the vibration isolation and comfort of the vehicle seat are better.

[0049] It can be understood that how to obtain the first frequency response function analysis file and how to parse the first frequency response function analysis file are described in detail in subsequent embodiments, and will not be described again here to avoid repetition.

[0050] Step 105 , establishing a vehicle body floor, and setting an elastic connection between the vehicle body floor and the first seat finite element model to obtain a second seat finite element model.

[0051] In some embodiments, the first seat finite element model includes a lower slide rail finite element model; the vehicle body floor and the first seat finite element model are set as an elastic connection, including: setting multiple spring units between the vehicle body floor and the lower slide rail finite element model; calculating the first stiffness of the spring unit in the Z direction, the second stiffness in the Y direction, and the third stiffness in the X direction; configuring each spring unit according to the first stiffness, the second stiffness, and the third stiffness.

[0052] Specifically, the supporting force provided by the vehicle body floor to the finite element model of the lower slide rail is calculated according to the following formula: G=ma; wherein G is the supporting force, m is the counterweight of the finite element model of the first seat, and g is the acceleration of gravity.

[0053] The friction force between the vehicle body floor and the finite element model of the lower slide rail is calculated according to the following formula: f=μF n ; where f is the friction force, μ is the static friction coefficient, F n The pressure exerted on the vehicle body floor by the finite element model of the lower slide rail.

[0054] Please refer to Figure 3 , is a connection diagram between the lower slide rail finite element model and the vehicle body floor in the second seat finite element model provided in an embodiment of the present application. By setting a plurality of springs between the lower slide rail finite element model and the vehicle body floor, the vehicle body floor and the first seat finite element model can be set to be elastically connected.

[0055] Step 106: determining, in the second seat finite element model, a second virtual excitation point corresponding to the excitation point and a second virtual response point corresponding to the response point.

[0056] Specifically, the position of the second virtual excitation point in the second seat finite element model is consistent with the position of the excitation point in the vehicle seat; the position of the second virtual response point in the second seat finite element model is consistent with the position of the response point in the vehicle seat.

[0057] Step 107: input the excitation load into the second virtual excitation point to obtain second vibration information generated by the second virtual response point.

[0058] It can be seen from the above description that after the setting parameters of the excitation load are obtained, the excitation load is input into the second virtual excitation point, and the frequency of the excitation load is dynamically adjusted according to the setting parameters, so as to obtain the second vibration information.

[0059] Step 108 : performing a frequency response analysis on the second seat finite element model according to the second vibration information to obtain a second vibration transmissibility of the second seat finite element model.

[0060] In some embodiments, the second vibration transmissibility is obtained in the following manner: a second frequency response function analysis file of a second seat finite element model is obtained according to the second vibration information; the second frequency response function analysis file is parsed to obtain a second simulation curve of a second virtual response point, wherein the second simulation curve is a curve showing the relationship between the frequency and the vibration acceleration of the second virtual response point in the Z direction; and the second vibration transmissibility is obtained according to the two simulation curves.

[0061] It can be understood that how to obtain the second frequency response function analysis file and how to parse the second frequency response function analysis file are described in detail in subsequent embodiments, and will not be described again here to avoid repetition.

[0062] Step 109 , obtaining a vibration comfort analysis result of the vehicle seat according to the first vibration transmissibility and the second vibration transmissibility.

[0063] In some embodiments, the vibration comfort analysis results of the vehicle seat are obtained in the following manner: when the comparison result is that the first vibration transmissibility is greater than the second vibration transmissibility, the vibration comfort of the target vehicle seat is better than the vibration comfort analysis result of the vehicle seat, wherein the target vehicle seat is the seat corresponding to the finite element model of the second seat; when the comparison result is that the first vibration transmissibility is less than the second vibration transmissibility, the vibration comfort of the vehicle seat is better than the vibration comfort analysis result of the target vehicle seat.

[0064] Specifically, the smaller the vibration transmissibility, the smaller the possibility of resonance between the vehicle seat and the vehicle body environment, which means that the vibration isolation and comfort of the vehicle seat are better. Therefore, if the first vibration transmissibility is greater than the second vibration transmissibility, it means that the vibration isolation and comfort of the vehicle seat can be improved by setting an elastic connection between the vehicle body floor and the first seat finite element model. In other words, by analyzing the vibration transmissibility of the vehicle seat in this embodiment, the comfort of the vehicle seat can be evaluated, and it can be known how to improve the comfort of the vehicle seat. The entire analysis process only requires the help of finite element analysis software, which saves the equipment cost of the vehicle seat analysis, and does not rely on the finished product of the vehicle seat. The comfort of the vehicle seat can be evaluated during the design stage of the vehicle seat.

[0065] For ease of understanding, the following uses the finite element analysis software Ansa as an example, combined with Figure 4 How to obtain the vibration comfort analysis result of the vehicle seat in this embodiment is specifically described: 1. Import the stp file of the vehicle seat into the Ansa software to obtain the initial vehicle seat model.

[0066] 2. Assign materials and properties to the vehicle seat model, establish welds and bolt connections; perform center of mass verification, and assign mass weights to the backrest assembly and seat cushion assembly based on the actual measurement results of the vehicle seat; constrain the six degrees of freedom at the four bolt points connecting the lower slide rail of the vehicle seat model to the vehicle body to obtain the first seat finite element model.

[0067] 3. Based on the set excitation points and response points of the vehicle seat, a first virtual excitation point and a first virtual response point of the first seat finite element model are created in the Ansa software.

[0068] 4. Create a unit excitation load in the Ansa software, set the initial frequency, frequency increment, and the number of frequency increments. Specifically, the Ansa software includes multiple controls, such as the TABLED1 control, the FREQUI control, the DAREA control, and the RLOAD control. Create a unit excitation load through the TABLED1 control, create the initial frequency, frequency increment, and the number of frequency increments through the FREQUI control, create the excitation force of the unit excitation load in the X, Y, and Z directions through the DAREA control, create a loading step through the RLOAD control, and the RLOAD control references the control ID of the excitation point DAREA control, and also references the control ID of the TABLED1 control.

[0069] 5. Based on the above settings, the Ansa software simulates the finite element model of the first seat to obtain the PCH file of the finite element model of the first seat, which is the first frequency response function analysis file of the finite element model of the first seat.

[0070] 6. On the basis of the first seat finite element model, a body floor is established, and a point-to-point spring unit is established between the body floor and the lower slide rail to constrain the 6 degrees of freedom of the floor support surface and the 6 degrees of freedom of the 4 bolt mounting holes of the lower slide rail. The first stiffness of the spring unit in the Z direction, the second stiffness in the Y direction, and the third stiffness in the X direction are calculated by the above method; each spring unit is configured according to the first stiffness, the second stiffness, and the third stiffness to obtain the second seat finite element model.

[0071] 7. Obtain the PCH file of the second seat finite element model in the same manner as the first seat finite element model. The PCH file is the second frequency response function analysis file of the second seat finite element model.

[0072] 8. Open the first frequency response function analysis file and the second frequency response function analysis file with Hypergraph2D software to obtain Figure 4 The first simulation curve and the second simulation curve are shown. Figure 4 The curve corresponding to Model1 shown is the first simulation curve, and the curve corresponding to Model2 is the second simulation curve.

[0073] 9. Take the ratio of the vibration acceleration and frequency of the first virtual response point in the first simulation curve in the Z direction as the first vibration transmission rate, and take the ratio of the vibration acceleration and frequency of the second virtual response point in the second simulation curve in the Z direction as the second vibration transmission rate, and compare the first vibration transmission rate and the second vibration transmission rate.

[0074] 10. If the first vibration transmissibility is greater than the second vibration transmissibility, it indicates that changing the stiffness and damping between the vehicle seat and the vehicle floor can improve the vibration isolation and comfort of the vehicle seat. If the first vibration transmissibility is less than the second vibration transmissibility, it indicates that the vehicle seat is likely to resonate with the vehicle body environment, and the vibration isolation of the vehicle seat needs to be improved. It is necessary to improve the vibration isolation of the vehicle seat by increasing the damping of the vibration isolation system, softening the foam, and increasing the thickness of the foam.

[0075] Compared with the related art, the embodiment of the present application has at least the following advantages: by establishing the first seat finite element model of the vehicle seat, after determining the excitation point and the response point of the vehicle seat, the first virtual excitation point corresponding to the excitation point and the first virtual response point corresponding to the response point can be determined. Then, by inputting the excitation load into the first virtual excitation point, the first vibration information generated by the first virtual response point can be obtained, so that the frequency response analysis of the first seat finite element model can be performed based on the first vibration information, and then the first vibration transmission rate of the first seat finite element model can be obtained. Similarly, after the vehicle body floor and the first seat finite element model are set as an elastic connection to obtain the second seat finite element model, the second vibration transmission rate of the second seat finite element model can be obtained in the same manner as above. Since the vibration transmission rate can reflect the vibration isolation of the vehicle seat, the change of the vibration isolation of the vehicle seat after changing the connection mode between the vehicle body floor and the first seat finite element model can be known according to the first vibration transmission rate and the second vibration transmission rate, so as to obtain the vibration comfort analysis result of the vehicle seat and realize the vibration analysis of the vehicle seat. Through the above method, on the one hand, only the first seat finite element model and the second seat finite element model need to be established to realize the vibration analysis of the vehicle seat, which reduces the vibration analysis cost of the vehicle seat; on the other hand, this method does not need to be carried out in the laboratory, avoiding the interference of the test environment on the natural frequency of the vehicle seat, and improving the accuracy of the vibration analysis of the vehicle seat.

[0076] Based on the same idea as the vehicle seat analysis method in the above embodiment, the present application also provides a vehicle seat analysis device, which can be used to perform the above vehicle seat analysis method. For ease of explanation, the structural diagram of the vehicle seat analysis device embodiment only shows the parts related to the embodiment of the present application. It can be understood by those skilled in the art that the illustrated structure does not constitute a limitation on the device, and may include more or fewer components than shown in the diagram, or combine certain components, or arrange the components differently.

[0077] like Figure 5 As shown, the vehicle seat analysis device 100 includes a finite element model building module 11, an excitation point and response point determination module 12, a vibration information acquisition module 13, a frequency response analysis module 14, and a vibration comfort analysis module 15. In some embodiments, the above modules can be programmable software instructions stored in a memory and can be called and executed by a processor. It is understood that in other embodiments, the above modules can also be program instructions or firmware solidified in the processor.

[0078] A finite element model building module 11, used to build a first seat finite element model of a vehicle seat; an excitation point and response point determination module 12, used to determine an excitation point and a response point of the vehicle seat, and determine a first virtual excitation point corresponding to the excitation point and a first virtual response point corresponding to the response point in the first seat finite element model; A vibration information acquisition module 13, used to input an excitation load into the first virtual excitation point to acquire first vibration information generated by the first virtual response point; A frequency response analysis module 14, configured to perform a frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transmissibility of the first seat finite element model; The finite element model building module 11 is also used to build a vehicle body floor, and set an elastic connection between the vehicle body floor and the first seat finite element model to obtain a second seat finite element model; The excitation point and response point determination module 12 is further used to determine, in the second seat finite element model, a second virtual excitation point corresponding to the excitation point and a second virtual response point corresponding to the response point; the vibration information acquisition module 13 is further used to input the excitation load into the second virtual excitation point to obtain second vibration information generated by the second virtual response point; the frequency response analysis module 14 is further used to perform frequency response analysis on the second seat finite element model according to the second vibration information to obtain a second vibration transmissibility of the second seat finite element model; The vibration comfort analysis module 15 is used to obtain a vibration comfort analysis result of the vehicle seat according to the first vibration transmissibility and the second vibration transmissibility.

[0079] Please refer to Figure 6 , a schematic diagram of the hardware structure of the electronic device 1000 provided in the embodiment of the present application. Figure 6 As shown, the electronic device 1000 may include a processor 1001 and a memory 1002. The memory 1002 is used to store one or more computer programs 1003. The one or more computer programs 1003 are configured to be executed by the processor 1001. The one or more computer programs 1003 include instructions, and the above instructions can be used to implement the above vehicle seat analysis method in the electronic device 1000.

[0080] It is understandable that the structure shown in this embodiment does not constitute a specific limitation on the electronic device 1000. In other embodiments, the electronic device 1000 may include more or fewer components than shown, or combine or separate some components, or arrange the components differently.

[0081] The processor 1001 may include one or more processing units, for example, the processor 1001 may include an application processor (AP), a modem, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0082] The processor 1001 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 1001 is a cache memory. The memory may store instructions or data that the processor 1001 has just used or circulated. If the processor 1001 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 1001, and thus improves the efficiency of the system.

[0083] In some embodiments, the processor 1001 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM interface, and / or a USB interface, etc.

[0084] In some embodiments, processor 1001 is used to execute acceleration schemes such as single instruction multiple data (SIMD) and very long instruction word (VLIW).

[0085] In some embodiments, memory 1002 may include high-speed random access memory and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0086] This embodiment also provides a storage medium, in which computer instructions are stored. When the instructions are executed on an electronic device, the electronic device executes the above-mentioned related method steps to implement the vehicle seat analysis method in the above-mentioned embodiment.

[0087] Among them, the electronic device and storage medium provided in this embodiment are used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0088] In practical applications, the above functions can be distributed to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0089] In several embodiments provided in the present application, the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are schematic. For example, the division of the modules or units is a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0090] The unit described as a separate component may or may not be physically separated, and the component shown as a unit may be one physical unit or multiple physical units, that is, it may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

[0091] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0092] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or 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 to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

[0093] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A vehicle seat analysis method, characterized in that: include: Establishing a first seat finite element model of a vehicle seat; Determining an excitation point and a response point of the vehicle seat, and determining a first virtual excitation point corresponding to the excitation point and a first virtual response point corresponding to the response point in the first seat finite element model; Inputting the excitation load into the first virtual excitation point to obtain first vibration information generated by the first virtual response point; Performing frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transmissibility of the first seat finite element model; Establishing a vehicle body floor, and setting an elastic connection between the vehicle body floor and the first seat finite element model to obtain a second seat finite element model; Determining, in the second seat finite element model, a second virtual excitation point corresponding to the excitation point and a second virtual response point corresponding to the response point; Inputting the excitation load into the second virtual excitation point to obtain second vibration information generated by the second virtual response point; Performing a frequency response analysis on the second seat finite element model according to the second vibration information to obtain a second vibration transmissibility of the second seat finite element model; A vibration comfort analysis result of the vehicle seat is obtained according to the first vibration transmissibility and the second vibration transmissibility.

2. The vehicle seat analysis method according to claim 1, characterized in that: Before inputting the excitation load into the first virtual excitation point, the method further includes: Acquire setting parameters of the excitation load, wherein the setting parameters include an initial frequency, a frequency increment, and a frequency increment quantity; The step of inputting the excitation load into the first virtual excitation point to obtain the first vibration information generated by the first virtual response point includes: Inputting the excitation load into the first virtual excitation point, dynamically adjusting the frequency of the excitation load according to the setting parameters, and acquiring the first vibration information; The step of inputting the excitation load into the second virtual excitation point to obtain the second vibration information generated by the second virtual response point includes: The excitation load is input into the second virtual excitation point, and the frequency of the excitation load is dynamically adjusted according to the setting parameters to obtain the second vibration information.

3. The vehicle seat analysis method according to claim 1 or 2, characterized in that: The method for obtaining the excitation load includes: Get unit excitation load; The excitation force of the unit excitation load in the X direction, the Y direction and the Z direction is set respectively to obtain the excitation load.

4. The vehicle seat analysis method according to claim 1, characterized in that: The performing frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transmissibility of the first seat finite element model includes: Obtaining a first frequency response function analysis file of the first seat finite element model according to the first vibration information; Parsing the first frequency response function analysis file to obtain a first simulation curve of the first virtual response point, wherein the first simulation curve is a relationship curve between the frequency and the vibration acceleration of the first virtual response point in the Z direction; Obtaining the first vibration transmissibility according to the first simulation curve; The performing frequency response analysis on the second seat finite element model according to the second vibration information to obtain a second vibration transmissibility of the second seat finite element model includes: Obtaining a second frequency response function analysis file of the second seat finite element model according to the second vibration information; Parsing the second frequency response function analysis file to obtain a second simulation curve of the second virtual response point, wherein the second simulation curve is a relationship curve between the frequency and the vibration acceleration of the second virtual response point in the Z direction; The second vibration transmissibility is obtained according to the second simulation curve.

5. The vehicle seat analysis method according to claim 1, characterized in that: The first seat finite element model includes a lower slide rail finite element model; and setting an elastic connection between the vehicle body floor and the first seat finite element model includes: A plurality of spring units are arranged between the vehicle body floor and the lower slide rail finite element model; Calculating a first stiffness of the spring unit in the Z direction, a second stiffness in the Y direction, and a third stiffness in the X direction; Each of the spring units is configured according to the first stiffness, the second stiffness, and the third stiffness.

6. The vehicle seat analysis method according to claim 5, characterized in that: After establishing the first seat finite element model of the vehicle seat, it also includes: Setting the counterweight mass of the first seat finite element model to be equal to the actual weight of the vehicle seat; The calculating of the first stiffness of the spring unit in the Z direction, the second stiffness in the Y direction, and the third stiffness in the X direction includes: Calculating the supporting force provided by the vehicle body floor to the lower slide rail finite element model according to the weight of the counterweight; Calculating the first stiffness according to the supporting force; Calculating the friction between the vehicle body floor and the lower slide rail finite element model according to the pressure applied by the lower slide rail finite element model to the vehicle body floor; The second stiffness and the third stiffness are calculated according to the friction force.

7. The vehicle seat analysis method according to claim 1, characterized in that: The obtaining a vibration comfort analysis result of the vehicle seat according to the first vibration transmissibility and the second vibration transmissibility includes: comparing the first vibration transmissibility and the second vibration transmissibility; When the comparison result shows that the first vibration transmissibility is greater than the second vibration transmissibility, a vibration comfort analysis result is obtained that the vibration comfort of the target vehicle seat is better than that of the vehicle seat, wherein the target vehicle seat is a seat corresponding to the finite element model of the second seat; When the comparison result is that the first vibration transmissibility is less than the second vibration transmissibility, the vibration comfort analysis result that the vehicle seat has better vibration comfort than the target vehicle seat is obtained.

8. A vehicle seat analysis device, characterized in that: include: Finite element model building module, excitation point and response point determination module, vibration information acquisition module, frequency response analysis module and vibration comfort analysis module; The finite element model building module is used to build a first seat finite element model of the vehicle seat; The excitation point and response point determination module is used to determine the excitation point and response point of the vehicle seat, and determine a first virtual excitation point corresponding to the excitation point and a first virtual response point corresponding to the response point in the first seat finite element model; The vibration information acquisition module is used to input the excitation load into the first virtual excitation point to acquire the first vibration information generated by the first virtual response point; The frequency response analysis module is used to perform frequency response analysis on the first seat finite element model according to the first vibration information to obtain a first vibration transmissibility of the first seat finite element model; The finite element model building module is also used to build a vehicle body floor, and set an elastic connection between the vehicle body floor and the first seat finite element model to obtain a second seat finite element model; The excitation point and response point determination module is further used to determine a second virtual excitation point corresponding to the excitation point and a second virtual response point corresponding to the response point in the second seat finite element model; The vibration information acquisition module is further used to input the excitation load into the second virtual excitation point to acquire the second vibration information generated by the second virtual response point; The frequency response analysis module is further used to perform frequency response analysis on the second seat finite element model according to the second vibration information to obtain a second vibration transmissibility of the second seat finite element model; The vibration comfort analysis module is used to obtain a vibration comfort analysis result of the vehicle seat according to the first vibration transmissibility and the second vibration transmissibility.

9. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory is used to store instructions, and the processor is used to call the instructions in the memory, so that the electronic device executes the vehicle seat analysis method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The invention comprises computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the vehicle seat analysis method according to any one of claims 1 to 7.

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