Performance optimization method, device and equipment for hydraulic bushing and medium

Abstract

The invention relates to the field of vehicles, in particular to a performance optimization method, device, equipment and medium for a hydraulic bushing, and the method comprises the following steps: testing static and dynamic stiffness of the hydraulic bushing to correspondingly obtain a test reference curve; adjusting the nonlinear finite element analysis model of the hydraulic bushing by using the test reference curve to obtain an adjusted nonlinear finite element analysis model; determining a physical parameter predicted value in a preset performance analysis model under the feature structures by using the adjusted nonlinear finite element analysis model, and screening out a target feature structure of the hydraulic bushing from all the feature structures; according to the physical parameter prediction value of the target feature structure, a preset performance analysis model is adjusted, the adjusted preset performance analysis model is obtained, and therefore the specific structure of the hydraulic bushing is determined, the structure of the hydraulic bushing is subjected to optimization design through the adjusted preset performance analysis model, and the design efficiency of the hydraulic bushing is improved. And the characteristics of the hydraulic bushing can meet specified performance requirements.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a method, device, equipment and medium for optimizing the performance of a hydraulic bushing. Background Art

[0002] The hydraulic bushing has excellent dynamic characteristics, which is beneficial to improving the vehicle's handling stability and ride smoothness. As an important elastic connection element between the suspension control arm, subframe and body of the car, the hydraulic bushing is constantly subjected to the impact load transmitted to the suspension through the road surface and is in an alternating multi-axial stress state. Therefore, in the design of the hydraulic bushing, its characteristic structure is very important.

[0003] In the prior art, the dynamic characteristics of the hydraulic bushing are simulated and analyzed by using a lumped parameter model or a bond graph model to obtain the dynamic characteristic curve of the hydraulic bushing, thereby optimizing the characteristic structure of the hydraulic bushing according to the dynamic characteristic curve. However, the key physical parameters in the lumped parameter model and the bond graph model are mainly based on experimental tests or empirical values. Since the variables need to be strictly controlled during the test, the overall requirements for the test are high. Secondly, the empirical values ​​are not rigorous, which can easily cause a large difference between the obtained dynamic characteristic curve and the measured dynamic characteristic curve, especially in the medium and high frequency range, which makes the model limited to the structural design of the hydraulic bushing. Therefore, how to improve the accuracy of the lumped parameter model or the bond graph model of the hydraulic bushing to improve the performance of the hydraulic bushing has become an urgent problem to be solved. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a performance optimization method, device, equipment and medium for a hydraulic bushing to solve the problem that the performance of the designed hydraulic bushing does not meet the requirements due to the low accuracy of the lumped parameter model or the bond graph model.

[0005] In a first aspect, an embodiment of the present invention provides a performance optimization method for a hydraulic bushing, the performance optimization method comprising:

[0006] The static and dynamic stiffness of the hydraulic bushing is tested, and the corresponding test reference curve is obtained;

[0007] Acquire a nonlinear finite element analysis model of the hydraulic bushing, and adjust model parameters of the nonlinear finite element analysis model using the test reference curve to obtain an adjusted nonlinear finite element analysis model;

[0008] Acquire all characteristic structures of the hydraulic bushing, and for any characteristic structure, use the adjusted nonlinear finite element analysis model to determine the predicted value of the physical parameters in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model;

[0009] According to a preset target dynamic performance curve, N target characteristic structures of the hydraulic bushing are screened out from all characteristic structures, where N>2;

[0010] According to the predicted values ​​of the physical parameters of the preset performance analysis model under the N target characteristic structures and the test benchmark curve, the model parameters of the preset performance analysis model are adjusted to obtain an adjusted preset performance analysis model, and the specific structure of the hydraulic bushing is determined using the adjusted preset performance analysis model.

[0011] In a second aspect, an embodiment of the present invention provides a performance optimization device for a hydraulic bushing, the performance optimization device comprising:

[0012] The test module is used to test the static and dynamic stiffness of the hydraulic bushing and obtain the corresponding test reference curve;

[0013] A model calibration module, used for obtaining a nonlinear finite element analysis model of the hydraulic bushing, adjusting model parameters of the nonlinear finite element analysis model using the test reference curve, and obtaining an adjusted nonlinear finite element analysis model;

[0014] A model prediction module, used for obtaining all characteristic structures of the hydraulic bushing, and for any characteristic structure, using the adjusted nonlinear finite element analysis model to determine the predicted value of the physical parameters in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model;

[0015] A structure screening module, used for screening out N target characteristic structures of the hydraulic bushing from all characteristic structures according to a preset target dynamic performance curve, where N>2;

[0016] A structure determination module is used to adjust the model parameters of the preset performance analysis model according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures and the test benchmark curve to obtain an adjusted preset performance analysis model, and use the adjusted preset performance analysis model to determine the specific structure of the hydraulic bushing.

[0017] In a third aspect, an embodiment of the present invention provides a computer device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the performance optimization method as described in the first aspect when executing the computer program.

[0018] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the performance optimization method as described in the first aspect is implemented.

[0019] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0020] The present invention tests the static and dynamic stiffness of the hydraulic bushing and obtains a corresponding test benchmark curve; obtains a nonlinear finite element analysis model of the hydraulic bushing, and uses the test benchmark curve to adjust the model parameters of the nonlinear finite element analysis model to obtain an adjusted nonlinear finite element analysis model; obtains all characteristic structures of the hydraulic bushing, and for any characteristic structure, uses the adjusted nonlinear finite element analysis model to determine the physical parameter prediction values ​​in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model; according to the preset target dynamic performance curve, N target characteristic structures of the hydraulic bushing are screened out from all characteristic structures, where N>2; according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures, and the test benchmark curve, the model parameters of the preset performance analysis model are adjusted to obtain the adjusted preset performance analysis model, and the adjusted preset performance analysis model is used to determine the specific structure of the hydraulic bushing. Among them, the nonlinear finite element analysis model is used to preliminarily predict the relationship between each characteristic structure in the hydraulic bushing and the physical parameters in the preset performance analysis model, that is, to determine the physical parameter prediction value corresponding to each characteristic structure in the preset performance analysis model to clarify the meaning of each physical parameter prediction value, and then the target characteristic structure required for the hydraulic bushing is screened out according to the dynamic performance requirements, so that the accuracy of the preset performance analysis model is adjusted according to the physical parameter prediction values ​​of the preset performance analysis model under all target characteristic structures, thereby improving the accuracy of the performance analysis model, and then using the adjusted preset performance analysis model to optimize the structure of the hydraulic bushing, so that the characteristics of the hydraulic bushing can meet the specified performance requirements, optimize the design process of the hydraulic bushing, and improve the performance of the hydraulic bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of an application environment of a performance optimization method for a hydraulic bushing provided in Embodiment 1 of the present invention;

[0023] Figure 2 It is a schematic flow chart of a performance optimization method of a hydraulic bushing provided in Embodiment 1 of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a performance optimization device for a hydraulic bushing provided in Embodiment 2 of the present invention;

[0025] Figure 4 It is a structural diagram of a computer device provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0026] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0027] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0028] It should also be understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0029] As used in the present specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]", depending on the context.

[0030] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0031] References to "one embodiment" or "some embodiments" etc. described in the present specification mean that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0032] It should be understood that the order of execution of the steps in the following embodiments does not imply a precedence of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0033] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0034] A performance optimization method for a hydraulic bushing provided in the first embodiment of the present invention can be applied in the following aspects: Figure 1 In an application environment, the client communicates with the server. The client includes but is not limited to PDAs, desktop computers, laptops, ultra-mobile personal computers (UMPCs), netbooks, cloud terminal devices, personal digital assistants (PDAs) and other computer devices. The server can be an independent server or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms.

[0035] See also Figure 2 , is a flow chart of a method for optimizing the performance of a hydraulic bushing provided in the first embodiment of the present invention. The method for optimizing the performance of a hydraulic bushing can be applied to Figure 1 The client in the client, the computer device corresponding to the client connects to the server to obtain the corresponding background data. For example, the nonlinear finite element analysis model of the hydraulic bushing and all the characteristic structures of the hydraulic bushing, etc., are used for the subsequent structural design of the hydraulic bushing.

[0036] like Figure 2 As shown, the performance optimization method may include the following steps:

[0037] Step S201, testing the static and dynamic stiffness of the hydraulic bushing to obtain a corresponding test reference curve.

[0038] Among them, testing the static and dynamic stiffness of the hydraulic bushing refers to performing a static stiffness test and a dynamic stiffness test on the hydraulic bushing respectively. Correspondingly, the test reference curve includes a basic curve corresponding to the static stiffness test and a reference curve corresponding to the dynamic stiffness test. Therefore, in the present invention, the static stiffness test and the dynamic stiffness test are performed on the hydraulic bushing respectively, and the reference curves of the static stiffness test and the dynamic stiffness test are obtained accordingly.

[0039] In an embodiment of the present invention, the static stiffness test of the hydraulic bushing is specifically as follows: the hydraulic bushing is fixed on a test bench, a linear load is applied, and a first reference curve between the output force and the displacement is obtained. The slope of the first reference curve is the static stiffness of the hydraulic bushing.

[0040] The dynamic stiffness test of hydraulic bushing is as follows: fix one end of the hydraulic bushing and connect the other end to the action end of the test bench, apply sinusoidal displacement signal excitation to the action end, output the second reference curve between displacement excitation and force response, and the slope of the second reference curve is the dynamic stiffness of the hydraulic bushing. It is worth noting that the dynamic stiffness test needs to ensure that the amplitude of different displacement signals is more than 3 groups, the test frequency is more than 4 groups under each amplitude, and the frequency range is between 0Hz-150Hz.

[0041] Step S202, obtaining a nonlinear finite element analysis model of the hydraulic bushing, adjusting model parameters of the nonlinear finite element analysis model using a test reference curve, and obtaining an adjusted nonlinear finite element analysis model.

[0042] Among them, the nonlinear finite element analysis model of the hydraulic bushing is used to simulate and analyze the static and dynamic characteristics of the hydraulic bushing. The adjusted nonlinear finite element analysis model refers to a nonlinear finite element analysis model that already has the ability to accurately simulate and analyze the hydraulic bushing, and can accurately analyze its static and dynamic characteristics when faced with new data. Therefore, in the present invention, the nonlinear finite element analysis model of the hydraulic bushing is obtained, and the model parameters of the nonlinear finite element analysis model are adjusted using the experimental reference curve to improve the model accuracy of the nonlinear finite element analysis model, thereby obtaining the adjusted nonlinear finite element analysis model.

[0043] Optionally, the nonlinear finite element analysis model of the hydraulic bushing includes a liquid model and a solid model, and the step of obtaining the nonlinear finite element analysis model of the hydraulic bushing includes:

[0044] Obtaining a first dynamic equation corresponding to the liquid model and a second dynamic equation corresponding to the solid model, substituting the preset kinematic conditions and dynamic conditions on the solid-liquid coupling boundary into the first dynamic equation and the second dynamic equation, and obtaining a finite element equation of the solid-liquid coupling system of the hydraulic bushing;

[0045] Solving the finite element equation of the solid-liquid coupling system, obtaining the stress residual of the liquid on the solid on the solid-liquid coupling boundary of the hydraulic bushing and the displacement residual of the liquid on the solid-liquid coupling boundary, and judging whether the stress residual and the displacement residual meet the preset convergence condition;

[0046] When it is determined that the condition is not satisfied, the parameters of the finite element equation of the solid-liquid coupling system are adjusted until the stress residual and the displacement residual both satisfy the convergence condition, and an adjusted finite element equation of the solid-liquid coupling system is obtained, and the adjusted finite element equation of the solid-liquid coupling system is confirmed to be a nonlinear finite element analysis model of the hydraulic bushing.

[0047] In the embodiment of the present invention, the nonlinear finite element analysis model of the hydraulic bushing includes a liquid model and a solid model, wherein the solid model refers to the mathematical model of the rubber structure corresponding to the rubber main spring in the hydraulic bushing. When describing the dynamic equation of the elastic structure, the Lagrangian description is usually used, that is, the Lagrangian coordinates X and time t are used as independent coordinates to describe the movement and deformation of the object. When describing the dynamic equation of the liquid, the Eulerian coordinates X and time t are usually used as independent coordinates to describe the movement and deformation of the material, that is, the Eulerian description is used. If the motion grid coordinates X that are independent of the actual configuration are taken m and time t as independent variables to describe the movement and deformation of the material, that is, ALE description. ALE description is often associated with large material deformation. When the material deformation reaches a certain degree, the mesh used for the original analysis is distorted, and it is required to modify the mesh. Preferably, in the embodiment of the present invention, the solid uses an 8-node hexahedral unit and the liquid uses a 4-node tetrahedral unit.

[0048] The first kinetic equation corresponding to the liquid model under ALE description includes: continuity equation and momentum equation, where the expression of the continuity equation is: The momentum equation is expressed as:

[0049]

[0050] In the above formula, u i is the velocity component in direction i, f i is the body force component, ρ is the liquid density, u mj The velocity at any specified liquid grid point, τ ijis the stress tensor of the fluid, i represents direction i, and j represents direction j.

[0051] Wherein, the stress tensor τ of the fluid ij The calculation expression is:

[0052]

[0053] Among them, u j is the velocity component in direction j, p is the pressure, μ is the dynamic viscosity coefficient, when i and j are equal, δ ij is 1, when i and j are not equal, δ ij is 0.

[0054] The second kinetic equation corresponding to the solid model under Lagrangian description is:

[0055]

[0056] Among them, τ ij is the ijth order component of the Cauchy stress tensor, is the physical force, ρ s is the density of the solid, is the acceleration component of the solid particle in the i direction.

[0057] In the structure of hydraulic bushing, the rubber main spring is made of rubber material. The basic method to describe the mechanical properties of rubber materials is to determine the stress-strain properties under certain simple deformation modes through experiments, and then obtain the stress-strain data fitting with an appropriate strain energy function through regression analysis, and use the relevant parameters obtained by fitting as the input of finite element analysis to predict the load-deformation performance of the rubber component to be designed. For incompressible rubber materials, the calculation formula for the engineering stress corresponding to the strain energy function U is:

[0058]

[0059] Among them, γ U , γ B and γ P are the stretching ratios of the tested uniaxial stretching, equal biaxial stretching and plane shear, I 1 represents the first-order strain invariant, I 2 represents the second-order strain invariant.

[0060] In the embodiment of the present invention, the preset kinematic conditions and dynamic conditions on the solid-liquid coupling boundary are:

[0061]

[0062]

[0063] in, represents the boundary displacement of the liquid, represents the boundary displacement of the solid, represents the boundary stress of the liquid, is the boundary stress of the solid, and s and f below represent the solid and liquid respectively. represents the normal on the coupled boundary.

[0064] Liquid velocity on the solid-liquid coupling boundary It can be obtained from the following kinematic conditions:

[0065]

[0066] On the solid-liquid coupling boundary, the force exerted by the liquid on the solid is:

[0067]

[0068] in, is the displacement of the solid on the solid-liquid coupling boundary.

[0069] The first dynamic equation corresponding to the liquid model and the second dynamic equation corresponding to the solid model are discretized in space, and the kinematic conditions and dynamic conditions on the preset solid-liquid coupling boundary are introduced to obtain the finite element equation of the solid-liquid coupling system of the hydraulic bushing, which is expressed as follows:

[0070]

[0071] in, is the vector composed of the velocity vector of the node and the pressure vector of the unit in the liquid model. is the vector composed of the displacement vectors of the nodes in the solid model, is the finite element equation corresponding to the first dynamic equation of the liquid model, is the finite element equation corresponding to the second dynamic equation of the solid model.

[0072] The finite element equations of the solid-liquid coupling system of the hydraulic bushing are solved using an iterative algorithm. In the iterative algorithm, the finite element equations of the liquid and the solid are solved separately. The specific solution process of the finite element equations of the solid-liquid coupling system is:

[0073] First, after the displacement relaxation factor is introduced into the finite element equation corresponding to the liquid model, the finite element equation of the liquid is calculated to obtain the stress residual of the liquid on the solid-liquid coupling boundary of the hydraulic bushing. The expression of the finite element equation corresponding to the liquid model after the displacement relaxation factor is introduced is:

[0074]

[0075] Among them, the displacement of the solid on the solid-liquid coupling boundary during the k-step iteration is calculated from its displacement in the k-1 and k-2 steps, α d is the displacement relaxation factor, 0<α d ≤1.

[0076] After introducing the stress relaxation factor into the finite element equation corresponding to the solid model, the solid finite element equation is calculated to obtain the displacement residual of the liquid on the solid-liquid coupling boundary of the hydraulic bushing. The expression of the finite element equation corresponding to the solid model after introducing the stress relaxation factor is:

[0077]

[0078] Among them, during the k-step iteration, the stress of the liquid on the solid at the solid-liquid coupling boundary is obtained by calculating the stress in the k-1th step, α l is the stress relaxation factor, 0<α l ≤1.

[0079] Then, detect whether the stress residual is greater than the stress residual threshold, and detect whether the displacement residual is greater than the displacement residual threshold. If the stress residual is greater than the stress residual threshold, and the displacement residual is greater than the displacement residual threshold, adjust the values ​​of the stress relaxation factor and the displacement relaxation factor in the finite element equation of the solid-liquid coupling system until the stress residual is not greater than the stress residual threshold, and the displacement residual is not greater than the displacement residual threshold, to obtain the adjusted finite element equation of the solid-liquid coupling system, wherein the stress residual threshold and the displacement residual threshold can be set to 0.01, which is not required by the present invention.

[0080] In the embodiment of the present invention, the adjusted solid-liquid coupling system finite element equation is obtained by adjusting the values ​​of the stress relaxation factor and the displacement relaxation factor, and the adjusted solid-liquid coupling system finite element equation is used as a nonlinear finite element analysis model of the hydraulic bushing.

[0081] Optionally, the step of adjusting parameters of the nonlinear finite element analysis model using the test reference curve to obtain an adjusted nonlinear finite element analysis model includes:

[0082] Using the nonlinear finite element analysis model to simulate and analyze the static and dynamic characteristics of the hydraulic bushing, and obtain a simulation characteristic curve of the hydraulic bushing;

[0083] The difference result between the simulation characteristic curve and the test reference curve is calculated, and the model parameters of the nonlinear finite element analysis model are adjusted according to the difference result until the difference result meets a preset difference result threshold, thereby obtaining an adjusted nonlinear finite element analysis model.

[0084] In an embodiment of the present invention, the amplitude and frequency segment corresponding to the test reference curve are obtained, and the static stiffness and dynamic stiffness of the hydraulic bushing under the amplitude and frequency segment corresponding to the test reference curve are simulated and analyzed respectively using a nonlinear finite element analysis model to obtain a first simulation characteristic curve and a second simulation characteristic curve.

[0085] A corresponding static stiffness simulation value is obtained according to the first simulation characteristic curve, and a corresponding dynamic stiffness simulation value is obtained according to the second simulation characteristic curve. The test reference curve includes a first reference curve and a second reference curve. Then, a first difference between the static stiffness simulation value and the static stiffness corresponding to the first reference curve is calculated, and a second difference between the dynamic stiffness simulation value and the dynamic stiffness corresponding to the second reference curve is calculated.

[0086] The first difference and the second difference are respectively compared with the difference threshold, where the difference threshold is set to 0.05. When the first difference and the second difference are not less than the difference threshold, the model parameters of the nonlinear finite element analysis model are adjusted until the first difference and the second difference are both less than the difference threshold, thereby obtaining the adjusted nonlinear finite element analysis model. The nonlinear finite element analysis model is analyzed by the experimental data, thereby improving the model accuracy of the nonlinear finite element analysis model, thereby being able to accurately simulate the interaction between liquid and solid, so that the subsequent prediction of the physical parameters in the preset performance analysis model under different characteristic structures is more in line with reality.

[0087] Step S203, obtaining all characteristic structures of the hydraulic bushing, and for any characteristic structure, using the adjusted nonlinear finite element analysis model, determining the predicted value of the physical parameter in the preset performance analysis model under the characteristic structure.

[0088] The preset performance analysis model is a lumped parameter model or a bond graph model. The characteristic structures of the hydraulic bushing include but are not limited to inertial channels, orifice channels, decoupling membranes, spoilers and other structures. In the preset performance analysis model, the main physical parameters required for simulation include but are not limited to volume compliance, equivalent piston area, nonlinear flow damping coefficient, inertia coefficient of liquid and other parameters.

[0089] The physical parameters in the performance analysis model are mainly determined by the shape (size) of components such as the rubber main spring and the inertial channel, and the performance parameters of the rubber material and the liquid. For example, the volume compliance of the lower liquid chamber in the hydraulic bushing is mainly determined by the size of the rubber bottom membrane. Therefore, in the embodiment of the present invention, the adjusted nonlinear finite element analysis model is used to determine the predicted values ​​of the physical parameters in the preset performance analysis model under each characteristic structure, so as to preliminarily predict the relationship between each characteristic structure in the hydraulic bushing and the physical parameters in the preset performance analysis model, so as to facilitate the subsequent optimization of these physical parameters, so that the hydraulic bushing meets the specified performance requirements.

[0090] Step S204: select N target characteristic structures of the hydraulic bushing from all characteristic structures according to a preset target dynamic performance curve.

[0091] Among them, the target dynamic performance curve represents the performance requirements specified by the hydraulic bushing. Correspondingly, the target characteristic structure refers to the specific characteristic structure that the hydraulic bushing should contain under the specified performance requirements. Therefore, in the present invention, according to the preset target dynamic performance curve, N target characteristic structures of the hydraulic bushing are screened out from all characteristic structures, N>2, and the characteristic structures of the hydraulic bushing are screened according to the performance requirements to preliminarily determine the structural characteristics of the hydraulic bushing, thereby improving the subsequent adjustment accuracy of the preset performance analysis model.

[0092] Optionally, the method of selecting N target characteristic structures of the hydraulic bushing from all characteristic structures according to a preset target dynamic performance curve includes:

[0093] Determine a quantitative result of the performance impact of each characteristic structure, which is used to quantify the impact of each characteristic structure on the dynamic performance of the hydraulic bushing;

[0094] The historical dynamic performance curve of the hydraulic bushing is obtained, the performance difference result between the target dynamic performance curve and the historical dynamic performance curve is calculated, and the N target characteristic structures contained in the hydraulic bushing are determined according to the performance impact quantification results of all characteristic structures and the performance difference results.

[0095] As shown in Table 1, adding an inertial channel can make the hydraulic bushing maintain a large damping angle under the action of large amplitude and frequency range, and effectively attenuate the vibration energy on the transmission path; when subjected to small amplitude and high frequency excitation, adding an orifice channel can significantly improve the high stiffness and low damping dynamic characteristics of the hydraulic bushing, that is, effectively reduce the dynamic stiffness of the hydraulic bushing under high frequency and small vibration, increase the damping angle, increase comfort and effectively attenuate vibration; with the decoupling membrane, the flow rate of the liquid can be controlled to adjust the dynamic performance of the hydraulic bushing in different frequency bands, for example: when the diameter of the hole is increased, the dynamic stiffness of the hydraulic bushing is reduced, the hysteresis angle peak frequency is increased, and the hysteresis angle peak bandwidth is widened; a spoiler plate structure is set on the flow channel plate, and the liquid generates turbulence when flowing around the spoiler plate. The turbulence effect increases the energy loss of the liquid exchange process, enhances the second-order nonlinear fluid damping effect, suppresses the resonance response of the liquid column in the fluid channel, and reduces the high-frequency dynamic hardening degree of the hydraulic bushing, thereby improving the comfort of the whole vehicle under high-frequency excitation.

[0096]

[0097] Table 1

[0098] According to the effect produced by each characteristic structure in different action ranges, in the embodiment of the present invention, each characteristic structure is modularized respectively, so that the modularization results of all characteristic structures constitute a module library, and a module library of different characteristic structures of the hydraulic bushing is established, which is used to modularize each characteristic structure and store it in the terminal for direct call later.

[0099] After building the module library, the influence of each characteristic structure on the dynamic performance of the hydraulic bushing is quantified by the control variable method, so as to determine the characteristic structures to be included in the hydraulic bushing, specifically:

[0100] First, each characteristic structure is called from the module library to determine the quantitative results of the performance impact of each characteristic structure, which is used to quantify the impact of each characteristic structure on the dynamic performance of the hydraulic bushing. For example, through experimental calculations, it is found that adding an inertial channel can increase the damping angle by 20% in the large amplitude and high frequency segment; adding an orifice channel can reduce the dynamic stiffness by 15% in the small amplitude and high frequency segment and increase the damping angle by 10%; adding a decoupling membrane can reduce the dynamic stiffness by 30% in the full frequency segment, increase the lag angle peak frequency by 10%, and increase the lag angle peak bandwidth by 8%; adding a spoiler can reduce the dynamic stiffness by 25% in the high frequency segment.

[0101] Then, according to the difference between the dynamic performance of the hydraulic bushing of the existing structure and the target dynamic performance, the hydraulic bushing of the existing structure is structurally modified to determine the characteristic structure that the hydraulic bushing must include to meet the target dynamic performance. Specifically, the historical dynamic performance curve of the hydraulic bushing is obtained, and the performance difference results between the target dynamic performance curve and the historical dynamic performance curve are calculated. According to the performance impact quantification results and performance difference results of all characteristic structures, the N target characteristic structures included in the hydraulic bushing are determined. For example, after calculation, the hydraulic bushing of a certain vehicle model requires an inertial channel, an orifice channel, a decoupling membrane and two spoilers to achieve the target performance requirements.

[0102] Step S205, according to the physical parameter prediction values ​​of the preset performance analysis model under N target characteristic structures and the test benchmark curve, the model parameters of the preset performance analysis model are adjusted to obtain the adjusted preset performance analysis model, and the specific structure of the hydraulic bushing is determined using the adjusted preset performance analysis model.

[0103] Among them, the adjusted preset performance analysis model may refer to a lumped parameter model or a bond graph model after model calibration, which has a strong performance analysis capability. When faced with new data, the lumped parameter model or the bond graph model after model calibration can be used to accurately fit the dynamic performance curve of the hydraulic bushing. Therefore, in an embodiment of the present invention, after determining the target characteristic structure to be included in the hydraulic bushing, the preset performance analysis model is adjusted according to the predicted value of the physical parameters in the preset performance analysis model corresponding to the target characteristic structure, and the test reference curve, to obtain the adjusted preset performance analysis model, so as to verify the structural design of the hydraulic bushing using the adjusted preset performance analysis model, so as to determine the specific structure of the hydraulic bushing and optimize the performance of the hydraulic bushing.

[0104] Optionally, adjusting the model parameters of the preset performance analysis model according to the predicted values ​​of the physical parameters of the preset performance analysis model under the N target characteristic structures and the test reference curve to obtain the adjusted preset performance analysis model includes:

[0105] Inputting the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures into the preset performance analysis model to perform performance analysis, and outputting corresponding simulation dynamic performance curves;

[0106] According to the curve difference between the simulation dynamic performance curve and the test reference curve, the model parameters of the preset performance analysis model are adjusted until the curve difference meets the preset difference condition, thereby obtaining the adjusted preset performance analysis model.

[0107] In an embodiment of the present invention, after obtaining the predicted values ​​of the physical parameters corresponding to each target characteristic structure input into the preset performance analysis model, the predicted values ​​of the physical parameters of all target characteristic structures are input into the preset performance analysis model, and then, the corresponding simulated dynamic performance curve of the hydraulic bushing is obtained by calculation through the preset performance analysis model, and the simulated dynamic performance curve is used to represent the dynamic stiffness of the hydraulic bushing. For example, assuming that the predicted values ​​of the physical parameters in the performance analysis model are obtained, including the equivalent area of ​​the piston, the pressure of the upper and lower liquid chambers, the volume stiffness of the upper and lower liquid chambers, and the inertia coefficient of the fluid, the performance analysis model can calculate the simulated dynamic performance curve that characterizes the dynamic stiffness under the preset excitation amplitude based on these predicted values ​​of the physical parameters.

[0108] The slope of the simulated dynamic performance curve is obtained to obtain the corresponding simulated dynamic stiffness, the slope of the second reference curve is obtained according to the experimental reference curve, and the reference dynamic stiffness is obtained according to the slope of the second reference curve. The difference between the simulated dynamic stiffness and the reference dynamic stiffness is calculated, and if the difference is not less than the difference threshold, the model parameters of the preset performance analysis model are adjusted until the difference is less than the difference threshold, and the adjusted preset performance analysis model is obtained, wherein the difference threshold is preferably set to 0.05.

[0109] Optionally, the using the adjusted preset performance analysis model to determine the specific structure of the hydraulic bushing includes:

[0110] Obtaining a dynamic performance curve of the hydraulic bushing according to the adjusted preset performance analysis model, analyzing the dynamic performance curve to obtain a corresponding performance analysis value, and detecting whether the performance analysis value meets a preset target performance value;

[0111] If it is detected that the performance analysis value meets the preset target performance value, the specific structure of the hydraulic bushing is determined according to the physical parameter prediction values ​​in the preset performance analysis model under the N target characteristic structures.

[0112] In an embodiment of the present invention, when the difference between the simulated dynamic stiffness corresponding to the simulated dynamic performance curve and the benchmark dynamic stiffness is less than the difference threshold, the preset performance analysis model outputs the corresponding simulated dynamic performance curve, and confirms the simulated dynamic performance curve as the dynamic performance curve of the hydraulic bushing. Then, the slope of the dynamic performance curve is obtained as the performance analysis value, that is, the dynamic stiffness of the hydraulic bushing, and it is detected whether the performance analysis value is equal to the preset target performance value. If it is equal, it means that the physical parameter prediction value of the target characteristic structure of the hydraulic bushing can meet the specified performance requirements of the hydraulic bushing. Therefore, the specific structure of the hydraulic bushing is determined according to the physical parameter prediction value in the preset performance analysis model under the target characteristic structure, and the performance development of the hydraulic bushing is completed.

[0113] Optionally, after detecting whether the performance analysis value meets a preset target performance value, the method further includes:

[0114] If it is detected that the performance analysis value does not meet the preset target performance value, the model parameters of the adjusted nonlinear finite element analysis model are adjusted. After the adjustment, the steps of adjusting the model parameters of the preset performance analysis model according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures and the test benchmark curve are repeated, and the dynamic performance curve of the hydraulic bushing is determined again, and the performance analysis value is analyzed and judged until the performance analysis value meets the preset target performance value.

[0115] In an embodiment of the present invention, if the detected performance analysis value is not equal to the preset target performance value, it means that the performance requirement of the hydraulic bushing is not met. Therefore, the physical parameter prediction value of the input into the preset performance analysis model corresponding to the target characteristic structure is iteratively optimized. Specifically, the model parameters of the adjusted nonlinear finite element analysis model are adjusted. After the adjustment, steps S203 and S205 are repeated to determine the dynamic performance curve of the hydraulic bushing again through the physical parameter prediction values ​​of the preset performance analysis model under the re-acquired N target characteristic structures, and to parse and judge the performance analysis value until the performance analysis value meets the preset target performance value.

[0116] The embodiment of the present invention tests the static and dynamic stiffness of the hydraulic bushing and obtains a corresponding test benchmark curve; obtains a nonlinear finite element analysis model of the hydraulic bushing, and uses the test benchmark curve to adjust the model parameters of the nonlinear finite element analysis model to obtain an adjusted nonlinear finite element analysis model; obtains all characteristic structures of the hydraulic bushing, and for any characteristic structure, uses the adjusted nonlinear finite element analysis model to determine the physical parameter prediction values ​​in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model; according to the preset target dynamic performance curve, N target characteristic structures of the hydraulic bushing are screened out from all characteristic structures, where N>2; according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures, and the test benchmark curve, the model parameters of the preset performance analysis model are adjusted to obtain the adjusted preset performance analysis model, and the specific structure of the hydraulic bushing is determined using the adjusted preset performance analysis model. Among them, the nonlinear finite element analysis model is used to preliminarily predict the relationship between each characteristic structure in the hydraulic bushing and the physical parameters in the preset performance analysis model, that is, to determine the physical parameter prediction value corresponding to each characteristic structure in the preset performance analysis model to clarify the meaning of each physical parameter prediction value, and then the target characteristic structure required for the hydraulic bushing is screened out according to the dynamic performance requirements, so that the accuracy of the preset performance analysis model is adjusted according to the physical parameter prediction values ​​of the preset performance analysis model under all target characteristic structures, thereby improving the accuracy of the performance analysis model, and then using the adjusted preset performance analysis model to optimize the structure of the hydraulic bushing, so that the characteristics of the hydraulic bushing can meet the specified performance requirements, optimize the design process of the hydraulic bushing, and improve the performance of the hydraulic bushing.

[0117] Corresponding to the performance optimization method of the above embodiment, Figure 3 The structural block diagram of a performance optimization device for a hydraulic bushing provided by the second embodiment of the present invention is shown. The performance optimization device can be applied to Figure 1The client in the client, the computer device corresponding to the client connects to the server to obtain the corresponding background data. For example, the nonlinear finite element analysis model of the hydraulic bushing and all the characteristic structures of the hydraulic bushing, etc., are used for the subsequent structural design of the hydraulic bushing. For the convenience of explanation, only the parts related to the embodiment of the present invention are shown.

[0118] See also Figure 3 , the performance optimization device comprises:

[0119] The test module 31 is used to test the static and dynamic stiffness of the hydraulic bushing and obtain a corresponding test reference curve;

[0120] A model calibration module 32, used for obtaining a nonlinear finite element analysis model of the hydraulic bushing, adjusting model parameters of the nonlinear finite element analysis model using the test reference curve, and obtaining an adjusted nonlinear finite element analysis model;

[0121] A model prediction module 33 is used to obtain all characteristic structures of the hydraulic bushing, and for any characteristic structure, use the adjusted nonlinear finite element analysis model to determine the predicted value of the physical parameters in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model;

[0122] A structure screening module 34 is used to screen out N target characteristic structures of the hydraulic bushing from all characteristic structures according to a preset target dynamic performance curve, where N>2;

[0123] The structure determination module 35 is used to adjust the model parameters of the preset performance analysis model according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures and the test benchmark curve to obtain an adjusted preset performance analysis model, and use the adjusted preset performance analysis model to determine the specific structure of the hydraulic bushing.

[0124] Optionally, the nonlinear finite element analysis model of the hydraulic bushing includes a liquid model and a solid model, and the model calibration module 32 includes:

[0125] An equation construction unit, used for obtaining a first dynamic equation corresponding to the liquid model and a second dynamic equation corresponding to the solid model, substituting the kinematic conditions and dynamic conditions on the preset solid-liquid coupling boundary into the first dynamic equation and the second dynamic equation, and obtaining a finite element equation of the solid-liquid coupling system of the hydraulic bushing;

[0126] An equation solving unit is used to solve the finite element equation of the solid-liquid coupling system, and obtain the stress residual of the liquid on the solid on the solid-liquid coupling boundary of the hydraulic bushing and the displacement residual of the liquid on the solid-liquid coupling boundary, and judge whether the stress residual and the displacement residual meet the preset convergence condition;

[0127] The equation adjustment unit is used to adjust the parameters of the finite element equation of the solid-liquid coupling system when it is judged that it is not satisfied, until the stress residual and the displacement residual both satisfy the convergence condition, thereby obtaining the adjusted finite element equation of the solid-liquid coupling system, and confirming that the adjusted finite element equation of the solid-liquid coupling system is the nonlinear finite element analysis model of the hydraulic bushing.

[0128] Optionally, the model calibration module 32 includes:

[0129] A characteristic simulation unit, used for simulating and analyzing the static and dynamic characteristics of the hydraulic bushing using the nonlinear finite element analysis model to obtain a simulation characteristic curve of the hydraulic bushing;

[0130] A parameter adjustment unit is used to calculate the difference result between the simulation characteristic curve and the test reference curve, and adjust the model parameters of the nonlinear finite element analysis model according to the difference result until the difference result meets a preset difference result threshold, thereby obtaining an adjusted nonlinear finite element analysis model.

[0131] Optionally, the structure screening module 34 includes:

[0132] An impact quantification unit, used to determine the performance impact quantification result of each characteristic structure, and used to quantify the impact of each characteristic structure on the dynamic performance of the hydraulic bushing;

[0133] A target determination unit is used to obtain the historical dynamic performance curve of the hydraulic bushing, calculate the performance difference result between the target dynamic performance curve and the historical dynamic performance curve, and determine the N target characteristic structures contained in the hydraulic bushing based on the performance impact quantification results of all characteristic structures and the performance difference results.

[0134] Optionally, the structure determination module 35 includes:

[0135] A performance analysis unit, used for inputting the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures into the preset performance analysis model for performance analysis, and outputting a corresponding simulation dynamic performance curve;

[0136] The model calibration unit is used to adjust the model parameters of the preset performance analysis model according to the curve difference between the simulation dynamic performance curve and the test benchmark curve, until the curve difference meets the preset difference condition, thereby obtaining the adjusted preset performance analysis model.

[0137] Optionally, the structure determination module 35 includes:

[0138] A curve analysis unit, used to obtain a dynamic performance curve of the hydraulic bushing according to the adjusted preset performance analysis model, analyze the dynamic performance curve to obtain a corresponding performance analysis value, and detect whether the performance analysis value meets a preset target performance value;

[0139] The first detection unit is used to determine the specific structure of the hydraulic bushing according to the physical parameter prediction value in the preset performance analysis model under the N target characteristic structures if it is detected that the performance analysis value meets the preset target performance value.

[0140] Optionally, the structure determination module 35 includes:

[0141] A second detection unit is used to detect whether the performance analysis value meets the preset target performance value. If it is detected that the performance analysis value does not meet the preset target performance value, the adjusted nonlinear finite element analysis model is adjusted in parameters. After the adjustment, the steps of adjusting the model parameters of the preset performance analysis model according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures and the test benchmark curve are repeated, and the dynamic performance curve of the hydraulic bushing is determined again, and the performance analysis value is analyzed and judged until the performance analysis value meets the preset target performance value.

[0142] It should be noted that the information interaction, execution process and other contents between the above-mentioned modules and units are based on the same concept as the embodiment of the method of the present invention. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0143] Figure 4 This is a schematic diagram of the structure of a computer device provided in Embodiment 3 of the present invention. Figure 4 As shown, the computer device of this embodiment includes: at least one processor ( Figure 4 Only one is shown), a memory, and a computer program stored in the memory and executable on at least one processor, wherein when the processor executes the computer program, the steps in any of the above-mentioned performance optimization method embodiments are implemented.

[0144] The computer device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that Figure 4This is merely an example of a computer device and does not constitute a limitation on the computer device. The computer device may include more or fewer components than those shown in the figure, or a combination of certain components, or different components. For example, it may also include a network interface, a display screen, and an input device.

[0145] The processor may be a CPU, or other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0146] The memory includes a readable storage medium, an internal memory, etc., wherein the internal memory may be the memory of a computer device, and the internal memory provides an environment for the operation of an operating system and computer-readable instructions in the readable storage medium. The readable storage medium may be a hard disk of a computer device, and in other embodiments may also be an external storage device of a computer device, for example, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on a computer device. Further, the memory may also include both an internal storage unit of a computer device and an external storage device. The memory is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as program codes of computer programs, etc. The memory may also be used to temporarily store data that has been output or is to be output.

[0147] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention. The specific working process of the units and modules in the above-mentioned device can refer to the corresponding process in the above-mentioned method embodiment, which will not be repeated here. 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 computer-readable storage medium. Based on such understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying computer program code, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0148] The present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by a computer program product. When the computer program product runs on a computer device, the computer device can implement the steps in the above-mentioned method embodiment when executing.

[0149] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0150] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0151] In the embodiments provided by the present invention, it should be understood that the disclosed devices / computer equipment and methods can be implemented in other ways. For example, the device / computer equipment embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, 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.

[0152] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0153] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A method for optimizing the performance of a hydraulic bushing, characterized in that: The performance optimization method comprises: The static and dynamic stiffness of the hydraulic bushing is tested, and the corresponding test reference curve is obtained; Acquire a nonlinear finite element analysis model of the hydraulic bushing, and adjust model parameters of the nonlinear finite element analysis model using the test reference curve to obtain an adjusted nonlinear finite element analysis model; Acquire all characteristic structures of the hydraulic bushing, and for any characteristic structure, use the adjusted nonlinear finite element analysis model to determine the predicted value of the physical parameters in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model; According to a preset target dynamic performance curve, N target characteristic structures of the hydraulic bushing are screened out from all characteristic structures, where N>2; According to the predicted values ​​of the physical parameters of the preset performance analysis model under the N target characteristic structures and the test benchmark curve, the model parameters of the preset performance analysis model are adjusted to obtain an adjusted preset performance analysis model, and the specific structure of the hydraulic bushing is determined using the adjusted preset performance analysis model.

2. The performance optimization method according to claim 1, characterized in that: The nonlinear finite element analysis model of the hydraulic bushing includes a liquid model and a solid model, and the step of obtaining the nonlinear finite element analysis model of the hydraulic bushing includes: Obtaining a first dynamic equation corresponding to the liquid model and a second dynamic equation corresponding to the solid model, substituting the preset kinematic conditions and dynamic conditions on the solid-liquid coupling boundary into the first dynamic equation and the second dynamic equation, and obtaining a finite element equation of the solid-liquid coupling system of the hydraulic bushing; Solving the finite element equation of the solid-liquid coupling system, obtaining the stress residual of the liquid on the solid on the solid-liquid coupling boundary of the hydraulic bushing and the displacement residual of the liquid on the solid-liquid coupling boundary, and judging whether the stress residual and the displacement residual meet the preset convergence condition; When it is determined that the condition is not satisfied, the parameters of the finite element equation of the solid-liquid coupling system are adjusted until the stress residual and the displacement residual both satisfy the convergence condition, and an adjusted finite element equation of the solid-liquid coupling system is obtained, and the adjusted finite element equation of the solid-liquid coupling system is confirmed to be a nonlinear finite element analysis model of the hydraulic bushing.

3. The performance optimization method according to claim 1, characterized in that: The step of adjusting the parameters of the nonlinear finite element analysis model by using the test reference curve to obtain the adjusted nonlinear finite element analysis model includes: Using the nonlinear finite element analysis model to simulate and analyze the static and dynamic characteristics of the hydraulic bushing, and obtain a simulation characteristic curve of the hydraulic bushing; The difference result between the simulation characteristic curve and the test reference curve is calculated, and the model parameters of the nonlinear finite element analysis model are adjusted according to the difference result until the difference result meets a preset difference result threshold, thereby obtaining an adjusted nonlinear finite element analysis model.

4. The performance optimization method according to claim 1, characterized in that: The method of selecting N target characteristic structures of the hydraulic bushing from all characteristic structures according to the preset target dynamic performance curve includes: Determine a quantitative result of the performance impact of each characteristic structure, which is used to quantify the impact of each characteristic structure on the dynamic performance of the hydraulic bushing; The historical dynamic performance curve of the hydraulic bushing is obtained, the performance difference result between the target dynamic performance curve and the historical dynamic performance curve is calculated, and the N target characteristic structures contained in the hydraulic bushing are determined according to the performance impact quantification results of all characteristic structures and the performance difference results.

5. The performance optimization method according to claim 1, characterized in that: The method of adjusting the model parameters of the preset performance analysis model according to the predicted values ​​of the physical parameters of the preset performance analysis model under the N target characteristic structures and the test reference curve to obtain the adjusted preset performance analysis model includes: Inputting the predicted values ​​of the physical parameters of the preset performance analysis model under the N target characteristic structures into the preset performance analysis model to perform performance analysis, and outputting corresponding simulation dynamic performance curves; According to the curve difference between the simulation dynamic performance curve and the test reference curve, the model parameters of the preset performance analysis model are adjusted until the curve difference meets the preset difference condition, thereby obtaining the adjusted preset performance analysis model.

6. The performance optimization method according to claim 1, characterized in that: The using the adjusted preset performance analysis model to determine the specific structure of the hydraulic bushing includes: Obtaining a dynamic performance curve of the hydraulic bushing according to the adjusted preset performance analysis model, analyzing the dynamic performance curve to obtain a corresponding performance analysis value, and detecting whether the performance analysis value meets a preset target performance value; If it is detected that the performance analysis value meets the preset target performance value, the specific structure of the hydraulic bushing is determined according to the physical parameter prediction values ​​in the preset performance analysis model under the N target characteristic structures.

7. The performance optimization method according to claim 6, characterized in that: After the detecting whether the performance analysis value meets the preset target performance value, it includes: If it is detected that the performance analysis value does not meet the preset target performance value, the parameters of the adjusted nonlinear finite element analysis model are adjusted, and after the adjustment, the steps of adjusting the model parameters of the preset performance analysis model according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures and the test benchmark curve are repeated, and the dynamic performance curve of the hydraulic bushing is determined again, and the performance analysis value is analyzed and judged until the performance analysis value meets the preset target performance value.

8. A performance optimization device for a hydraulic bushing, characterized in that: The performance optimization device comprises: The test module is used to test the static and dynamic stiffness of the hydraulic bushing and obtain the corresponding test reference curve; A model calibration module, used for obtaining a nonlinear finite element analysis model of the hydraulic bushing, adjusting model parameters of the nonlinear finite element analysis model using the test reference curve, and obtaining an adjusted nonlinear finite element analysis model; A model prediction module, used for obtaining all characteristic structures of the hydraulic bushing, and for any characteristic structure, using the adjusted nonlinear finite element analysis model to determine the predicted value of the physical parameters in the preset performance analysis model under the characteristic structure, wherein the preset performance analysis model is a lumped parameter model or a bond graph model; A structure screening module, used for screening out N target characteristic structures of the hydraulic bushing from all characteristic structures according to a preset target dynamic performance curve, where N>2; A structure determination module is used to adjust the model parameters of the preset performance analysis model according to the physical parameter prediction values ​​of the preset performance analysis model under the N target characteristic structures and the test benchmark curve to obtain an adjusted preset performance analysis model, and use the adjusted preset performance analysis model to determine the specific structure of the hydraulic bushing.

9. A computer device, characterized in that: The computer device includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the performance optimization method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the performance optimization method according to any one of claims 1 to 7 is implemented.

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