A hydraulic bushing vibration characteristic analysis method, device and computer equipment

Abstract

Embodiments of the present application provide a kind of hydraulic bushing vibration characteristic analysis method, device and computer equipment.The method comprises: the mathematical modeling of vehicle is generated first kelvin model;First modeling data of first kelvin model is obtained;According to first modeling data, first vibration characteristic value is generated by calculation;The mathematical modeling of hydraulic bushing is generated second kelvin model;Second modeling data of second kelvin model is obtained;Second vibration characteristic value is generated based on second modeling data and the first vibration characteristic value.The technical scheme provided in the embodiments of the present application, the vibration characteristic value of hydraulic bushing is calculated by the mathematical modeling of vehicle and hydraulic bushing, improve the accuracy of the vibration characteristic analysis of automobile bushing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile bushing, and particularly relates to a vibration characteristic analysis method and device of a hydraulic bushing and a computer device. BACKGROUND

[0002] The main function of the automobile bushing is to reduce vibration, noise and protect components. They protect the comfort of passengers in the car by absorbing and reducing vibration, and prolong the service life of parts. In the related art, high-elasticity rubber, composite materials and the like are used to make automobile bushings to achieve the effect of reducing vibration. A general rubber bushing can reduce lateral stiffness by reducing the stiffness of main rubber, but it will have a bad influence on toe, camber and other suspension design factors (SDF), so that the effect of vibration characteristic analysis of the automobile bushing is poor. SUMMARY

[0003] Therefore, the present application provides a vibration characteristic analysis method and device of a hydraulic bushing and a computer device to improve the accuracy of vibration characteristic analysis of the automobile bushing.

[0004] In one aspect, the present application provides a vibration characteristic analysis method of a hydraulic bushing, comprising:

[0005] mathematically modeling a vehicle to generate a first Kelvin model;

[0006] obtaining first modeling data of the first Kelvin model;

[0007] calculating according to the first modeling data to generate a first vibration characteristic value;

[0008] mathematically modeling a hydraulic bushing to generate a second Kelvin model;

[0009] obtaining second modeling data of the second Kelvin model;

[0010] generating a second vibration characteristic value based on the second modeling data and the first vibration characteristic value.

[0011] Optionally, the step of mathematically modeling the vehicle to generate the first Kelvin model comprises:

[0012] A vehicle is mathematically modeled as a sprung mass, a suspension spring, a damper and a wheel to generate a first Kelvin model, wherein the sprung mass is connected to the suspension spring and the damper in the first Kelvin model, the suspension spring and the damper are connected to the wheel, the wheel is placed on a road surface, a vertical displacement of the sprung mass is a first displacement, and a vertical displacement of the wheel is a second displacement.

[0013] Optionally, the first modeling data of the first Kelvin model is obtained by:

[0014] Sprung mass data is generated according to a sprung mass of the sprung mass and the first displacement;

[0015] Suspension spring data is generated according to a stiffness coefficient of the suspension spring, the first displacement and the second displacement;

[0016] Damper data is generated according to a damping coefficient of the damper, the first displacement and the second displacement.

[0017] Optionally, the first modeling data includes the sprung mass data, the suspension spring data and the damper data, and the first vibration characteristic value is generated by calculation according to the first modeling data, including:

[0018] A vibration equation is established according to the sprung mass data, the suspension spring data and the damper data;

[0019] A harmonic function of the second displacement of the vertical vibration transmitted from the road surface is established;

[0020] Each displacement value in the sprung mass data, the suspension spring data and the damper data is determined according to the harmonic function;

[0021] The each displacement value is substituted into the vibration equation, and a frequency ratio and a damping ratio are represented to generate a relationship between the sprung mass vibration displacement and the road surface vibration displacement and a relationship between the sprung mass vibration acceleration and the road surface vibration displacement;

[0022] The first vibration characteristic value is generated according to the relationship between the sprung mass vibration displacement and the road surface vibration displacement and the relationship between the sprung mass vibration acceleration and the road surface vibration displacement, and the first vibration characteristic value includes a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the vehicle.

[0023] Optionally, the second Kelvin model is generated by mathematically modeling the hydraulic bushing, including:

[0024] Modeling the hydraulic bushing as a sprung mass, a hydraulic bushing spring, a hydraulic bushing damper and a wheel to generate a second Kelvin model, wherein the sprung mass is connected to the hydraulic bushing spring and the hydraulic bushing damper in the second Kelvin model, the hydraulic bushing spring and the hydraulic bushing damper are connected to the wheel, the wheel is placed on the road surface, the vertical displacement of the sprung mass is a first displacement, and the vertical displacement of the wheel is a second displacement.

[0025] Optionally, the second modeling data includes a stiffness coefficient of the hydraulic bushing spring and a damping coefficient of the hydraulic bushing damper.

[0026] Optionally, generating the second vibration characteristic value based on the second modeling data and the first vibration characteristic value includes:

[0027] Substituting the stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the hydraulic bushing damper into the obtained relationship between the sprung mass vibration displacement and the road surface vibration displacement and the relationship between the sprung mass vibration acceleration and the road surface vibration displacement to generate the second vibration characteristic value, the second vibration characteristic value including a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the hydraulic bushing.

[0028] In another aspect, an embodiment of the present application provides a vibration characteristic analysis device for a hydraulic bushing, comprising:

[0029] A first modeling module is configured to model a vehicle mathematically to generate a first Kelvin model.

[0030] A first obtaining module is configured to obtain first modeling data of the first Kelvin model.

[0031] A first generating module is configured to calculate based on the first modeling data to generate a first vibration characteristic value.

[0032] A second modeling module is configured to model the hydraulic bushing mathematically to generate a second Kelvin model.

[0033] A second obtaining module is configured to obtain second modeling data of the second Kelvin model.

[0034] A second generating module is configured to generate a second vibration characteristic value based on the second modeling data and the first vibration characteristic value.

[0035] In another aspect, an embodiment of the present application provides a storage medium, the storage medium comprising a stored program, wherein the program controls the device where the storage medium is located to execute the vibration characteristic analysis method for the hydraulic bushing when the program is running.

[0036] In another aspect, an embodiment of the present application provides a computer device comprising a memory and a processor, the memory being configured to store information comprising program instructions, and the processor being configured to control execution of the program instructions, wherein the program instructions, when loaded by the processor and executed, implement the steps of the method for analyzing vibration characteristics of a hydraulic bushing described above.

[0037] In the technical solution provided by the embodiment of the present application, the vehicle is mathematically modeled to generate a first Kelvin model; first modeling data of the first Kelvin model is obtained; a first vibration characteristic value is generated by calculation based on the first modeling data; the hydraulic bushing is mathematically modeled to generate a second Kelvin model; second modeling data of the second Kelvin model is obtained; and a second vibration characteristic value is generated based on the second modeling data and the first vibration characteristic value. In the technical solution provided by the embodiment of the present application, the vibration characteristic value of the hydraulic bushing is calculated through mathematical modeling of the vehicle and the hydraulic bushing, thereby improving the accuracy of the vibration characteristic analysis of the automobile bushing. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 A structural schematic diagram of a Kelvin model provided in the related art is shown in FIG. 1.

[0040] Figure 2 A flowchart of a method for analyzing vibration characteristics of a hydraulic bushing provided by an embodiment of the present application is shown in FIG. 2.

[0041] Figure 3 A schematic diagram of a first Kelvin model provided by an embodiment of the present application is shown in FIG. 3.

[0042] Figure 4 A schematic diagram of a first vibration characteristic value provided by an embodiment of the present application is shown in FIG. 4.

[0043] Figure 5 A schematic diagram of a second Kelvin model provided by an embodiment of the present application is shown in FIG. 5.

[0044] Figure 6 A schematic diagram of a second vibration characteristic value provided by an embodiment of the present application is shown in FIG. 6.

[0045] Figure 7 A structural schematic diagram of a device for analyzing vibration characteristics of a hydraulic bushing provided by an embodiment of the present application is shown in FIG. 7.

[0046] Figure 8A schematic diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0048] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0049] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0050] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0051] The related art provides a Kelvin model, Figure 1 A structural schematic diagram of the Kelvin model provided in the related art, which is commonly used in suspension shock absorber models, as shown in Figure 1 The Kelvin model is composed of a spring (elastic element) and a damper (viscous element) in parallel, which enables it to simulate the creep process. The balance equation of the Kelvin model is as follows:

[0052] Where f e is the external force, c is the damping coefficient, k is the spring stiffness, z is the vertical displacement, is the vertical velocity.

[0053] If the displacement z is vibrated in the form of a sine function of ω, then the force relationship formula of the spring and damper elements is as follows:

[0054]

[0055] As can be seen from the above force relationship formula, the spring force is a constant independent of frequency, and the relationship between the damping force and frequency is a linear function containing the coefficient C.

[0056] Based on the above Kelvin model, an embodiment of the present application provides a vibration characteristic analysis method of a hydraulic bushing,Figure 2 A flowchart illustrating a vibration characteristic analysis method for a hydraulic bushing according to an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0057] Step 102: Perform mathematical modeling on the vehicle to generate the first Kelvin model.

[0058] In this embodiment of the invention, Figure 3 This is a schematic diagram of a first Kelvin model provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the vehicle can be mathematically modeled as an equivalent sprung mass block, suspension springs, dampers, and wheels, generating a first Kelvin model. In the first Kelvin model, the sprung mass block is connected to the suspension springs and dampers, which are then connected to the wheels. The wheels are placed on the road surface, and the vertical displacement of the sprung mass block is the first displacement Z. b The vertical displacement of the wheel is the second displacement Z. g .

[0059] Step 104: Obtain the first modeling data for the first Kelvin model.

[0060] In embodiments of the present invention, such as Figure 3 As shown, the first modeling data includes sprung mass data. Suspension spring data k(z) b -z g ) and damper data

[0061] Specifically, based on the spring-loaded mass m of the spring-loaded mass block and the first displacement Z b Generate sprung mass data Based on the spring constant k and the first displacement Z b Second displacement Z g Generate suspension spring data k(z) b -z g Based on the damping coefficient c of the damper and the first displacement Z b Second displacement Z g Generate damper data

[0062] Step 106: Calculate based on the first modeling data to generate the first vibration characteristic value.

[0063] In this embodiment of the invention, step 106 specifically includes:

[0064] S1. Establish the vibration equation based on the sprung mass data, suspension spring data, and damper data.

[0065] In this embodiment of the invention, the vibration equation (Formula 10) is as follows:

[0066]

[0067] S2, a harmonic function of a second displacement of the vertical vibration transmitted from the road surface is established.

[0068] In the embodiment of the present application, the harmonic function is z g = Z g e jωt , where e is the base of the natural logarithm, j is the imaginary unit, ω is the angular frequency, and t is the time variable.

[0069] S3, each displacement value in the sprung mass data, the suspension spring data and the damper data is determined according to the harmonic function.

[0070] In the embodiment of the present application, each displacement value (formula 11) in the sprung mass data, the suspension spring data and the damper data is as follows:

[0071] z g = Z g e jωt

[0072]

[0073] z b = Z b e j(ωt+φ)

[0074]

[0075] where ψ can be a hysteresis angle.

[0076] S4, each displacement value (formula 11) is substituted into the vibration equation (formula 10) and expressed by the frequency ratio and the damping ratio, to generate a relationship between the sprung mass vibration displacement and the road surface vibration displacement and a relationship between the sprung mass vibration acceleration and the road surface vibration displacement.

[0077] In the embodiment of the present application, the above-mentioned substitution of each displacement value into the vibration equation is arranged to generate formula (12), which is as follows:

[0078]

[0079] In order to express the above-mentioned formula (12) by the frequency ratio and the damping ratio, the following definition (formula 13) is required: where c c is the critical damping coefficient, ζ is the damping ratio, ω n is the natural angular frequency, and r is the angular frequency ratio.

[0080] Substituting the above formula (13) into formula (12), formula (14) can be obtained:

[0081]

[0082] Formula (14) is the ratio of the sprung mass vibration displacement and the road surface vibration displacement. In addition, for the complex fraction, the following relationship is established, formula (15):

[0083] Then the relationship formula of the sprung mass vibration displacement and the road surface vibration displacement includes formula (16):

[0084]

[0085] The relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement includes formula (17):

[0086]

[0087]

[0088] S5, generating a first vibration characteristic value according to the relationship formula of the sprung mass vibration displacement and the road surface vibration displacement and the relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement, the first vibration characteristic value including a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the vehicle.

[0089] Table 1 is an input data table of the first Kelvin model, as shown in the following table 1:

[0090] Table 1

[0091] Parameter Indication Unit Value Sprung mass m Kg 2.880E+02 Suspension spring k s ]]> N / m 2.274E+04 Natural angular frequency n ]]> ​ Rad / sec 8.886E+00 Damping ratio ζ - 2.700E-01 Critical damping coefficient c c ]]> N / (m / s) 5.118E+03 Damping coefficient c N / (m / s) 1.382E+03

[0092] In the embodiment of the present application, the relationship formula of the sprung mass vibration displacement and the road surface vibration displacement and the relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement can be drawn according to table 1 Figure 4 , Figure 4 The schematic diagram of the first vibration characteristic value provided by an embodiment of the present application.

[0093] Step 108, mathematically modeling the hydraulic bushing to generate a second Kelvin model.

[0094] In the embodiment of the present application, Figure 5 The schematic diagram of the second Kelvin model provided by an embodiment of the present application is as follows Figure 5As shown, the hydraulic bushing can be mathematically modeled as a sprung mass m, a hydraulic bushing spring k*, a hydraulic bushing damper c* and a wheel to generate a second Kelvin model, wherein the sprung mass is connected to the hydraulic bushing spring and the hydraulic bushing damper in the second Kelvin model, the hydraulic bushing spring and the hydraulic bushing damper are connected to the wheel, the wheel is placed on the road surface, and the vertical displacement of the sprung mass is the first displacement Z b , and the vertical displacement of the wheel is the second displacement Z g .

[0095] In the embodiment of the present application, the hydraulic bushing model comprises an outer sleeve, a first liquid chamber, an inner sleeve, an inertia passage and a second liquid chamber. The outer sleeve is connected to the first liquid chamber and the second liquid chamber, the first liquid chamber is connected to the second liquid chamber through the inertia passage, and the inner sleeve is arranged in the middle of the outer sleeve.

[0096] In the embodiment of the present application, the modeling data of the hydraulic bushing model comprises a main rubber stiffness K r , a damping coefficient C r , a first liquid chamber volumetric stiffness K1, a second liquid chamber volumetric stiffness K2, a first liquid chamber pressure P1, a second liquid chamber pressure P2, a first liquid chamber cross-sectional area S1, a second liquid chamber cross-sectional area S2, an inertia passage cross-sectional area S I , an inertia passage fluid mass m I , an inertia passage fluid damping force C I , an inertia passage length L, a displacement of outer sleeve x(t), an inertia passage inner fluid displacement y I (t), a first liquid chamber fluid in-out displacement y1(t) and a second liquid chamber fluid in-out displacement y2(t).

[0097] Step 110, obtaining second modeling data of the second Kelvin model.

[0098] In the embodiment of the present application, the second modeling data comprises a stiffness coefficient k* of the hydraulic bushing spring and a damping coefficient c* of the damper of the hydraulic bushing.

[0099] Step 112, generating second vibration characteristic values based on the second modeling data and the first vibration characteristic values.

[0100] Specifically, the stiffness coefficient k* of the hydraulic bushing spring and the damping coefficient c* of the damper of the hydraulic bushing are substituted into the obtained relationship formula of the sprung mass vibration displacement and the road surface vibration displacement and the relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement to generate the second vibration characteristic value, and the second vibration characteristic value includes the sprung vibration acceleration ratio and the sprung vibration displacement ratio of the hydraulic bushing.

[0101] The stiffness coefficient k* of the hydraulic bushing spring and the damping coefficient c* of the damper of the hydraulic bushing are substituted into the obtained relationship formula of the sprung mass vibration displacement and the road surface vibration displacement and the relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement to generate the second vibration characteristic value, and the second vibration characteristic value includes the sprung vibration acceleration ratio and the sprung vibration displacement ratio of the hydraulic bushing.

[0102] (20-a)

[0103] (20-b) (20-f)

[0104] (20-g)

[0105] Formula (21)

[0106] (21-a)

[0107] (21-b) (20-f)

[0108] (20-g)

[0109] Table II is an input data table of the first Kelvin model, as shown in the following Table II:

[0110]

[0111]

[0112] In the embodiment of the present application, the second vibration characteristic value can be drawn according to Table II and the above formula for generating the second vibration characteristic value. Figure 6 , Figure 6 is a schematic diagram of the second vibration characteristic value provided by an embodiment of the present application.

[0113] In the embodiment of the present application, the parameters of the hydraulic bushing model can be adjusted according to the curve in Figure 6 .

[0114] In the technical solution provided by this invention, a vehicle is mathematically modeled to generate a first Kelvin model; first modeling data of the first Kelvin model is obtained; a first vibration characteristic value is generated based on the first modeling data; a hydraulic bushing is mathematically modeled to generate a second Kelvin model; second modeling data of the second Kelvin model is obtained; and a second vibration characteristic value is generated based on the second modeling data and the first vibration characteristic value. In the technical solution provided by this invention, the vibration characteristic value of the hydraulic bushing is calculated by mathematically modeling the vehicle and the hydraulic bushing, thus improving the accuracy of vibration characteristic analysis of automotive bushings.

[0115] One embodiment of the present invention provides a vibration characteristic analysis device for hydraulic bushings. Figure 7 This is a schematic diagram of a vibration characteristic analysis device for a hydraulic bushing according to an embodiment of the present invention, as shown below. Figure 7 As shown, the device includes: a first modeling module 11, a first acquisition module 12, a first generation module 13, a second modeling module 14, a second acquisition module 15, and a second generation module 16.

[0116] The first modeling module 11 is used to perform mathematical modeling of the vehicle and generate the first Kelvin model.

[0117] The first acquisition module 12 is used to acquire the first modeling data of the first Kelvin model.

[0118] The first generation module 13 is used to calculate and generate the first vibration characteristic value based on the first modeling data.

[0119] The second modeling module 14 is used to perform mathematical modeling of the hydraulic bushing and generate a second Kelvin model.

[0120] The second acquisition module 15 is used to acquire the second modeling data of the second Kelvin model.

[0121] The second generation module 16 is used to generate a second vibration characteristic value based on the second modeling data and the first vibration characteristic value.

[0122] In this embodiment of the invention, the first modeling module 11 is specifically used to mathematically model the vehicle as equivalent to a sprung mass block, suspension spring, damper, and wheel, generating a first Kelvin model. In the first Kelvin model, the sprung mass block is connected to the suspension spring and the damper, the suspension spring and the damper are connected to the wheel, the wheel is placed on the road surface, the vertical displacement of the sprung mass block is the first displacement, and the vertical displacement of the wheel is the second displacement.

[0123] In this embodiment of the invention, the first acquisition module 12 is specifically used for:

[0124] generate spring mass data according to the spring mass of the spring mass block and the first displacement;

[0125] generate suspension spring data according to the stiffness coefficient of the suspension spring, the first displacement and the second displacement;

[0126] generate damper data according to the damping coefficient of the damper, the first displacement and the second displacement.

[0127] In the embodiment of the present application, the first modeling data includes the spring mass data, the suspension spring data and the damper data, and the first generation module 13 is specifically configured to:

[0128] establish a vibration equation according to the spring mass data, the suspension spring data and the damper data;

[0129] establish a second displacement of a vertical vibration transmitted from a road surface as a harmonic function;

[0130] determine each displacement value in the spring mass data, the suspension spring data and the damper data according to the harmonic function;

[0131] substitute the each displacement value into the vibration equation, and express the vibration equation with a frequency ratio and a damping ratio, to generate a relationship between a spring vibration displacement and a road vibration displacement and a relationship between a spring vibration acceleration and the road vibration displacement;

[0132] generate the first vibration characteristic value according to the relationship between the spring vibration displacement and the road vibration displacement and the relationship between the spring vibration acceleration and the road vibration displacement, the first vibration characteristic value including a sprung vibration acceleration ratio and a sprung vibration displacement ratio of a vehicle.

[0133] In the embodiment of the present application, the second modeling module 14 is specifically configured to equivalently model a hydraulic bushing as a spring mass block, a hydraulic bushing spring, a hydraulic bushing damper and a wheel to generate a second Kelvin model, wherein the spring mass block is connected with the hydraulic bushing spring and the hydraulic bushing damper respectively in the second Kelvin model, the hydraulic bushing spring and the hydraulic bushing damper are connected with the wheel, the wheel is placed on a road surface, a vertical displacement of the spring mass block is the first displacement, and a vertical displacement of the wheel is the second displacement.

[0134] In the embodiment of the present application, the second modeling data includes a stiffness coefficient of the hydraulic bushing spring and a damping coefficient of the damper of the hydraulic bushing.

[0135] In the embodiment of the present application, the second generation module 16 is specifically configured to substitute the stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the damper of the hydraulic bushing into the obtained relationship formula of the sprung mass vibration displacement and the road surface vibration displacement and the relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement, and generate the second vibration characteristic value, wherein the second vibration characteristic value includes the sprung vibration acceleration ratio and the sprung vibration displacement ratio of the hydraulic bushing.

[0136] In the technical scheme provided by the embodiment of the present application, the vehicle is mathematically modeled to generate a first Kelvin model; first modeling data of the first Kelvin model is obtained; the first vibration characteristic value is generated by calculation according to the first modeling data; the hydraulic bushing is mathematically modeled to generate a second Kelvin model; second modeling data of the second Kelvin model is obtained; and the second vibration characteristic value is generated based on the second modeling data and the first vibration characteristic value. In the technical scheme provided by the embodiment of the present application, the vibration characteristic value of the hydraulic bushing is calculated through mathematical modeling of the vehicle and the hydraulic bushing, thereby improving the accuracy of the vibration characteristic analysis of the automobile bushing.

[0137] The vibration characteristic analysis device of the hydraulic bushing provided by the embodiment of the present application can be used to implement the vibration characteristic analysis method of the hydraulic bushing in the above Figure 2 The specific description can be referred to the embodiment of the vibration characteristic analysis method of the hydraulic bushing.

[0138] The embodiment of the present application provides a storage medium, the storage medium includes a stored program, wherein when the program runs, the device where the storage medium is located is controlled to execute each step of the embodiment of the vibration characteristic analysis method of the hydraulic bushing, and the specific description can be referred to the embodiment of the vibration characteristic analysis method of the hydraulic bushing.

[0139] The embodiment of the present application provides a computer device, including a memory and a processor, the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, the program instructions are loaded and executed by the processor to realize each step of the embodiment of the vibration characteristic analysis method of the hydraulic bushing, and the specific description can be referred to the embodiment of the vibration characteristic analysis method of the hydraulic bushing.

[0140] Figure 8 A schematic diagram of a computer device provided by the embodiment of the present application is shown in FIG. 8. Figure 8As shown, the computer device 20 of this embodiment includes a processor 21, a memory 22, and a computer program 23 stored in the memory 22 and executable on the processor 21, which, when executed by the processor 21, implements the method for analyzing the vibration characteristics of the hydraulic bushing in the embodiment, and thus details are not repeated here. Alternatively, the computer program, when executed by the processor 21, implements the functions of the models / units in the device for analyzing the vibration characteristics of the hydraulic bushing in the embodiment, and thus details are not repeated here.

[0141] The computer device 20 includes, but is not limited to, the processor 21 and the memory 22. Those skilled in the art can understand that the computer device 20 can further include other components, such as an input / output device, a network access device, a bus, etc. Figure 8 The computer device 20 is only an example and does not constitute a limitation on the computer device 20, and can include more or fewer components than shown, or combine certain components, or include different components, for example, the computer device can further include an input / output device, a network access device, a bus, etc.

[0142] The processor 21 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0143] The memory 22 can be an internal storage unit of the computer device 20, such as a hard disk or a memory of the computer device 20. The memory 22 can also be an external storage device of the computer device 20, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 22 can include both the internal storage unit and the external storage device of the computer device 20. The memory 22 is used to store computer programs and other programs and data required by the computer device. The memory 22 can also be used to temporarily store data that has been output or will be output.

[0144] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0145] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be implemented by other manners. For example, the foregoing device embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0146] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0147] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

[0148] The integrated unit realized in the form of software functional unit can be stored in a computer readable storage medium. The software functional unit stored in a storage medium includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes a variety of program code storage media such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0149] The foregoing is merely a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of analyzing the vibration characteristics of a hydraulic bushing, characterized by, The method comprises: mathematically modeling a vehicle to generate a first Kelvin model; obtaining first modeling data of the first Kelvin model; calculating according to the first modeling data to generate a first vibration characteristic value; mathematically modeling a hydraulic bushing to generate a second Kelvin model; obtaining second modeling data of the second Kelvin model; generating a second vibration characteristic value based on the second modeling data and the first vibration characteristic value; the method of mathematically modeling a vehicle to generate a first Kelvin model comprises: mathematically modeling a vehicle as a sprung mass, a suspension spring, a damper and a wheel to generate a first Kelvin model, wherein in the first Kelvin model, the sprung mass is connected to the suspension spring and the damper respectively, the suspension spring and the damper are connected to the wheel, the wheel is placed on the road surface, the vertical displacement of the sprung mass is the first displacement, and the vertical displacement of the wheel is the second displacement; the method of mathematically modeling a hydraulic bushing to generate a second Kelvin model comprises: mathematically modeling a hydraulic bushing as a sprung mass, a hydraulic bushing spring, a hydraulic bushing damper and a wheel to generate a second Kelvin model, wherein in the second Kelvin model, the sprung mass is connected to the hydraulic bushing spring and the hydraulic bushing damper respectively, the hydraulic bushing spring and the hydraulic bushing damper are connected to the wheel, the wheel is placed on the road surface, the vertical displacement of the sprung mass is the first displacement, and the vertical displacement of the wheel is the second displacement.

2. The method of claim 1, wherein, The method of obtaining first modeling data of the first Kelvin model comprises: generating sprung mass data according to the sprung mass of the sprung mass and the first displacement; generating suspension spring data according to the stiffness coefficient of the suspension spring, the first displacement and the second displacement; generating damper data according to the damping coefficient of the damper, the first displacement and the second displacement.

3. The method of claim 1, wherein, The first modeling data comprises the sprung mass data, the suspension spring data and the damper data, and the method of calculating according to the first modeling data to generate a first vibration characteristic value comprises: establishing a vibration equation according to the sprung mass data, the suspension spring data and the damper data; establishing a second displacement of the vertical vibration transmitted from the road surface as a harmonic function; determining each displacement value in the sprung mass data, the suspension spring data and the damper data according to the harmonic function; substituting the each displacement value into the vibration equation and expressing it with a frequency ratio and a damping ratio to generate a relationship between the sprung mass vibration displacement and the road surface vibration displacement and a relationship between the sprung mass vibration acceleration and the road surface vibration displacement; generating the first vibration characteristic value according to the relationship between the sprung mass vibration displacement and the road surface vibration displacement and the relationship between the sprung mass vibration acceleration and the road surface vibration displacement, the first vibration characteristic value comprising a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the vehicle.

4. The method of claim 1, wherein, The second modeling data comprises the stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the damper of the hydraulic bushing.

5. The method of claim 4, wherein, generating a second vibration characteristic value based on the second modeling data and the first vibration characteristic value, comprising: The stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the damper of the hydraulic bushing are substituted into the obtained relationship formula of the sprung mass vibration displacement and the road surface vibration displacement and the relationship formula of the sprung mass vibration acceleration and the road surface vibration displacement, and a second vibration characteristic value is generated, the second vibration characteristic value including a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the hydraulic bushing.

6. A device for analyzing the vibration characteristics of a hydraulic bushing, characterized by comprising: comprising: The first modeling module is configured to mathematically model the vehicle to generate a first Kelvin model. The first obtaining module is configured to obtain first modeling data of the first Kelvin model. The first generating module is configured to calculate based on the first modeling data to generate a first vibration characteristic value. The second modeling module is configured to mathematically model the hydraulic bushing to generate a second Kelvin model. The second obtaining module is configured to obtain second modeling data of the second Kelvin model. The second generating module is configured to generate a second vibration characteristic value based on the second modeling data and the first vibration characteristic value. The first modeling module is specifically configured to mathematically model the vehicle to generate a first Kelvin model by equivalently modeling the vehicle as a sprung mass block, a suspension spring, a damper and a wheel, wherein the sprung mass block is connected to the suspension spring and the damper respectively in the first Kelvin model, the suspension spring and the damper are connected to the wheel, the wheel is placed on the road surface, the vertical displacement of the sprung mass block is a first displacement, and the vertical displacement of the wheel is a second displacement. The second modeling module is specifically configured to mathematically model the hydraulic bushing to generate a second Kelvin model by equivalently modeling the hydraulic bushing as a sprung mass block, a hydraulic bushing spring, a hydraulic bushing damper and a wheel, wherein the sprung mass block is connected to the hydraulic bushing spring and the hydraulic bushing damper respectively in the second Kelvin model, the hydraulic bushing spring and the hydraulic bushing damper are connected to the wheel, the wheel is placed on the road surface, the vertical displacement of the sprung mass block is a first displacement, and the vertical displacement of the wheel is a second displacement.

7. A storage medium, characterized by The storage medium comprises a stored program, wherein when the program is running, the device in which the storage medium is located is controlled to execute the hydraulic bushing vibration characteristic analysis method of any one of claims 1 to 5.

8. A computer device comprising a memory for storing information including program instructions, and a processor for controlling execution of the program instructions, characterized in that, The program instructions are loaded and executed by the processor to implement the steps of the hydraulic bushing vibration characteristic analysis method of any one of claims 1 to 5.

Images