Vibration characteristic analysis method and device of hydraulic bushing and computer equipment

Abstract

The embodiment of the invention provides a vibration characteristic analysis method and device of a hydraulic bushing and computer equipment. The method comprises the steps that mathematical modeling is conducted on a vehicle, and a first Kelvin model is generated; obtaining first modeling data of the first Kelvin model; calculating according to the first modeling data to generate a first vibration characteristic value; performing mathematical modeling on the hydraulic bushing to generate a second Kelvin model; acquiring second modeling data of a second Kelvin model; a second vibration characteristic value is generated based on second modeling data and the first vibration characteristic value. According to the technical scheme provided by the embodiment of the invention, the vibration characteristic value of the hydraulic bushing is calculated through mathematical modeling of the vehicle and the hydraulic bushing, and the accuracy of vibration characteristic analysis of the automobile bushing is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile bushings, and in particular to a vibration characteristic analysis method, device and computer equipment of a hydraulic bushing. Background Art

[0002] The main functions of automobile bushings are shock absorption, noise reduction and component protection. They protect the comfort of passengers in the car by absorbing and reducing vibrations, while extending the service life of components. In the related art, automobile bushings are made of high elastic rubber, composite materials, etc. to achieve vibration reduction effects. General rubber bushings can reduce lateral stiffness by reducing the stiffness of the main rubber, but will have a bad effect on suspension design factors (Suspension Design Factors, SDF) such as wheel base difference (toe) and wheel camber (camber), making the effect of vibration characteristic analysis of automobile bushings poor. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a method, an apparatus and a computer device for analyzing the vibration characteristics of a hydraulic bushing, so as to improve the accuracy of the vibration characteristics analysis of an automobile bushing.

[0004] On the one hand, an embodiment of the present invention provides a method for analyzing vibration characteristics of a hydraulic bushing, comprising:

[0005] Mathematically model the vehicle to generate the first Kelvin model;

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

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

[0008] Mathematical modeling of hydraulic bushings was performed to generate the second Kelvin model;

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

[0010] A second vibration characteristic value is generated based on the second modeling data and the first vibration characteristic value.

[0011] Optionally, performing mathematical modeling on the vehicle to generate a first Kelvin model includes:

[0012] The vehicle is equivalent to a sprung mass block, a suspension spring, a damper and a wheel for mathematical modeling to generate a first Kelvin model, wherein in the first Kelvin model, the sprung mass block is respectively 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.

[0013] Optionally, the acquiring first modeling data of the first Kelvin model includes:

[0014] generating sprung mass data according to the sprung mass of the sprung mass and the first displacement;

[0015] generating suspension spring data according to the 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 sprung mass data, suspension spring data, and damper data, and the step of calculating according to the first modeling data to generate a first vibration characteristic value includes:

[0018] establishing a vibration equation based on the sprung mass data, the suspension spring data, and the damper data;

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

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

[0021] Substituting each displacement value into the vibration equation and expressing it by frequency ratio and damping ratio, a relational expression between sprung mass vibration displacement and road surface vibration displacement and a relational expression between sprung mass vibration acceleration and road surface vibration displacement are generated;

[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. The first vibration characteristic value includes a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the vehicle.

[0023] Optionally, the performing mathematical modeling on the hydraulic bushing to generate a second Kelvin model comprises:

[0024] The hydraulic bushing is equivalent to a sprung mass block, a hydraulic bushing spring, a hydraulic bushing damper and a wheel for mathematical modeling to generate a second Kelvin model, wherein in the second Kelvin model, the sprung mass block is respectively connected to the hydraulic bushing spring and the hydraulic bushing damper, 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 the first displacement, and the vertical displacement of the wheel is the second displacement.

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

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

[0027] Substitute the stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the hydraulic bushing damper into the acquired 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 a second vibration characteristic value, which includes the sprung vibration acceleration ratio and the sprung vibration displacement ratio of the hydraulic bushing.

[0028] On the other hand, an embodiment of the present invention provides a vibration characteristic analysis device for a hydraulic bushing, comprising:

[0029] A first modeling module, used for mathematically modeling the vehicle and generating a first Kelvin model;

[0030] A first acquisition module, used for acquiring first modeling data of the first Kelvin model;

[0031] A first generating module, used for performing calculation according to the first modeling data to generate a first vibration characteristic value;

[0032] A second modeling module is used for mathematically modeling the hydraulic bushing to generate a second Kelvin model;

[0033] A second acquisition module, used for acquiring second modeling data of the second Kelvin model;

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

[0035] On the other hand, an embodiment of the present invention provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned vibration characteristic analysis method of the hydraulic bushing.

[0036] On the other hand, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, wherein the program instructions, when loaded and executed by the processor, implement the steps of the above-mentioned vibration characteristics analysis method of the hydraulic bushing.

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

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments 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 creative work.

[0039] Figure 1 A schematic diagram of the structure of the Kelvin model provided in the related art;

[0040] Figure 2 A flow chart of a method for analyzing vibration characteristics of a hydraulic bushing provided in one embodiment of the present invention;

[0041] Figure 3 A schematic diagram of a first Kelvin model provided by an embodiment of the present invention;

[0042] Figure 4 A schematic diagram of a first vibration characteristic value provided by an embodiment of the present invention;

[0043] Figure 5 A schematic diagram of a second Kelvin model provided by an embodiment of the present invention;

[0044] Figure 6 A schematic diagram of a second vibration characteristic value provided by an embodiment of the present invention;

[0045] Figure 7 A schematic structural diagram of a vibration characteristic analysis device for a hydraulic bushing provided in one embodiment of the present invention;

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

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

[0048] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0050] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] A Kelvin model is provided in the related art. Figure 1 It is a structural schematic diagram of the Kelvin model provided in the related art. The Kelvin model is mostly used for suspension shock absorber models, such as Figure 1 As shown in Figure 1, the Kelvin model consists of a spring (elastic element) and a damper (viscous element) in parallel. This structure enables it to simulate the creep process. The equilibrium equation of the Kelvin model is as follows:

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

[0053] If the displacement z oscillates as a sinusoidal function of ω, then the forces of the spring and damper elements are related by the following formula:

[0054]

[0055] From the above force relationship formula, it can be seen that the spring force is a constant that is independent of frequency, while the relationship between the damping force and frequency is a linear function including the coefficient C.

[0056] Based on the above Kelvin model, an embodiment of the present invention provides a method for analyzing the vibration characteristics of a hydraulic bushing. Figure 2 A flow chart of a method for analyzing vibration characteristics of a hydraulic bushing provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the method includes:

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

[0058] In the embodiment of the present invention, Figure 3 A schematic diagram of a first Kelvin model provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the vehicle can be equivalent to a sprung mass block, a suspension spring, a damper and a wheel for mathematical modeling to generate a first Kelvin model, wherein in the first Kelvin model, the sprung mass block 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, 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 first modeling data of a first Kelvin model.

[0060] In the embodiment of the present invention, 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, according to the sprung mass m of the sprung mass block and the first displacement Z b , generate sprung mass data According to the stiffness coefficient k of the suspension spring, the first displacement Z b and the second displacement Z g , generate suspension spring data k(z b -z g );According to the damping coefficient c of the damper, the first displacement Z b and the second displacement Z g , generate damper data

[0062] Step 106: Perform calculation according to the first modeling data to generate a first vibration characteristic value.

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

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

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

[0066]

[0067] S2. Establish the harmonic function of the second displacement of the vertical vibration transmitted from the road surface.

[0068] In the embodiment of the present invention, 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. Determine each displacement value in the sprung mass data, the suspension spring data, and the damper data according to the harmonic function.

[0070] In the embodiment of the present invention, 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] Here, ψ can be the hysteresis angle.

[0076] S4. Substitute each displacement value (Formula 11) into the vibration equation (Formula 10) and express it with frequency ratio and damping ratio to generate 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.

[0077] In the embodiment of the present invention, each displacement value is substituted into the vibration equation to generate formula (12), which is as follows:

[0078]

[0079] In order to express the above formula (12) in terms of frequency ratio and damping ratio, the following definition is required (Formula 13): Among them, 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), we can obtain formula (14):

[0081]

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

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

[0084]

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

[0086]

[0087]

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

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

[0090] Table 1

[0091] parameter express unit value Sprung mass m Kg 2.880E+02 Suspension springs <![CDATA[k s ]]> N / m 2.274E+04 Natural angular frequency <![CDATA[ω n ]]> Rad / sec 8.886E+00 Damping ratio ζ - 2.700E-01 Critical damping coefficient <![CDATA[c c ]]> N / (m / s) 5.118E+03 Damping coefficient c N / (m / s) 1.382E+03

[0092] In the embodiment of the present invention, 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 can be plotted according to Table 1. Figure 4 , Figure 4 A schematic diagram of a first vibration characteristic value provided by an embodiment of the present invention.

[0093] Step 108: Perform mathematical modeling on the hydraulic bushing to generate a second Kelvin model.

[0094] In the embodiment of the present invention, Figure 5 A schematic diagram of a second Kelvin model provided by an embodiment of the present invention is shown in FIG. Figure 5As shown, the hydraulic bushing can be equivalent to a sprung mass block m, a hydraulic bushing spring k*, a hydraulic bushing damper c* and a wheel for mathematical modeling to generate a second Kelvin model, wherein in the second Kelvin model, the sprung mass block 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, 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 .

[0095] In the embodiment of the present invention, the hydraulic bushing model includes: 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 respectively, the first liquid chamber and the second liquid chamber are connected through the inertia passage, and the inner sleeve is arranged in the middle of the outer sleeve.

[0096] In the embodiment of the present invention, the modeling data of the hydraulic bushing model includes: main rubber stiffness K r , attenuation coefficient C r , first liquid chamber volumetric stiffness K1, second liquid chamber volumetric stiffness K2, first liquid chamber pressure P1, second liquid chamber pressure P2, first liquid chamber cross-sectional area S1, second liquid chamber cross-sectional area S2, inertia track cross-sectional area S I 、Inertial path fluid mass m I 、Inertial channel fluid damping force C I , inertial passage length L, outer sleeve displacement x(t), fluid displacement y in the inertial passage I (t), the first liquid chamber fluid inlet and outlet displacement y1(t) and the second liquid chamber fluid inlet and outlet displacement y2(t).

[0097] Step 110: Obtain second modeling data of a second Kelvin model.

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

[0099] Step 112: Generate a second vibration characteristic value based on the second modeling data and the first vibration characteristic value.

[0100] Specifically, the stiffness coefficient k* of the hydraulic bushing spring and the damping coefficient c* of the hydraulic bushing damper can be substituted into 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 to generate a second vibration characteristic value, which includes the sprung vibration acceleration ratio and the sprung vibration displacement ratio of the hydraulic bushing.

[0101] Substituting the spring coefficient k* of the hydraulic bushing spring and the damping coefficient c* of the hydraulic bushing damper into the obtained relationship between the sprung mass vibration displacement and the road surface vibration displacement, formula (16) and the relationship between the sprung mass vibration acceleration and the road surface vibration displacement, formula (17), the formula (20) for generating the second vibration characteristic value is as follows:

[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 2 is the input data table of the first Kelvin model, as shown in Table 2 below: Table 2

[0110]

[0111]

[0112] In the embodiment of the present invention, the second vibration characteristic value can be generated according to Table 2 and the formula Figure 6 , Figure 6 A schematic diagram of a second vibration characteristic value provided by an embodiment of the present invention.

[0113] In the embodiment of the present invention, it is possible to Figure 6 The curves in adjust the parameters of the hydraulic bushing model.

[0114] In the technical solution provided by the embodiment of the present invention, mathematical modeling is performed on the vehicle to generate a first Kelvin model; first modeling data of the first Kelvin model is obtained; calculation is performed based on the first modeling data to generate a first vibration characteristic value; mathematical modeling is performed on the hydraulic bushing 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 invention, the vibration characteristic value of the hydraulic bushing is calculated by mathematically modeling the vehicle and the hydraulic bushing, thereby improving the accuracy of the vibration characteristic analysis of the automobile bushing.

[0115] An embodiment of the present invention provides a vibration characteristic analysis device for a hydraulic bushing. Figure 7 A structural schematic diagram of a vibration characteristic analysis device for a hydraulic bushing provided in one embodiment of the present invention is shown in FIG. 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 on the vehicle and generate a first Kelvin model.

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

[0118] The first generating module 13 is used to perform calculation according to the first modeling data to generate a first vibration characteristic value.

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

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

[0121] The second generating 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 the embodiment of the present invention, the first modeling module 11 is specifically used to mathematically model the vehicle equivalent to a sprung mass block, a suspension spring, a damper and a wheel to generate a first Kelvin model, wherein in the first Kelvin model, the sprung mass block is respectively 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 the embodiment of the present invention, the first acquisition module 12 is specifically used for:

[0124] generating sprung mass data according to the sprung mass of the sprung mass and the first displacement;

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

[0126] Damper data is generated according to a damping coefficient of the damper, the first displacement, and the second displacement.

[0127] In the embodiment of the present invention, the first modeling data includes sprung mass data, suspension spring data and damper data, and the first generating module 13 is specifically used for:

[0128] establishing a vibration equation based on the sprung mass data, the suspension spring data, and the damper data;

[0129] Establishing the harmonic function of the second displacement of the vertical vibration transmitted from the road surface;

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

[0131] Substituting each displacement value into the vibration equation and expressing it by frequency ratio and damping ratio, a relational expression between sprung mass vibration displacement and road surface vibration displacement and a relational expression between sprung mass vibration acceleration and road surface vibration displacement are generated;

[0132] 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. The first vibration characteristic value includes a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the vehicle.

[0133] In the embodiment of the present invention, the second modeling module 14 is specifically used to mathematically model the hydraulic bushing as a sprung mass block, a hydraulic bushing spring, a hydraulic bushing damper and a wheel, and generate a second Kelvin model, wherein the sprung mass block in the second Kelvin model is respectively connected to the hydraulic bushing spring and the hydraulic bushing damper, 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 the first displacement, and the vertical displacement of the wheel is the second displacement.

[0134] In the embodiment of the present invention, 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 invention, the second generating module 16 is specifically used to substitute the stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the damper of the hydraulic bushing into the acquired 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 a 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 solution provided by the embodiment of the present invention, mathematical modeling is performed on the vehicle to generate a first Kelvin model; first modeling data of the first Kelvin model is obtained; calculation is performed based on the first modeling data to generate a first vibration characteristic value; mathematical modeling is performed on the hydraulic bushing 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 invention, the vibration characteristic value of the hydraulic bushing is calculated by mathematically modeling 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 in the embodiment of the present invention can be used to achieve the above Figure 2 The vibration characteristic analysis method of the hydraulic bushing in the embodiment of the vibration characteristic analysis method of the hydraulic bushing can be described in detail, and will not be repeated here.

[0138] An embodiment of the present invention provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the embodiment of the above-mentioned vibration characteristic analysis method of the hydraulic bushing. For a specific description, please refer to the embodiment of the above-mentioned vibration characteristic analysis method of the hydraulic bushing.

[0139] An embodiment of the present invention provides a computer device, including a memory and a processor, the memory is used to store information including program instructions, the processor is used to control the execution of the program instructions, and the program instructions, when loaded and executed by the processor, implement the steps of the embodiment of the above-mentioned method for analyzing the vibration characteristics of the hydraulic bushing. For a specific description, please refer to the embodiment of the above-mentioned method for analyzing the vibration characteristics of the hydraulic bushing.

[0140] Figure 8 A schematic diagram of a computer device provided by an embodiment of the present invention. 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. When the computer program 23 is executed by the processor 21, the vibration characteristic analysis method applied to the hydraulic bushing in the embodiment is implemented. To avoid repetition, it is not described one by one here. Alternatively, when the computer program is executed by the processor 21, the functions of each model / unit in the vibration characteristic analysis device applied to the hydraulic bushing in the embodiment are implemented. To avoid repetition, it is not described one by one here.

[0141] The computer device 20 includes, but is not limited to, a processor 21 and a memory 22. Those skilled in the art will appreciate that Figure 8 It is only an example of the computer device 20 and does not constitute a limitation of the computer device 20. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

[0142] The processor 21 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (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.

[0143] The memory 22 may be an internal storage unit of the computer device 20, such as a hard disk or memory of the computer device 20. The memory 22 may 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. equipped on the computer device 20. Further, the memory 22 may also include both an internal storage unit of the computer device 20 and an external storage device. The memory 22 is used to store computer programs and other programs and data required by the computer device. The memory 22 may also be used to temporarily store data that has been output or is to 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 systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0145] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, 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 an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0146] 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.

[0147] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0148] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (Processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0149] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for analyzing vibration characteristics of a hydraulic bushing, characterized in that: include: Mathematically model the vehicle to generate the first Kelvin model; Acquiring first modeling data of the first Kelvin model; Perform calculation according to the first modeling data to generate a first vibration characteristic value; Mathematical modeling of hydraulic bushings was performed to generate the second Kelvin model; acquiring second modeling data of the second Kelvin model; A second vibration characteristic value is generated based on the second modeling data and the first vibration characteristic value.

2. The method according to claim 1, characterized in that The method of mathematically modeling the vehicle to generate a first Kelvin model includes: The vehicle is equivalent to a sprung mass block, a suspension spring, a damper and a wheel for mathematical modeling to generate a first Kelvin model, wherein in the first Kelvin model, the sprung mass block is respectively 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.

3. The method according to claim 2, characterized in that The obtaining of first modeling data of the first Kelvin model includes: 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; Damper data is generated according to a damping coefficient of the damper, the first displacement, and the second displacement.

4. The method according to claim 1, characterized in that: The first modeling data includes sprung mass data, suspension spring data, and damper data, and the calculation based on the first modeling data to generate the first vibration characteristic value includes: establishing a vibration equation based on the sprung mass data, the suspension spring data, and the damper data; Establishing the harmonic function of the second displacement of the vertical vibration transmitted from the road surface; determining each displacement value in the sprung mass data, the suspension spring data, and the damper data according to the harmonic function; Substituting each displacement value into the vibration equation and expressing it by frequency ratio and damping ratio, a relational expression between sprung mass vibration displacement and road surface vibration displacement and a relational expression between sprung mass vibration acceleration and road surface vibration displacement are generated; 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. The first vibration characteristic value includes a sprung vibration acceleration ratio and a sprung vibration displacement ratio of the vehicle.

5. The method according to claim 1, characterized in that The method of mathematically modeling the hydraulic bushing to generate a second Kelvin model includes: The hydraulic bushing is equivalent to a sprung mass block, a hydraulic bushing spring, a hydraulic bushing damper and a wheel for mathematical modeling to generate a second Kelvin model, wherein in the second Kelvin model, the sprung mass block is respectively connected to the hydraulic bushing spring and the hydraulic bushing damper, 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 the first displacement, and the vertical displacement of the wheel is the second displacement.

6. The method according to claim 5, characterized in that The second modeling data includes: a stiffness coefficient of the hydraulic bushing spring and a damping coefficient of the hydraulic bushing damper.

7. The method according to claim 6, characterized in that Generating a second vibration characteristic value based on the second modeling data and the first vibration characteristic value includes: Substitute the stiffness coefficient of the hydraulic bushing spring and the damping coefficient of the hydraulic bushing damper into the acquired 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 a second vibration characteristic value, which includes the sprung vibration acceleration ratio and the sprung vibration displacement ratio of the hydraulic bushing.

8. A vibration characteristic analysis device for a hydraulic bushing, characterized in that: include: A first modeling module, used for mathematically modeling the vehicle and generating a first Kelvin model; A first acquisition module, used for acquiring first modeling data of the first Kelvin model; A first generating module, used for performing calculation according to the first modeling data to generate a first vibration characteristic value; A second modeling module is used for mathematically modeling the hydraulic bushing to generate a second Kelvin model; A second acquisition module, used for acquiring second modeling data of the second Kelvin model; The second generating module is used to generate a second vibration characteristic value based on the second modeling data and the first vibration characteristic value.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the vibration characteristic analysis method of the hydraulic bushing according to any one of claims 1 to 7.

10. A computer device comprising a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, characterized in that: When the program instructions are loaded and executed by the processor, the steps of the vibration characteristic analysis method of the hydraulic bushing described in any one of claims 1 to 7 are implemented.

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