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Rubber bush model

A rubber bushing and model technology, which is applied in the direction of instruments, electrical digital data processing, mechanical equipment, etc., can solve the problems of unable to reflect the switching between static friction and dynamic friction

Inactive Publication Date: 2015-11-04
JILIN UNIV
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  • Application Information

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Problems solved by technology

[0021] The purpose of the present invention is to provide a rubber bushing model, which aims to solve the problem that the existing model cannot reflect the switching between static friction and dynamic friction

Method used

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Embodiment Construction

[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0061] A rubber bushing model such as image 3 , 4, 5, it is formed by parallel connection of four units of nonlinear spring 1, pure damping 2, Maxwell model and ASCL friction model; the Maxwell model is formed by nonlinear spring 3 and pure damping 4 in series; the ASCL friction model The Kelvin-voigt model composed of a nonlinear spring 5 and a pure damper 6 connected in parallel and a friction element 7 connected in series; where the bearing capacity of the bushing F b The relationship between (t) and the amount of deformation x(t) is as follows:

[0062] F b ...

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Abstract

The present invention provides a rubber bush model. The rubber bush model is formed by connecting the following four units in parallel: a nonlinear spring, a pure damper, a Maxwell model and an ASCL friction model, wherein the Maxwell model is formed by connecting another nonlinear spring and another pure damper in series; the ASCL friction model is formed by connecting a Kelvin-voigt model, which is formed by connecting another nonlinear spring and another pure damper in parallel, and a friction element in series; and finally, a function relationship between a carrying capacity of a bush and a deformation amount is established according to the model structure. The rubber bush model provided by the present invention is capable of expressing a nonlinear characteristic and a hysteresis characteristic of the rubber bush, so that dynamics modeling accuracy and emulation fidelity of a whole vehicle are improved, amplitude dependence and frequency dependence of the rubber bush can be relatively well emulated, a nonlinear transient characteristic of the rubber bush can be relatively well emulated, and switching between static friction and dynamic friction can be relatively well reflected.

Description

technical field [0001] The invention belongs to the field of dynamic simulation modeling, in particular to a rubber bushing model. Background technique [0002] The rubber bushing is an important part of the car chassis, which plays a role in connecting the various parts of the car body and transmitting the vibration of the chassis to the car body. During use, many factors will affect the dynamic mechanical properties of rubber bushings, such as excitation frequency, amplitude, and preload. Under the influence of these factors, the rubber bushing exhibits complex mechanical characteristics, such as nonlinear characteristics of variable stiffness and variable damping. Commonly used multi-body dynamics simulation software, such as ADAMS, Recurdyn, DADS, etc., usually use the Kelvin-Voigt model (such as figure 1 shown) or Maxwell model (such as figure 2 shown) to simulate a rubber bushing. [0003] Among them, the differential equation of the Kelvin-Voigt model is: [000...

Claims

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Application Information

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IPC IPC(8): G06F17/50F16F1/36
Inventor 管欣金耿日郭睿冯保进
Owner JILIN UNIV
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