液阻型橡胶隔振器非线性特性仿真分析

Nonlinear Modeling and Analysis of Hydraulically Damped Rubber Mounts

液阻型橡胶隔振器是汽车动力装置等系统的先进隔振元件。该文以惯性通道 -活动解耦盘式液阻悬置为研究对象 ,建立了非线性动力学特性仿真分析的线性与非线性集总参数模型 ,重点探讨了模型中一些重要物理参数的识别方法。对 BUICK轿车动力总成惯性通道 -解耦盘式液阻悬置的动特性进行仿真 ,并与实验值进行对比分析 ,计算了该液阻悬置在不同的激振工况下 ,一些特征参数变化的规律 ,结果与液阻悬置的工作机理或实验值吻合。

Hydraulically damped rubber mount (HDM) is a kind of advanced vibration isolator for automotive powerplants and other dynamic systems. In this paper, linear and nonlinear models with lumped mechanical and fluid elements for dynamic characteristic analysis of a HDM with an inertia track and a free decoupler are proposed. Special emphasis is placed on the identification of the system parameters of a lumped model. A computer simulation for a HDM used in BUICK car powertrain is performed, and the results are compared with experimental data. The time history of some variables in the lumped model, such as pressure in upper chamber, displacement of the decoupler and volume flow in inertia track and around the decoupler, are also calculated under different excitations. The results are in consistent with the mechanism of the HDM or in agreement with the experimental data. The modeling method presented in this paper is instructive to research and development of HDM.