The Experimental Analysis and Parameters Influence Study on Dynamic Characteristics of Radial Hydraulically Damped Bushing

Abstract

Radial hydraulically damped bushing (RHDB) is widely used as vibration isolator in vehicle chassis system. In this paper, new experimental process and data used to measure and describe dynamic behaviors of a RHDB are presented and discussed. Furthermore, a lumped-parameter (LP) model for calculating dynamic performances of a RHDB with one inertial track is proposed. Finally, influences of lumped-parameters on dynamic performances of a RHDB are carried out using the LP model. It is found that dynamic characteristics of a RHDB are most sensitive to equivalent pumping area of rubber spring, and are significantly influenced by its volume stiffness with high excitation frequencies above 25 Hz. But only the peak values of dynamic stiffness and loss angle are significantly affected by inertial coefficient and linear resistance of inertial track fluid.