Dynamic Behavior of Four-bar Mechanism with Three-dimensional Clearance and Wear

Abstract

Because of machining tolerance as well as wear, joint clearances are inevitable in multibody systems. It can seriously degrade the dynamic performance of connected parts and significantly increase the operating noise. Most of previous studies about clearance joints were conducted on planar multibody systems, but actually the relative motion of journal and bearing includes radial and axial component. Therefore, the wear of joint is also three-dimensional. The influence of different spatial clearances on the dynamic response of multibody system is studied with a four-bar mechanism as the research object. In addition, in the ABAQUS/Standard environment, wear behavior of three-dimensional clearance joint is simulated and the spatial shape of contact surface after wear is obtained.