Effects of material characteristics and clearance size on dynamics of a slider-crank mechanism with two sliders and revolute clearance joints

摘要

This article presents influences of clearance size and material parameters on the dynamic response of a slider-crank mechanism with imperfect revolute joints in dry contacting condition.The mechanism was created by Solidworks and a finite element method in ANSYS software was used to analyze the effects which presented and discussed.The simulation results revealed that the acceleration of two sliders was obviously shaking with high peaks when the clearance size equal to 0.3 mm which differ from the ideal joint.Moreover,the smaller Young’s modulus material of journals indicated the significant effects on acceleration of mechanical systems.The reasons are due to a suddenly increase of contact force when the journal impacted into the bearing in imperfect revolute joints.The simulation results for the clearance size equal to 0.1 mm,0.2 mm and 0.4 mm were close to an ideal joint.It demonstrated that clearance size and material characteristic played an important role in dynamics analysis of mechanical systems.