Influences of Structural and Friction Parameters on Transformation of Contact State in Friction-Induced Vibration

Abstract

To investigate the effects of friction operation conditions and vibration system parameters on the friction states transformation during vibration, the friction-induced vibration (FIV) mathematical model of a single-degree-of-freedom (SDOF) system in the direction of friction is introduced. The vibration response is solved by an iterative method combining kinematics and vibrology. The velocity and direction changes of the friction force caused by the sliding of the moving plate on top of the mass will lead to the ‘rebound’ phenomenon and the transformation of contact states. Numerical simulation and parameter studies were used to investigate the effects of stiffness constant, mass, normal force, velocity, damping ratio, and friction coefficient on the conversion of friction state, vibration response, and friction history. The numerical results show that the time of mass block and plate staying on stick status increases with normal force, static friction coefficient, the delay rate of relative sliding velocity control coefficient, and decreases with the increment of stiffness, velocity, mass, the lower limit of static friction coefficient and damping ratio. In the absence of general quantitative definitions and conclusions, the trend of this paper is to show the change of friction state during FIV through an accurate physical system.