Research on Friction-induced Vibration of Wet Clutch Engagement

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (9) : 117-122.

YANG Li-kun, LI He-yan, MA Biao

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Abstract

The characteristics of friction-induced vibration of wet clutch engagement are investigated based on a four-degree-of-freedom dynamic model. The steady-state nonlinear LuGre friction model is employed. Stability analysis is performed by applying eigenvalue method and numerical simulation for the dynamic model is conducted in MATLAB/Simulink. The results demonstrate that negatively sloped friction coefficient with sliding velocity and the fluctuation of interface pressure both contribute to clutch judder. It also indicates that clutch judder will get intense with more difference between static and kinetic coefficients of friction, and less difference between the frequency of pressure fluctuation, and the inherent frequency of the unstable mode when the instability occurs. Load excitation has a similar effect on clutch judder with interface pressure fluctuation.

Key words

clutch judder / negatively sloped friction coefficient / contact pressure fluctuation / load excitation

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YANG Li-kun, LI He-yan, MA Biao. Research on Friction-induced Vibration of Wet Clutch Engagement[J]. Journal of Vibration and Shock, 2016, 35(9): 117-122

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