Friction-induced vibration of marine propeller shaft based on the LuGre friction model

摘要

The friction-induced vibration with stick-slip behavior is caused by the contact of the shaft-bearing system. A LuGre friction model is thus applied in the investigation of friction-induced vibration of the marine propeller shaft. The model parameters contain Coulomb friction, stiction force, Stribeck velocity and viscous coefficient are obtained through fitting curves of friction with experimental data in published papers. The dynamical response of a marine propulsion system is measured with an experiment and calculated with the Stribeck model to verify the adaptation of the LuGre friction model in the friction-induced vibration. To capture the nature of the LuGre friction model, the velocity-dependent function, friction coefficient, pre-sliding displacement, hysteresis, break-away force and dynamical response are numerically calculated. The impact factors include relative velocity, tangential force, and rotational speed are discussed with specific comparison. Therefore a suitable model focusing on the friction-induced vibration is proposed for the marine propeller shaft.

关键词