ABSTRACT
The interference fit between the journal bearing and the housing could reduce the bearing’s vertical clearance. However, its effect on the nonlinear vibration, such as Hopf bifurcation type, has not been rigorously discussed. This paper presented the effects of the reduced bearing vertical clearance on the nonlinear vibration under various rotor parameters, such as disk mass and position. Model reduction by component mode synthesis, shooting method with parallel computing, arclength continuation, and Floquet multiplier analysis were implemented to efficiently obtain the limit cycles and their stability of the nonlinear rotor-bearing system. The experiment was performed to verify the calculation results.
