Research on a rigid rotor-sliding bearing system with a squeeze film damper

Abstract

In this paper, a dynamic model on a rigid rotor-sliding bearing system with a SFD is established. The stability and bifurcation behaviors of the system are studied. On the basis of the differential equations of fluid momentum and mass continuity, the distribution pressure function is derived by taking oil film inertia force into consideration. Damping force, clearance excitation force, interference force of different frequencies and static load are also considered in the model. Finally, the governing equations of the stability and bifurcation behaviors of the system are solved by Floquet theory. Simulation of dynamic model shows that the rigid rotor-sliding bearing system can maintain stability and exhibit a Hopf bifurcation phenomenon in a certain range.