Nonlinear Dynamic Stability and Bifurcation of a Flexible Support-Sliding Bearing-Rotor System
Zhang Yahong(1),Xu Qingyu(1),Zhang Xiaolong(1,2),Xu Qinyuan(1)
(1,Xi'an Jiaotong Unviersity Xi'an 710049) (2,Xi'an Architecture Science and Technical University, Xi'ab 710054)

Abstract: In this paper, the nonlinear dynamic stability and bifurcation characteristics of a nonlinear rotor system with flexible supports and sliding bearings are investigated. The mechanical model of a flexible support-sliding bearing-rotor system is suggested. According to the shooting method and nonlinear oil film force, the period solutions of the rotor system are calculated. Then using Floquet Theory, we determine its stability. Combining Ruge-Kutta algorithm with Poincare mapping method, the orbits of bearing and rotor center are given, then its bifurcation behaviors are discussed.
Keywords: rotor system, flexible support, period solution, stability bifurcation characteristic.