Nonlinear Dynamic Behaviors of Rotor System with Misaligned Journal Bearings

摘要：

　　The dynamic modeling of a rotor system on misaligned journal bearings is discussed and its nonlinear dynamic behaviors are considered in this paper.Firstly,a dynamic model of six degrees of freedom system is established under the conditions of the long bearings,small bearing misalignment and mass unbalance.Then,the nonlinear dynamics of the rotor-bearing system,such as the displacement response and its frequency spectrum,rotor orbit and its Poincare map are analyzed by the Runge-Kutta method.The results show that at low speed the steady-state responses of the rotor system in lateral direction is synchronous,as the speed increases a serious of bifurcation phenomena and chaotic oscillations occur.In many cases,there exist the integer multiples components of the rotating speed except the synchronous one in displacement responses.

关键词： Rotor Bearing misalignment Oil film forces Nonlinear characteristics

作者: Li Ming Li Zigang Xue Ping

作者单位: Department of Mechanics, Xian University of Science and Technology, Xian 710054, China State Key Laboratory of Strength and Vibration for Mechanical Structures(Xian Jiaotong University), School of Computer Science, Xian University of Science and Technology, Xian 710054, China

会议类型: 国际会议

会议名称: 3rd International Conference on Frontiers of Manufacturing and Design Science(第三届制造与设计科学前沿国际会议(ICFMD))

会议地点: 香港

会议语种:英文

页码: 1032-1038

在线出版日期: 2012-12-11（万方平台首次上网日期，不代表论文的发表时间）