文献类型：期刊文献

英文题名：On the bifurcation and stability of periodic motion of rotor-bearing systems with crack and pedestal looseness fault

作者：Liu, Chang-Li[1]; Zheng, Jian-Rong[1]; Zhou, Wei[1]; Wen, Bang-Chun[2]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China

年份：2007

卷号：26

期号：11

起止页码：13

外文期刊名：Zhendong yu Chongji/Journal of Vibration and Shock

收录：EI(收录号：20080111005223)

语种：英文

外文关键词：Dynamics - Hopf bifurcation - Rotors - System stability - Vibration control

摘要：The bifurcation and stability of the periodic motion of rotor-bearing systems with crack and pedestal looseness fault were studied and the periodic solution of nonlinear non-autonomous system was obtained by continuation-shooting method. The following conclusions are drawn; the periodic motion of the rotor loses its stability by doubling bifurcation whether the unbalance in the system is high or low in unbalance-speed range. When the unbalance of the rotor is moderate, the periodic motion of the rotor loses its stability by Hopf bifurcation and the stability is stronger. The stability of periodic motion of the rotor decreases and the region of Hopf bifurcation becomes wider when crack and pedestal looseness exist in the rotor. The results may bring up the theoretical references for security running and vibration control of rotor-bearing systems.