文献类型：期刊文献

英文题名：Study on bifurcation of periodic motion of rotor system with crack and oil whirl fault

作者：Liu, Changli[1]; Xia, Chunming[1]; Zheng, Jianrong[1]; Wen, Bangchun[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：2008

卷号：28

期号：1

起止页码：35

外文期刊名：Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis

收录：EI(收录号：20082011255926)

语种：英文

外文关键词：Cracks - Failure (mechanical) - Hopf bifurcation - Lubricating oils - Rotating machinery - Rotors - Stability

摘要：The bifurcation and stability of the periodic motion of a rotor-bearing system with crack and oil whirl are investigated by the continuation-shooting method for the periodic solution of nonlinear and non-autonomous system. The following conclusions are drawn: the rotor with an oil whirl fault has the same discipline of bifurcation as the rotor with a coupling fault of crack and oil whirl in the unbalance-speed range. When the unbalance is high or low, the periodic motion of systems loses stability by the doubling bifurcation, and the periodic motion of systems loses stability by the Hopf bifurcation when the unbalance is moderate. In the crack depth-speed range, the periodic motion and double periodic motion of the rotor with the coupling fault have the same way of bifurcation. The stability of periodic motion of system becomes weaker when the crack is deeper, but the variety of stability is not obvious.