文献类型：期刊文献

英文题名：On the bifurcation of periodic motion of rotor system with rub-impact and oil fault

作者：Liu, Chang-Li[1]; Xia, Chun-Ming[1]; Zheng, Jian-Rong[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：2008

卷号：27

期号：5

起止页码：85

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

收录：EI(收录号：20082611337644)

语种：英文

外文关键词：Algorithms - Bearings (machine parts) - Dynamic models - Friction - Hopf bifurcation - Impact resistance - Lubricating oils - Stability - Stators

摘要：Based on the nonlinear dynamic model of the rotor-bearing system with rub-impact and oil fault, the bifurcation and stability of the periodic motion of the system in unbalance-rotating speed and clearance-rotating speed parametric domains are studied by use of continuation-shooting algorithm for periodic solutions of nonlinear non-autonomous dynamics system. The results obtained are compared with those of rotor-bearing system with oil whirl fault. The following conclusions are drawn: the occurrence and aggravation of rub-impact have the bifurcation changing from doubling bifurcation to Hopf bifurcation when the unbalance is small. The rub-impact delays the occurrence of oil whirl and makes the critical speed increase. The critical speed does not change when the rotor/stator clearance is large because the oil whirl occurs before rub-impact.