• CN：11-2187/TH
• ISSN：0577-6686

›› 2002, Vol. 38 ›› Issue (9): 27-32.

• 论文 •

### 非线性油膜力轴承上不平衡弹性转子的稳定裕度

1. 天津大学机械工程学院;南京电力自动化研究院
• 发布日期:2002-09-15

### STABILITY MARGIN OF UNBALANCE ELASTIC ROTOR IN SHORT BEARINGS UNDER A NON-LINEAR OIL-FILM FORCE MODEL

Li Yinshan; Chen Yushu;Xue Yusheng

1. Tianjin University Nanjing Automation Research Institute
• Published:2002-09-15

Abstract: The stability and the stability margin of an elastic rotor supported by short journal bearings is discussed, focusing particular attention on its nonlinear aspects. A more reasonable nonlinear unsteaby oil-film force model, which is determined only by three functions, is adopted and the explicit analytical formula of oil-film force for short journal bearing is used for bifurcation and chaos stuby. The extended phase area stability criterion by trajectory-reduction-coupling in high dimensional nonlinear systems, which has got an extensive application in power system stability, is creatively introduced to nonlinear rotor system, A quantitative criterion of nonlinear rotor system stability is presented, which is called CPAC (Comparative positive-area criterion), The definition of stability margin is introduced, A quantitative example on rotor system stability is given by CPAC.