转子—轴承系统混沌运动的研究

对转子—轴承系统的混沌运动进行动力学研究 ,采用非线性油膜力数据库方法获得椭圆轴承的非线性油膜力 ,数值计算得到了系统在某些参数域中的分叉图、轴心轨迹、相图、Poincar映射、时域波形和频谱图 ,直观显示了系统发生混沌运动的性态 ,用李雅普诺夫指数对混沌运动时的时间序列进行了判断 ,为控制转子系统混沌运动的发生及动力学设计提供了理论基础

Study on chaotic motion of a rotor-journal bearings system

The dynamic behavior of a rotor-journal bearing system was studied,the nonlinear fluid film forces of the elliptical journal bearings were obtained by using the database method.And in some typical parameter regions the bifurcation diagrams,the time histories,the shaft centerline orbit,phase portrait the Poincar maps and the frequency spectrums of the system are acquired with numerical integral method.The Lyapunov spectrum is used to determine whether the time series is in a state of chaos motion.The analysis result of this paper provides the theoretical base for controlling the chaotic motion and designing of this system.