电磁轴承-转子系统的非线性动力学行为分析  

Research on the Nonlinear Dynamic Behavior of Electromagnetic Bearing-Rotor System

作　　者：吕宁[1] 李晶[1] 孟祥雪[1] 张转周[1] 

机构地区：[1]兰州交通大学,兰州730070

出　　处：《重庆理工大学学报（自然科学）》2012年第12期99-102,共4页Journal of Chongqing University of Technology：Natural Science

摘　　要：在考虑非线性碰摩力的基础上,以电磁轴承-转子系统为动力学模型,并对模型进行了无量纲化,用Runge-kutta法对该系统由非稳态油膜力和非线性碰摩力耦合引起的非线性动力学行为进行了数值仿真,得到了该系统随动摩擦因数、系统刚度比、质量偏心量比等参数变化引起的混沌特性,发现该系统在运行过程中存在周期运动、概周期和混沌等丰富的非线性现象。On the basis of considering the nonlinear rubbing force,and based on the dynamics model of electromagnetic bearing-rotor system,the model has been made dimensionless.For nonlinear dynamic behavior of the system,which is caused by unsteady oil film force and nonlinear rubbing force coupling,numerical simulation with Runge-kutta method has been adopted.The chaotic characteristics such as the friction factor,system stiffness ratio,quality of eccentricity ratio and so on,caused by parameter changes,are obtained.In the system running,we find that rich nonlinear phenomena like periodic motion,periodic and chaotic exist in the system.

关 键 词：电磁轴承-转子系统 非线性动力学 碰摩力 分岔 混沌 

分 类 号：TH132[机械工程—机械制造及自动化]