滚动轴承非线性因素对转子系统振动特性的影响

针对滚动轴承支承下的转子系统在运行过程中存在的滞后突跳问题，利用嵌入同伦弧长延拓的HB-AFT方法，可以快速计算在滚动轴承支承下转子系统的滞后突跳区间;利用Floquent理论进行稳定性判定，分析轴承等效刚度、轴承游隙与线性阻尼系数对转子系统滞后突跳的影响.结果表明:轴承游隙与轴承等效刚度在一定范围内变化会影响转子系统的滞后突跳区间，而阻尼系数只在转子系统临界转速附近影响系统振动的幅值.研究结果可为轴承-转子系统参数的选取提供理论参考.

Influence of Nonlinearity Factors of Rolling Bearings on Vibration Characteristics of Rotor System

Aiming at the hysteresis jump of a rotor system supported by rolling bearings during operation， by using the HB-AFT method embedded in the homotopy arc extension， the interval of the hysteresis jump of the rotor system supported by rolling bearings can be quickly calculated. The Floquent theory is used to determine the stability， and the effects of bearing equivalent stiffness， bearing clearance and linear damping coefficient on the hysteresis jump of the rotor system are analyzed. The results show that the variation of bearing clearance and bearing equivalent stiffness within a certain range will affect the hysteresis jump range of the rotor system， and the damping coefficient only affects the system’s vibration amplitude near the critical speed of the rotor system. The results of the study provide a theoretical reference for setting the bearing-rotor system parameters.