气体轴承-转子系统典型振动特性分析

摘要

给出了单跨、气体轴承支承的转子系统中出现的共振、气膜半速涡动（包含临界半速涡动）、双低频特性、气膜振荡、工频碰磨、低频碰磨等典型振动现象，采用轴心轨迹，分岔图，以及频谱图等振动测试分析方法，呈现了以上典型振动现象的动力学特征，为识别气体轴承中的典型振动现象提供试验数据支持；同时，针对以上典型振动特征，采用轴承-转子系统的载荷运动平衡方程，给出了定性的理论分析以及相应的控制方法，为气体轴承-转子系统的振动控制与稳定性研究提供可借鉴的数据和方法。%Typical vibration characteristics for resonance,half-speed whirl(critical half-speed whirl),double low fre-quencies,gas whip,power frequency rubbing and low frequency rubbing were given under gas bearing-rotor system for a single span.Typical vibration characteristics as mentioned above were analyzed by axis center tracks,bifurcation and spec-tral analysis.Qualitative theoretical analysis and corresponding vibrational controlling methods were discussed with equation of motion for bearing-rotor system,which provides vibration controlling methods and typical vibrational data for gas bearing-rotor system stability study.