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Numerical analysis of stability margin for nonlinear vibration elastic rotor-bearing system
Author(s): 
Pages: 39-44
Year: Issue:  6
Journal: Gas Turbine Experiment and Research

Keyword:  旋转机械转子-轴承系统加速度-位移扩展相平面非线性稳定裕度分岔失稳转速质量偏心;
Abstract: 基于互补群群际能量壁垒准则量化理论,提出了轨迹加速度-位移扩展相平面稳定裕度分析法,从理论分析、数值计算两方面验证了该方法的正确性.建立了采用Capone圆轴承非线性油膜力模型的弹性转子-轴承系统模型,并用数值积分和庞加莱映射方法,得到系统在某些参数域中的分岔图、轴心轨迹图、庞加莱映射图、时间历程图和频谱图,得出分岔失稳速度随质量偏心的变化规律:分岔速度随质量偏心的趋势是先减小后增大,拟合曲线符合三次高斯公式,拟合精度达0.998 2.数值分析结果为该类转子-轴承系统的设计和安全运行提供了理论参考.
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