摘要
非线性油膜力数据库方法获得非圆滑动轴承的非线性油膜力 ,利用 Runge-Kutta法、Poincaré映射和频谱图对刚性 Jeffcott转子—椭圆轴承系统在较宽参数范围内的分叉和非线性动力学行为进行研究。得到了系统在某些参数域的分叉图、时间历程、频谱图、相图、Poincaré映射图。研究结果表明 :在特定参数范围内系统存在倍周期分叉、Hopf分叉、解的跳跃、K-T周期解、概周期运动和混沌运动等非线性动力学行为。非线性油膜力数据库方法获得的非线性油膜力能准确揭示转子—椭圆轴承系统丰富的非线性动力学行为 。
The nonlinear dynamic bifurcation behavior of a rigid Jeffcott rotor-non-circular bearing system was investigated in a wide rang of parameters based with the help of Runge-Kutta method,Poincaré map and frequency spectrum.The journal bearing oil film forces were obtained from database.The diagrams of bifurcation,time course,frequency spectrum,phase and Poincaré map diagrams with some typical system parameters were numerically worked out.The results show that there exist abundant nonlinear dynamic behaviors such as double-period bifurcation,Hopf bifurcation,jump phenomenon,K-T periodic solution,quasi-periodic and chaotic motions and so on.The database method can provide the journal bearing oil film forces accurately and effectively for nonlinear dynamic analysis of rotor-non-circular bearing system.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2000年第4期413-418,共6页
Journal of Aerospace Power
基金
国家自然科学基金! (重大 )资助项目 (19990 5 10 )
黑龙江省自然科学基金资助项目
