摘要
利用修正的短轴承理论模型对转子 -轴承系统在各种转速和不平衡量的情况下进行了理论与数值分析 .结果表明 :在某些条件下 ,转轴系统有可能产生倍周期分岔、拟周期分岔并出现混沌振动 .倍周期分岔和拟周期分岔会使转轴产生交变应力 ,从而对转轴的运行不利 ;同时 ,倍周期分岔和拟周期分岔都是通向混沌的道路之一 ,产生混沌振动时转子的运动是无序、不可预测和不稳定的 。
The nonlinear dynamic behavior of an actual rotor-bearing system was analyzed with the modified short bearing approach method for various kinds of rotor speeds with various kinds of unbalance. The results show that the double period bifurcation, quasi-period motion and chaotic motion can be found under some condition. When the period bifurcation or quasi-period motion occurs, the cyclic stress may be found in rotors. Also, the double period bifurcation and quasi-period motion are routes to the chaotic motion. The chaotic motion of the rotor is characterized by orbits that alternate between small and large ones in an unpredictable and disordered manner.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第5期771-773,共3页
Journal of Shanghai Jiaotong University
基金
中国博士后基金资助项目
