The results show that the double period bifurcation, quasi periodmotion and chaotic motion can be found under some condition.
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。
2
Stiffness change has little effect on the critical instability and motion of the cracked-rotor, and the system motion is quasi-periodmotion.
裂纹转子轴刚度变化对油膜失稳点及油膜失稳之后转子的运动影响不大，转子系统作拟周期运动。
3
Furthermore, prior to earthquakes, lake -water can amplify the abnormal features of crustal deformation, long-periodmotion and earth gas, it is one of the methods in sho...