当工作点越过稳定性边界时，低频不稳定的振幅逐渐消失。
As the operating point crosses over the stability boundary, the chug amplitude disappears.
应用常微分方程定性方法，得到了正平衡点的全局稳定性和非小振幅极限环的存在唯一性的充分条件。
By using the qualitative methods of ODE, the positive equilibrium's global stability and existence and uniqueness of non-small amplitude stable limit cycle were obtained.
得到了复合材料传动轴比钢、铝合金传动轴运动稳定性好、主共振的振幅小等结论。
Conclusions of that the motion stability of a fiber composite drive shaft is better and the main resonance amplitude is smaller than that of a drive shaft of steel or aluminum are produced.
分析了主共振的振型、最大振幅、稳定性和振幅突变性。
The shapes, maximum amplitude, stability and amplitude jump of main resonance are analyzed.
算例表明，随着杆件初弯曲的增大，其振幅值随之成比例增大，而其动力稳定性随之降低。
The calculating sample shows that along with the increase of bars' initial bending, the value of their amplitude increases proportionally and their dynamic behavior decreases.
传动轴主共振的最大振幅、稳定性、振幅突变性是其主要特性。
The maximum amplitude, stability and amplitude jump of main resonance describe the primary characters of a drive shaft.
文章重点研究了较高振幅振动柱的锁定现象、波动升力与柱位移之间的相位变化，讨论了方柱涡激振荡、驰振和气动稳定性问题。
This study aims at investigating the lock-in phenomenon, fluctuating lift and the phase shift between fluctuating lift and displacement of the oscillating cylinder.
分析了主共振的振型、最大振幅、稳定性和振幅突变性。
The maximum amplitude, stability and amplitude jump of main resonance describe the primary characters of a drive shaft.
研究了系统的稳定性条件和发生分岔的条件，提出了通过改变参数来提高系统稳定性和抑制振幅的方法；
The stability and bifurcation condition of rotor system are obtained and the way to improve system stability and reduce the vibration amplitude through adjusting system parameters is indicated;
研究了系统的稳定性条件和发生分岔的条件，提出了通过改变参数来提高系统稳定性和抑制振幅的方法；
The stability and bifurcation condition of rotor system are obtained and the way to improve system stability and reduce the vibration amplitude through adjusting system parameters is indicated;
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