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建立了一个新型多自由度的转子动静碰摩模型。应用该模型 ,重点研究了动、静碰摩引起的转子弯曲和扭转非线性耦合振动。大量的数值计算表明 ,不同碰摩情况下转子具有不同的弯曲和扭转振动响应。转静碰摩激起转子扭转自振频率振动。提出了从转子扭转振动的变化来诊断转静碰摩故障的方法 ,并探讨了此方法的可行性和有效性。
A new multi-degree-of-freedom rotor-and-stator rub-impact model was established. The model is applied to study the rotor bending and torsional nonlinear coupling vibration caused by the dynamic and static rubbing. Numerous numerical calculations show that the rotor has different bending and torsional vibration responses under different rubbing conditions. Rotating static friction stimulate the rotor to reverse the natural frequency vibration. A method to diagnose the rub failure caused by rotor torsional vibration is proposed. The feasibility and effectiveness of this method are also discussed.