碰摩转子的弯曲和扭转振动分析

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。

Coupled Bending and Torsional Vibrations Due to Rotor-to-Stator Contacts

A new Rotor to Stator contact model is well developed,which consists of a rotor with two discs mounted on a massless shaft and a stator.This model is used to describe the bending/torsion coupled vibrations of a rotor and an elastic stator due to the contact.The model is suitable to simulate full annular rubs,partial rubs and also the heavily destructive dry friction whip when the rotor rolls on the stator's inner surface.The numerical calculations show a variety of rotor orbit figures due to the different types of contacts and reveal the significant influences of all system parameters on the rotor behaviour.The rotor stator contact problem can be detected by monitoring the torsional vibration signals.