中文摘要：

该文以一个单跨双盘柔性转子系统为研究对象，建立转子系统的有限元模型。基于接触动力学理论，将转子和定子简化为一个点点接触单元，二者通过碰摩力进行耦合，采用增广的拉格朗日方法来处理接触约束条件，采用库仑摩擦模型来模拟转定子之间的摩擦。研究了不同转速对定点碰摩转子系统动力学特性的影响，并与实验结果进行了定性验证。研究结果表明，随转速升高系统出现了不同的运动形式，如周期1、周期2、周期3和周期4。

英文摘要：

Taking a single span flexible rotor system with two discs as the research object, the finite element model of the rotorbearing system was established. By simplifying one disc and its corresponding stator as two contact points and establishing pointpoint contact element to simulate rotor-stator rubbing, the rotor and stator model were coupled by contact force. By adopting the augmented Lagrangian method to deal with contact constraint conditions and coulomb friction model to simulate rotor-stator frictional characteristics, the responses of the rotor system with rubbing were analyzed under four typical cases with different rotating speeds. The simulation results were further compared with experiment results. The results show that different rotor motions appears such as period-one motion （P1）, P2, P3 and P4, with the increasing rotating speeds.