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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,通过转定子间的圆形间隙变化来模拟转定子的分离及整周接触,并通过碰摩力耦合转定子模型,采用增广的拉格朗日方法处理接触约束条件,用库仑摩擦模型模拟转定子之间摩擦,考虑不同转速、转定子间隙、转定子法向接触刚度、阻尼和摩擦系数对转子系统动力学特性的影响。研究结果表明:转速和转定子法向接触刚度对系统响应影响最大,转定子法向接触阻尼和摩擦系数次之,转定子间隙影响最小。
A finite element model of a rotor system is established with a single-span double-disk flexible rotor system as a research object. Based on the contact dynamics theory, the rotor and stator are simplified into a point-point contact unit. By changing the circular clearance between the stator and the stator Simultaneously, the stator is separated and touched by the whole cycle. The coupled Lagrange method is used to deal with the contact constraints through the coupling of the friction force. The friction between the stator is simulated by the Coulomb friction model. Considering different rotation speeds, The Influence of Stator Clearance, Normal Contact Stiffness of Rotor, Damping and Friction Coefficient on Dynamic Characteristics of Rotor System. The results show that the rotation speed and the normal contact stiffness of the stator have the greatest influence on the system response. The normal contact damping and the friction coefficient of the stator are the second, and the influence of the stator clearance is the least.