轴向摩擦转子的弯扭耦合振动分析

Vibration Analysis of a Two-disc Rotor-stator System with Axial Rubs

推导了圆盘与封严圈之间的轴向碰撞力和摩擦力计算公式,并根据力矩相等原则,建立考虑轴向碰摩的单跨双盘转子-静子的弯扭耦合振动方程。采用数值方法,计算分析轴向摩擦对转子运动的影响。研究表明,轴向摩擦导致系统出现多周期和混沌的横向运动,而圆盘扭转运动则能够较直接地反映轴向摩擦的严重程度。

The calculation models of the axial contact torce and the Inction Iorce among the alscs and sealing flanges of the stator were deduced. The axial contact forces were converted into the radial forces based on the equivalent moment rule. Then lateral--torsional coupling vibration equations of a single--span--two--disc rotor--stator system were established with consideration of the axial rubs. The results show that when axial rubs happen, the transverse motion of the system can be multiple-- periodic and chaotic. The severity of axial rubs can be reflected directly by the torsional motion of the disks.