EFFECT OF MATERIAL DAMPING CHARACTERISTICS ON DYNAMIC ANALYSIS OF ROTOR-BEARING SYSTEMS

摘要

Dynamical behaviour of rotor-bearing systems is significantly influenced by a large number of parameters related to rotor, disk and bearing. However, inherent material damping parameters of rotor play an important role on dynamic characteristics of rotor-bearing systems. Conventional transfer matrix method is modified by incorporating viscous and hysteretic form of internal damping parameters of rotor in the analysis. A three-disks rotor system mounted on rigid supports as well as on flexible bearings is taken as a physical model to demonstrate the effects of damping on dynamic characteristics of the system. The viscous damping of the rotor system diminishes the dynamic response where as the hysteretic form of damping always destabilises the system.