Abstract：Rotor may physically contacts with stationary elements of a rotating machine, and the subsequent rubbing at the contact area is a serious malfunction in rotating machinery that may lead to the machine’s catastrophic failure. In the case of considering the shear effect and gyroscopic effect, a finite element model is developed to study the nonlinear dynamic behavior of a double-disk isotropic rotor- bearing system with different rub-impacts in this paper. The influence of some parameters on the operation stability of the rotor-bearing system is discussed. It transpires that the response of the rotor system with axial rub- impact is mainly synchronous periodic motion. When considering the Interaction of axial rub- impact and axial rub- impact, the nonlinear dynamic behavior of the rotor system is more complicated. All the results are in reasonable good agreement with those observed in engineering. The results of this paper could provide certain reference for fault diagnosis and self-healing of large high-speed rotating machinery system, thus ensuring the safe operation of the system.
2012, Vol. 31 
