Simulation of Multipoint Annular Rubbing Fault for a RotorStator System

doi:-

Abstract

Abstract: The dynamic model for a flexible rotor system， which considered multipoint annular rubbing， was established using the finite element method based on the contact dynamics. The rotorstator multipoint annular rubbing was simulated using a pointpoint contact element. The effects of penetrating amounts， i. e. ， the difference between the vibration amplitude of the rotator without rubbing and the rotorstator gap， and the stator stiffness on the vibration responses of the system were analyzed under two types of exciting loads. The eccentricity directions of the two discs were the same (case 1) or opposite (case 2). The results show that the rubbing is serious under case 2 than that under case 1， and the stator stiffness has great influence on the rebounding intensity caused by the rotorstator rubbing and on the acceleration responses of the stator.

Key words: multipoint annular rubbing, rotor system, contact dynamics, vibration response, finite element

CLC Number:

TH113

MA Hui， LYU Song， NAI Haiqiang， SONG Rongze. Simulation of Multipoint Annular Rubbing Fault for a RotorStator System[J]. Journal of Northeastern University, 2013, 34(8): 1149-1153.

References

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