Steady-State Dynamic Behavior of a Flexible Rotor With Auxiliary Support from a Clearance Bearing

Abstract

This paper investigates the steady-state responses of a rotor system supported by auxiliary bearings in which there is a clearance between the rotor and the inner race of the bearing. A simulation model based upon the rotor of a production jet engine is developed and its steady-state behavior is explored over a wide range of operating conditions for various parametric configurations. Specifically, the influence of rotor imbalance, clearance, support stiffness and damping is studied. Bifurcation diagrams are used as a tool to examine the dynamic behavior of this system as a function of the aforementioned parameters. The harmonic balance method is also employed for synchronous response cases. The observed dynamical responses is discussed and some insights into the behavior of such systems are presented.

Investigation on effect of joint clearance on dynamics of four-bar mechanism

“…A four-bar mechanism was implemented as an example and Lagrangian approach was used to model the motion of a rocker arm pin at the ground connection. The effect of joint clearance in planar problems without treating the effect of lubrication was discussed by Xie et al [14]. Bifurcation diagrams were used as a tool to investigate the dynamic behavior of system.…”

Bifurcation on synchronous full annular rub of rigid-rotor elastic-support system

“…The elastic rotor-to-stator model was also widely used in rotor-auxiliary bearing interaction system. Large numbers of researches were made by Xie et al [38] , Cole [39] , Keogh and Cole [40] , and Sahinkaya et al [41] in this field.…”

Dynamic simulation of a flexible spinning vehicle with the periodic varying thrust

“…Mingori, et al have shown the stability of spin rocket under the internal mass motion and axial thrust [4] . Xie, et al have analyzed the dynamic behavior of a flexible jet rotor with the auxiliary support from a clearance bearing [5] .…”