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

[+] Author and Article Information
H. Xie, G. T. Flowers, L. Feng

Department of Mechanical Engineering, Auburn University, Auburn, Alabama

C. Lawrence

NASA Lewis Research Center, Cleveland, Ohio

J. Vib. Acoust 121(1), 78-83 (Jan 01, 1999) (6 pages) doi:10.1115/1.2893951 History: Received August 01, 1994; Online February 26, 2008


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.

Copyright © 1999 by The American Society of Mechanical Engineers
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