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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Synchronous Dynamics of a Coupled Shaft/Bearing/Housing System With Auxiliary Support From a Clearance Bearing: Analysis and Experiment

[+] Author and Article Information
J. L. Lawen, G. T. Flowers

Auburn University, Auburn, AL 36849

J. Eng. Gas Turbines Power 119(2), 430-435 (Apr 01, 1997) (6 pages) doi:10.1115/1.2815593 History: Received February 22, 1995; Online November 19, 2007

Abstract

This study examines the response of a flexible rotor supported by load sharing between linear bearings and an auxiliary clearance bearing. The objective of the work is to develop a better understanding of the dynamic behavior of a magnetic bearing supported rotor system interacting with auxiliary bearings during a critical operating condition. Of particular interest is the effect of coupling between the bearing/housing and shaft vibration on the rotor-dynamic responses. A simulation model is developed and a number of studies are performed for various parametric configurations. An experimental investigation is also conducted to compare and verify the rotor-dynamic behavior predicted by the simulation studies. A strategy for reducing sychronous shaft vibration through appropriate design of coupled shaft/bearing/housing vibration modes is identified. The results are presented and discussed.

Copyright © 1997 by The American Society of Mechanical Engineers
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