The Lower Bound of the Stability Threshold Speed of a Flexible Rotor System in Fluid-Film Bearings

[+] Author and Article Information
Wen Zhang

Department of Applied Mechanics, Fudan University, Shanghai, People’s Republic of China

J. Vib., Acoust., Stress, and Reliab 111(3), 351-353 (Jul 01, 1989) (3 pages) doi:10.1115/1.3269864 History: Received September 01, 1985; Online November 23, 2009


The paper is devoted to the estimation of the lower bound of the stability threshold speed (STS) of a flexible rotor system supported in fluid-film bearings. It is proved theoretically that the STS of any multi-degree-of-freedom flexible rotor system is always higher than the STS of the corresponding equivalent single disk rotor. The conclusion offers us a simple approach to estimate the STS of any actual rotor system and provides a theoretical foundation for the approach.

Copyright © 1989 by ASME
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