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RESEARCH PAPERS

Linearized ph Stability Theory for Translatory Half-Speed Whirl of Long, Self-Acting Gas-Lubricated Journal Bearings

[+] Author and Article Information
J. S. Ausman

Consulting and Research Staff, Litton Systems, Inc., Woodland Hills, Calif.

J. Basic Eng 85(4), 611-618 (Dec 01, 1963) (8 pages) doi:10.1115/1.3656925 History: Received August 09, 1962; Online November 03, 2011

Abstract

The linearized ph approximation to the time dependent Reynolds equation is solved simultaneously with the equations of motion for a rotating journal shaft supported by a rigidly mounted bearing sleeve. Given the two bearing parameters

Λ = 6μωR2paC2
and
Ω = MCω2πpaDL
a critical operating eccentricity ratio is determined below which the bearing is unstable and above which the bearing is stable. Whirl frequency at the threshold point is computed to be equal to or slightly less than one-half rotor speed.

Copyright © 1963 by ASME
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