Stability of Gas-Lubricated, Externally Pressurized Porous Journal Bearings

[+] Author and Article Information
Dah-chen Sun

Engineering Mechanics Department, Research Laboratories, General Motors Corporation, Warren, Mich.

J. of Lubrication Tech 97(3), 494-505 (Jul 01, 1975) (12 pages) doi:10.1115/1.3452645 History: Received June 21, 1974; Online October 18, 2010


A linear theory of hybrid instability, due to a combination of both whirl and pneumatic hammer, in gas-lubricated porous journal bearings is presented. An approximate solution to the stability problem is obtained by the use of a Galerkin expansion. Results are presented in terms of the variation of stability parameters, such as the threshold mass, the whirl frequency ratio, etc., with the compressibility number and eccentricity ratio. In addition, the effects of permeability, supply pressure, and bearing length are investigated.

Copyright © 1975 by ASME
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