Calculation of Stiffness and Damping Coefficients for Elastically Supported Gas Foil Bearings

[+] Author and Article Information
J.-P. Peng, M. Carpino

Department of Mechanical Engineering, Pennsylvania State University, University Park, PA 16802

J. Tribol 115(1), 20-27 (Jan 01, 1993) (8 pages) doi:10.1115/1.2920982 History: Received February 14, 1992; Revised June 01, 1992; Online June 05, 2008


The stiffness and damping coefficients of an elastically supported gas foil bearing are calculated. A perfect gas is used as the lubricant, and its behavior is described by the Reynolds equation. The structural model consists only of an elastic foundation. The fluid equations and the structural equations are coupled. A perturbation method is used to obtain the linearized dynamic coefficient equations. A finite difference formulation has been developed to solve for the four stiffness and the four damping coefficients. The effect of the bearing compliance on the dynamic coefficients is discussed in this paper.

Copyright © 1993 by The American Society of Mechanical Engineers
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