Structural Damping of Self-Acting Compliant Foil Journal Bearings

[+] Author and Article Information
Hooshang Heshmat, C.-P. Roger Ku

Mechanical Technology Incorporated, 968 Albany-Shaker Road, Latham, NY 12110

J. Tribol 116(1), 76-82 (Jan 01, 1994) (7 pages) doi:10.1115/1.2927050 History: Received March 01, 1993; Revised July 02, 1993; Online June 05, 2008


This paper describes an experimental investigation into the dynamic characteristics of corrugated foil (bump foil) strips used in compliant surface foil journal bearings and dampers. In the experimental method described herein, a test facility with a journal supported by a compliant foil journal bearing was built. The nonrotating journal was driven by two shakers which were used to simulate dynamic forces acting on bump foil strips. The dynamic structural stiffness and equivalent viscous damping coefficients are calculated based on the experimental measurements for a wide range of operating conditions. The results are compared to the analytical predictions obtained by a theoretical model developed earlier.

Copyright © 1994 by The American Society of Mechanical Engineers
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