Determination of Squeeze-Film Dynamic Coefficients From Experimental Transient Data

[+] Author and Article Information
M. D. Ramli, J. B. Roberts, J. Ellis

School of Engineering & Applied Sciences, University of Sussex, Falmer, Brighton, Sussex BN1 9QT, UK

J. Tribol 109(1), 155-163 (Jan 01, 1987) (9 pages) doi:10.1115/1.3261308 History: Received March 14, 1986; Online October 29, 2009


A technique for obtaining estimates of the direct damping and inertial coefficients of a squeeze-film bearing is described. This involves applying parametric identification and optimization techniques to digitized, free-decay experimental displacement records. The experimentally obtained coefficients, derived by this technique, were found to be significantly higher in magnitude (in some cases by a factor of about 10) than the corresponding values derived from conventional short-bearing theory, and to be virtually independent of the frequency of vibration.

Copyright © 1987 by ASME
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