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A parameter identification method for the rotordynamic coefficients of a high Reynolds number hydrostatic bearingIn identifying the rotordynamic coefficients of a high-Reynolds-number hydrostatic bearing, fluid-flow induced forces present a unique problem, in that they provide an unmeasureable and uncontrollable excitation to the bearing. An analysis method is developed that effectively eliminates the effects of fluid-flow induced excitation on the estimation of the bearing rotordynamic coefficients, by using power spectral densities. In addition to the theoretical development, the method is verified experimentally by single-frequency testing, and repeatability tests. Results obtained for a bearing are the twelve rotordynamic coefficients (stiffness, damping, and inertia coefficients) as functions of eccentricity ratio, speed, and supply pressure.
Document ID
19930069657
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rouvas, C.
(NASA Headquarters Washington, DC United States)
Childs, D. W.
(Texas A & M Univ. College Station, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: ASME, Transactions, Journal of Vibration and Acoustics
Volume: 115
Issue: 3
ISSN: 0739-3717
Subject Category
Mechanical Engineering
Accession Number
93A53654
Funding Number(s)
CONTRACT_GRANT: NAGW-1194
Distribution Limits
Public
Copyright
Other

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