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Identification of Bearing Stiffness and Damping Coefficients Using Phase-Plane Diagrams

[+] Author Affiliations
Juan C. Jáuregui

Universidad Autónoma de Querétaro, Querétaro, México

Luis San Andrés

Texas A&M University, College Station, TX

Oscar De Santiago

Ciateq A.C., Querétaro, México

Paper No. GT2012-69980, pp. 731-737; 7 pages
doi:10.1115/GT2012-69980
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 7: Structures and Dynamics, Parts A and B
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4473-1
  • Copyright © 2012 by ASME

abstract

The reliable identification of dynamic parameters in mechanical systems remains a big challenge, in particular for nonlinear systems. There is not a single mathematical model encompassing the universe of most systems. From a practical point of view, the identification of system parameters depends on the measurement data as well as on the reference model.

This paper presents a novel method for identifying the dynamic parameters of a gas bearing, whose force coefficients are strong functions of frequency. The method is based on the analysis of the phase diagram with the model assuming a mass-damper-spring system with time-dependent force coefficients. The phase diagram could be implemented electronically for on line monitoring and ready fault detection.

Copyright © 2012 by ASME

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