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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Chebyshev Polynomials Fits for Efficient Analysis of Finite Length Squeeze Film Damped Rotors

[+] Author and Article Information
F. A. Rodrigues, F. Thouverez, C. Gibert, L. Jezequel

Ecole Centrale de Lyon—Laboratoire de Tribologie et Dynamique des Systemes, 36, Avenue Guy de Collongue B. P. 163, 69131 Ecully Cedex, France

J. Eng. Gas Turbines Power 125(1), 175-183 (Dec 27, 2002) (9 pages) doi:10.1115/1.1423319 History: Received March 01, 2000; Revised May 01, 2001; Online December 27, 2002
Copyright © 2003 by ASME
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References

Figures

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Schematic view of a squeeze film damper (SFD)
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Cross section and coordinate frames of the squeeze film damper (SFD)
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Squeeze film damped flexible rotor—Jeffcott model
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Inspection of the fit quality: radial force function of ė and ϕ̇ for ε=0.5
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Inspection of the fit quality: radial force relative error at quadrature points
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Comparison of unbalance responses calculated using different squeeze film damper (SFD) forces models
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Stability analysis results for different squeeze film damper (SFD) forces models
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Comparison of quasi-periodic orbits obtained by numerical integration for ωad=2.3
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Comparison of results obtained by the finite difference method and the Chebyshev polynomials fit

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