This paper proposes an improved squeeze film damper which will prevent the bistable operation associated with conventional squeeze film dampers at large unbalances and/or at small bearing parameters. It consists of a conventional squeeze film damper with a flexibly supported outer ring. This secondary flexible support is considered to be massless, and to have a constant stiffness and damping. The effectiveness of this damper in preventing bistable operation is investigated over a wide range of operating conditions for a rigid rotor supported on a centrally preloaded squeeze film damper. It is shown that depending on relevant parameters such as the stiffness ratio between the secondary support and the retaining spring, the damping coefficient of the support, and the mass ratio between the damper outer ring and the rotor, this proposed damper is very effective in preventing bistable operation even for high unbalance conditions.
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ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition
June 13–16, 1994
The Hague, Netherlands
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7887-3
PROCEEDINGS PAPER
An Improved Squeeze Film Damper for Rotor Vibration Control: Theoretical Results
J. Y. Zhao,
J. Y. Zhao
Australian Defense Force Academy, Canberra, Australia
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I. W. Linnett,
I. W. Linnett
Australian Defense Force Academy, Canberra, Australia
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E. J. Hahn
E. J. Hahn
University of New South Wales, Sydney, Australia
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J. Y. Zhao
Australian Defense Force Academy, Canberra, Australia
I. W. Linnett
Australian Defense Force Academy, Canberra, Australia
E. J. Hahn
University of New South Wales, Sydney, Australia
Paper No:
94-GT-109, V005T14A020; 7 pages
Published Online:
February 18, 2015
Citation
Zhao, JY, Linnett, IW, & Hahn, EJ. "An Improved Squeeze Film Damper for Rotor Vibration Control: Theoretical Results." Proceedings of the ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General. The Hague, Netherlands. June 13–16, 1994. V005T14A020. ASME. https://doi.org/10.1115/94-GT-109
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