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A study of the non-linear interaction between an eccentric squeeze film damper and an unbalanced flexible rotor

A study of the non-linear interaction between an eccentric squeeze film damper and an unbalanced flexible rotor
A study of the non-linear interaction between an eccentric squeeze film damper and an unbalanced flexible rotor
In this paper, the nonlinear interaction between an eccentric squeeze film damper and an unbalanced flexible rotor is investigated, paying particular attention to the effect of cavitation in the damper. A harmonic balance method that uses the receptance functions of the rotating linear part of the system to determine periodic solutions to the nonlinear problem is used to predict vibration levels in a test rig. By comparing predictions obtained respectively with, and without, lower pressure limits for the squeeze film damper model, it is concluded that cavitation is promoted by increasing static eccentricity and/or unbalance level. This, in turn, is found to have a profound effect on the predictions for the critical vibration levels, which such dampers are designed to attenuate. Experimental results are presented to support the findings.
0742-4795
855-866
Bonello, Philip
a990612b-0024-4858-b910-b185414b5e00
Brennan, Michael J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Holmes, Roy
551b767a-eeda-4916-a01b-ff187bc84062
Bonello, Philip
a990612b-0024-4858-b910-b185414b5e00
Brennan, Michael J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Holmes, Roy
551b767a-eeda-4916-a01b-ff187bc84062

Bonello, Philip, Brennan, Michael J. and Holmes, Roy (2004) A study of the non-linear interaction between an eccentric squeeze film damper and an unbalanced flexible rotor. Journal of Engineering for Gas Turbines and Power, 126 (4), 855-866. (doi:10.1115/1.1787503).

Record type: Article

Abstract

In this paper, the nonlinear interaction between an eccentric squeeze film damper and an unbalanced flexible rotor is investigated, paying particular attention to the effect of cavitation in the damper. A harmonic balance method that uses the receptance functions of the rotating linear part of the system to determine periodic solutions to the nonlinear problem is used to predict vibration levels in a test rig. By comparing predictions obtained respectively with, and without, lower pressure limits for the squeeze film damper model, it is concluded that cavitation is promoted by increasing static eccentricity and/or unbalance level. This, in turn, is found to have a profound effect on the predictions for the critical vibration levels, which such dampers are designed to attenuate. Experimental results are presented to support the findings.

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Published date: October 2004

Identifiers

Local EPrints ID: 46587
URI: https://eprints.soton.ac.uk/id/eprint/46587
ISSN: 0742-4795
PURE UUID: fd857107-5ea0-4a9a-be8c-ad355bb1a812

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Date deposited: 19 Jul 2007
Last modified: 13 Mar 2019 21:02

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Contributors

Author: Philip Bonello
Author: Michael J. Brennan
Author: Roy Holmes

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