TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Actively Controlled Bearing Dampers for Aircraft Engine Applications

[+] Author and Article Information
John M. Vance

Mechanical Engineering Department, Texas A & M University, College Station, TX 77843

Daniel Ying

Turbine Manufacturing Division, ABB Power Generation, Inc.

Jorgen L. Nikolajsen

Staffordshire University, POB 333, Stafford ST18 ODF, U.K.

J. Eng. Gas Turbines Power 122(3), 466-472 (May 15, 2000) (7 pages) doi:10.1115/1.1286922 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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Cross section of the ER damper
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Electroviscous fluid behavior (from Nikolajsen and Hoque, 1990)
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Effect of viscous damping on vibration amplitude
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Dimensionless bearing force vs. frequency ratio
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Coulomb friction test rig with dry friction disks
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DC electromagnetic damper operating principle
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Eddy-current damper operating principle
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Eddy-current damper rig
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Measured eddy current damping
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Predicted eddy current damping
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ER damper weight vs. yield stress of the ER fluid
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Specific damping of the ER damper vs. yield shear stress of the ER fluid




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