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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Experimental Measurements of Actively Controlled Bearing Damping With an Electrorheological Fluid

[+] Author and Article Information
John M. Vance

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

Daniel Ying

Bently Nevada Corporation, 7651 Airport Boulevard, Houston, TX 77059

J. Eng. Gas Turbines Power 122(2), 337-344 (Jan 03, 2000) (8 pages) doi:10.1115/1.483212 History: Received March 09, 1999; Revised January 03, 2000
Copyright © 2000 by ASME
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References

Figures

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Measured Bode plots with 350 CS fluid (X)
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Measured Bode plots with 10 CS fluid (X)
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Theoretical dimensionless bearing force versus frequency ratio for three damping ratios
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Dynamic bearing loads calculated from the measured stiffness and damping coefficients, 10 CS fluid
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Measured runup response with 350 CS fluid and the control system (solid line). Dashed line is expected.
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Measured runup response with 10 CS fluid and the control system (solid line). Dashed line is expected.
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Orbits at the first critical speed with the 10 CS fluid
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Orbits at the second critical speed with the 350 CS fluid
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Rotor orbits at the first critical speed with the 350 CS fluid
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Time trace, 10 CS fluid, 500 V
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Rap test spectrum, X, 350 CS fluid, no voltage
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Rap test spectrum, X, no ER fluid
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Curve fit for bearing no. 1 stiffness
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Cross section of the ER damper
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Rotordynamic test rig for the ER damper

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