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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Crack Detection in a Rotor Dynamic System by Vibration Monitoring—Part I: Analysis

[+] Author and Article Information
Itzhak Green

Georgia Institute of Technology, GWW School of Mechanical Engineering, Atlanta, GA 30332

Cody Casey

Schlumberger, 14910 Airline Road, Rosharon, TX 77583

J. Eng. Gas Turbines Power 127(2), 425-436 (Apr 15, 2005) (12 pages) doi:10.1115/1.1789514 History: Received October 01, 2002; Revised March 01, 2003; Online April 15, 2005
Copyright © 2005 by ASME
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References

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Figures

Grahic Jump Location
(a) Cracked system; (b) global asymmetry crack model
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Global asymmetry model free response at various crack depth values: (a) uncracked; (b) 20%; (c) 30%; (d) 40%
Grahic Jump Location
Global asymmetry model forced tilt 2X response: (a) Low-speed range; (b) high-speed range
Grahic Jump Location
Local asymmetry crack model
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Local crack model: (a) shaft section containing a crack; (b) crack cross section
Grahic Jump Location
Dimensionless crack flexibilities
Grahic Jump Location
Local asymmetry model free response at various crack values: (a) uncracked; (b) 20%; (c) 30%; (d) 40%
Grahic Jump Location
Local asymmetry model forced response: (a) low-speed range; (b) high-speed range
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Asymmetric shaft cross section

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