Many practical rotor dynamic systems contain shaft/rotor elements that are highly susceptible to transverse cross-sectional cracks due to fatigue. The early detection of mechanical malfunction that can be provided by an effective vibration monitoring system is essential. Two theoretical analyses, global and local asymmetry crack models, are utilized to identify characteristics of the system response that may be directly attributed to the presence of a transverse crack in a rotating shaft. A model consisting of an overhung whirling rotor is utilized to match an experimental test rig. A 2X harmonic component of the system response is shown to be the primary response characteristic resulting from the introduction of a crack. Once the unique characteristics of the system response are identified, they serve then as target observations for the monitoring system.
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ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
June 16–19, 2003
Atlanta, Georgia, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-3687-8
PROCEEDINGS PAPER
Crack Detection in a Rotor Dynamic System by Vibration Monitoring: Part I — Analysis Available to Purchase
Itzhak Green,
Itzhak Green
Georgia Institute of Technology, Atlanta, GA
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Cody Casey
Cody Casey
Schlumberger, Rosharon, TX
Search for other works by this author on:
Itzhak Green
Georgia Institute of Technology, Atlanta, GA
Cody Casey
Schlumberger, Rosharon, TX
Paper No:
GT2003-38659, pp. 569-582; 14 pages
Published Online:
February 4, 2009
Citation
Green, I, & Casey, C. "Crack Detection in a Rotor Dynamic System by Vibration Monitoring: Part I — Analysis." Proceedings of the ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. Volume 4: Turbo Expo 2003. Atlanta, Georgia, USA. June 16–19, 2003. pp. 569-582. ASME. https://doi.org/10.1115/GT2003-38659
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