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Proceedings Paper

Analysis of transient response of cracked flexible rotor
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Paper Abstract

The transient vibration response of a cracked flexible rotor passing through its critical speed is analyzed for crack detection and monitoring. The effects of different factors such as various crack depths, acceleration, damping, torque, unbalance eccentricity, and rotor weight on the rotor vibrational response are studied. The breathing types of cracks are analyzed using simple hinge model in a case of shallow cracks, and the cosine function is employed in the case of deep cracks. The developed strategy enables the analysis of cracked rotor vibrational response with and without weight dominance, taking into account also the nonsynchronous rotor whirl. In addition, the local cross-flexibility for deep cracks is taken into account. Lastly, the effect of the crack depth on “stalling” of the rotor due to the limited driving torque is investigated.

Paper Details

Date Published: 20 July 2004
PDF: 9 pages
Proc. SPIE 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III, (20 July 2004); doi: 10.1117/12.547996
Show Author Affiliations
Jerzy T. Sawicki, Cleveland State Univ. (United States)
Andrew L. Gyekenyesi, Ohio Aerospace Institute/NASA Glenn Research Ctr. (United States)
George Y. Baaklini, NASA Glenn Research Ctr. (United States)

Published in SPIE Proceedings Vol. 5393:
Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III
Peter J. Shull; Andrew L. Gyekenyesi, Editor(s)

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