Analysis of transient response of cracked flexible rotor

Jerzy T. Sawicki; Andrew L. Gyekenyesi; George Y. Baaklini

doi:10.1117/12.547996

20 July 2004 Analysis of transient response of cracked flexible rotor

Jerzy T. Sawicki, Andrew L. Gyekenyesi, George Y. Baaklini

Proceedings Volume 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III; (2004) https://doi.org/10.1117/12.547996
Event: NDE for Health Monitoring and Diagnostics, 2004, San Diego, CA, United States

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.

Citation Download Citation

Jerzy T. Sawicki, Andrew L. Gyekenyesi, and George Y. Baaklini "Analysis of transient response of cracked flexible rotor", Proc. SPIE 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III, (20 July 2004); https://doi.org/10.1117/12.547996

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