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Diagnosis for Structural Health of Rotor Dynamic Systems: a Review

Shrikant D. Tawale , Rajesh V. Patil

The ability to monitor the structural health of rotor dynamic systems is becoming increasingly important, as critical components continue to be used despite aging and the associated potential for damage accumulation. A shaft is a means of transferring energy; therefore any type of failure in one, such as fatigue cracks, causes serious damage to the system. The damage may lead to plant shutdown and great economical loss. Thus, many attempts in recent years have been made to deal with shaft crack detection methods. Cracks present in any structure deteriorate its performance. For detecting a crack present in the structure, many vibration-based methods include non-model-based and model-based methods have been widely used from the last few years. A comprehensive survey of available literature on cracked structures is carried out. In this paper the development of discontinuities in the shaft, the effect of crack on vibration behavior and its stiffness have been discussed. Also the review of analytical and experimental based techniques of crack detection has been carried out.