A Decadal Review of Various Modelling and Analysis of Cracked Rotors

Abstract

When there is bearing misalignment, shaft bow, mass unbalance, or cracks, rotors are considered faulty. The defect caused by cracks is the most difficult of the four to diagnose since cracks are not apparent. Cracks can’t be identified with displacement gauges, and they can’t be fixed with balancing machineries. As a result, a rotor with cracks poses the greatest risk when compared to rotors with any other flaw. Signal-based methods, parametric methods, model-based methods, and modal-based methods are all used to detect cracks. Extensive research has gone into establishing various methodologies and procedures to efficiently model and analyse rotor cracks during the last four decades, resulting in countless technical papers on the subject. For the benefit of the research community, a brief periodic review of such a corpus of work is needed. This paper conducts a chronological review of cracked rotor literature of the last decade, spanning the years 2010 to 2021. On their research, methods, and outcomes, the experimental investigations, mathematical modelling, and computation algorithms are given in condensed form. An attempt has been made to note the potential areas of further research for each piece of literature.