Vibration Analysis of Rotor using Cracks with Various Depth and Positions

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-45 Number-9
Year of Publication : 2017
Authors : Kannan S, Balaji N, Arun S
DOI :  10.14445/22315381/IJETT-V45P281


Kannan S, Balaji N, Arun S "Vibration Analysis of Rotor using Cracks with Various Depth and Positions", International Journal of Engineering Trends and Technology (IJETT), V45(9),428-431 March 2017. ISSN:2231-5381. published by seventh sense research group

A strong interest has developed within the past several years in the dynamic behavior of Turbo machinery with cracked shafts. Vibration investigation of a damaged structure is one approach for fault diagnosis. Vibration diagnosis, as a non-destructive detection technique, has recently become of greater importance. Cracks in vibrating component can initiate catastrophic failures. The presences of Cracks change the physical characteristics of a structure which in turn alter its dynamic response characteristics. Therefore there is need to understand dynamics of cracked structures. Crack depth and location are the main parameters for the vibration analysis. A crack on a beam element introduces considerable local flexibility due to the strain energy concentration in the vicinity of the crack tip under load. In the present study, vibration analysis is carried out on a simply supported rotor shaft with open transverse crack, to study the response characteristics. It is verified from simulation analysis that the presence of crack decreases the natural frequency and amplitude of vibration. The mode shapes also changes considerably due to the presence of crack.


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Vibration investigation, crack, natural frequency, amplitude.