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©2013 The Japan Society of Mechanical Engineers This paper develops an analytical method of the vibration of the finite element rotating shaft model with an open crack which was developed in our previous study. Particularly, the vibration of the rotating shaft with an open crack under the harmonic excitation is investigated, and the fundamental equations governing the vibration of the cracked shaft are derived in that case. By comparing the obtained their theoretical results with the experimental results quantitatively, the validity of the analytical methods and the derived fundamental equations are verified. This result contributes to detect a crack of a rotor in its early stage.

Finite Element Analysis of the Vibration of a Rotor System with an Open Crack under the Harmonic Excitation