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Title of Journal: J Mech Sci Technol

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Abbravation: Journal of Mechanical Science and Technology

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Korean Society of Mechanical Engineers

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DOI

10.1007/978-3-642-37991-8

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1976-3824

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Crack identification in a rotor with an open crack

Authors: Guang Ming Dong Jin Chen
Publish Date: 2010/01/21
Volume: 23, Issue: 11, Pages: 2964-2972
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Abstract

A finite element FE model which is based on a transfer matrix analysis and local flexibility theorem is introduced for crack identification of a static nonrotating rotor with an open crack Through numerical simulation the effects of crack location and crack depth on the mode shapes and the changes in the eigenfrequencies of the cracked rotor are investigated A crack identification algorithm that makes use of the translations of the first mode at two symmetric points and the contour diagram of crack location versus crack depth for the first two given normalized eigenfrequencies is proposed to estimate the crack location and depth in the rotor Two illustrative examples are demonstrated and compared for availability and validity of the proposed algorithmGuang Ming Dong received his BS and MS degrees in Mechanical Engineering from Xi’an Jiao Tong University China in 1999 and 2002 respectively He then received his PhD degree in Mechanical Engineering from Shanghai Jiao Tong University China in 2007 Dr Dong is currently a postdoctoral research fellow at the State Key Laboratory of Mechanical System and Vibration in Shanghai Jiao Tong University China Dr Dong’s research interest is on damage identification and health monitoring of structural and mechanical systems using global methods specifically vibrationbased damage detectionJin Chen received his BS and MS degrees in Mechanical Engineering from Shanghai Jiao Tong University SJTU China and his PhD degree from Tokyo Institute of Technology Japan He is currently a professor and PhD supervisor in Shanghai Jiao Tong University the Director of the SJTU Library and vice director of State Key Laboratory of Mechanical System and Vibration Dr Chen is also a member of the Standing Committee of the Chinese Society of Vibration Engineering president of the Fault Diagnosis Society of China Editor of the Journal of Mechanical System and Signal Processing Standing Editor of the Journal of Vibration Testing and Diagnostics and Chairman of the Alumni Association of Tokyo Institute of Technology in Shanghai

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