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Proceedings Paper

Sideband frequency response function based damage identification of rotor system with open cracks
Author(s): Jie Zhao; Hans DeSmidt
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Paper Abstract

This paper develops a new vibration based damage detection method to identify the location and severity of structural damage of periodically time-varying systems. The frequency response function (FRF) shifts induced by cracks are utilized to detect the location, depth and orientation angle of open transverse cracks on a shaft-disk system. The dynamical model of system is built based on the Lagrange principle and the assumed mode method while the crack model for periodically time-varying systems is based on the fracture mechanics. This method provides the advantages of arbitrary interrogation frequency and multiple inputs/outputs which greatly enriches the dataset for damage identification. The method is synthesized via harmonic balance and numerical examples for a shaft/disk system to demonstrate the effectiveness in detecting both location and severity of the structural damage.

Paper Details

Date Published: 9 March 2014
PDF: 9 pages
Proc. SPIE 9064, Health Monitoring of Structural and Biological Systems 2014, 90640Q (9 March 2014); doi: 10.1117/12.2045253
Show Author Affiliations
Jie Zhao, The Univ. of Tennessee Knoxville (United States)
Hans DeSmidt, The Univ. of Tennessee Knoxville (United States)

Published in SPIE Proceedings Vol. 9064:
Health Monitoring of Structural and Biological Systems 2014
Tribikram Kundu, Editor(s)

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