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http://dx.doi.org/10.5050/KSNVN.2007.17.3.257

A Study for The Comparison of Structural Damage Detection Method Using Structural Dynamic Characteristic Parameters  

Choi, Byoung-Min (국방과학연구소)
Woo, Ho-Kil (충남대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.17, no.3, 2007 , pp. 257-263 More about this Journal
Abstract
Detection of structural damage is an inverse problem in structural engineering. There are three main questions in the damage detection: existence, location and extent of the damage. In concept, the natural frequency and mode shapes of any structure must satisfy an eigenvalue problem. But, if a potential damage exists in a structure, an error resulting from the substitution of the refined analytical finite element model and measured modal data into the structural eigenvalue equation will occur, which is called the residual modal forces, and can be used as an indicator of potential damage in a structure. In this study, a useful damage detection method is proposed and compared with other two methods. Two degree-of-freedom system and Cantilever beam are used to demonstrate the approach. And the results of three introduced method are compared.
Keywords
Structural Damage; Natural Frequency; Mode Shape; Modal Sensitivity Method; Residual Force Method; Modal Combination Method; Residual Function; Eigenvalue Problem;
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Times Cited By KSCI : 1  (Citation Analysis)
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