期刊
ADVANCES IN STRUCTURAL ENGINEERING
卷 13, 期 6, 页码 1075-1088出版社
SAGE PUBLICATIONS INC
DOI: 10.1260/1369-4332.13.6.1075
关键词
damage detection; vibration; frequency; mode shape; modal strain energy; finite element method
资金
- China 863 Project [2009AA11Z101]
- Natural Science Foundation of China (NSFC) [50678193]
In this paper, a damage detection method based on an efficient algebraic algorithm of element modal strain energy sensitivity is proposed for detecting damage location and severity. The method adopts a closed form of element modal strain energy sensitivity. The element damage equations have been systematically established and a solution technique incorporated with the singular value decomposition-based regularization algorithm is used to ensure the correct solutions. A number of assumed damage scenarios for numerically simulated beams and two-dimensional frame structure have been used to demonstrate the applicability of proposed method. The noise effect is also presented. It is demonstrated that the proposed method is efficient in a one-step (non-iterative) procedure.
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