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F. El Khannoussi¹, A. Khamlichi¹, A. Hajraoui¹ and A. Limam²

¹Systems of Communications and Detection Laboratory
Faculty of Sciences at Tetouan, M'hannech, Morocco
²Civil and Environmental Engineering Laboratory, Institute of Applied Sciences at Lyon
Villeurbanne, France

doi:10.4203/ccp.102.187

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F. El Khannoussi, A. Khamlichi, A. Hajraoui, A. Limam, "Detection of Localized Damage of Beams using a Frequency Based Method", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 187, 2013. doi:10.4203/ccp.102.187

Keywords: damage detection, modal strain energy, frequency method, Bayesian theory.

Summary

In this paper a Bayesian approach was considered in order to identify localized damage occupying two distinct sites of a Mindlin Plate. The method is based on the measurement of the first natural frequencies of the plate and the determination of the modal shapes for both the reference state assumed to be undamaged and the actual damaged state. It was assumed that the measured natural frequencies are perturbed through a linear additive model by a Gaussian noise having a zero mean. The prior information was also assumed to be a multivariate Gaussian. These two random variables were assumed to be independent mutually and having proportional diagonal covariance matrices. The Bayesian approach has enabled then to estimate damage distribution undergone by the plate. The effectiveness of this approach was discussed finally as function of the two-site damage pattern.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 187 Detection of Localized Damage of Beams using a Frequency Based Method F. El Khannoussi¹, A. Khamlichi¹, A. Hajraoui¹ and A. Limam² ¹Systems of Communications and Detection Laboratory Faculty of Sciences at Tetouan, M'hannech, Morocco ²Civil and Environmental Engineering Laboratory, Institute of Applied Sciences at Lyon Villeurbanne, France doi:10.4203/ccp.102.187 purchase the full-text of this paper Full Bibliographic Reference for this paper F. El Khannoussi, A. Khamlichi, A. Hajraoui, A. Limam, "Detection of Localized Damage of Beams using a Frequency Based Method", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 187, 2013. doi:10.4203/ccp.102.187 Keywords: damage detection, modal strain energy, frequency method, Bayesian theory. Summary In this paper a Bayesian approach was considered in order to identify localized damage occupying two distinct sites of a Mindlin Plate. The method is based on the measurement of the first natural frequencies of the plate and the determination of the modal shapes for both the reference state assumed to be undamaged and the actual damaged state. It was assumed that the measured natural frequencies are perturbed through a linear additive model by a Gaussian noise having a zero mean. The prior information was also assumed to be a multivariate Gaussian. These two random variables were assumed to be independent mutually and having proportional diagonal covariance matrices. The Bayesian approach has enabled then to estimate damage distribution undergone by the plate. The effectiveness of this approach was discussed finally as function of the two-site damage pattern. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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