Structural Health Monitoring and Damage Assessment Using Frequency Response Correlation Criteria / C. Zang in Journal of engineering mechanics, Vol. 133 N°9 (Septembre 2007)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 133 N°9 (Septembre 2007) . - pp. 981-993 Titre : Structural Health Monitoring and Damage Assessment Using Frequency Response Correlation Criteria Type de document : texte imprimé Auteurs : C. Zang, Auteur ; M. I. Friswell, Auteur Année de publication : 2007 Article en page(s) : pp. 981-993 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Assessment Correlation Damage Frequency response Structural health monitoring Résumé : Two frequency response correlation criteria, namely the global shape correlation (GSC) function and the global amplitude correlation (GAC) function, are established tools to quantify the correlation between predictions from a finite-element (FE) model and measured data for the purposes of FE model validation and updating. This paper extends the application of these two correlation criteria to structural health monitoring and damage detection. In addition, window-averaged versions of the GSC and GAC, namely WAIGSC and WAIGAC, are defined as effective damage indicators to quantify the change in structural response. An integrated method of structural health monitoring and damage assessment, based on the correlation functions and radial basis function neural networks, is proposed and the technique is applied to a bookshelf structure with 24 measured responses. The undamaged and damaged states, single and multiple damage locations, as well as damage levels, were successfully identified in all cases studied. The ability of the proposed method to cope with incomplete measurements is also discussed. ISSN : 0733-9399 En ligne : http://cedb.asce.org/cgi/WWWdisplay.cgi?160476 [article] Structural Health Monitoring and Damage Assessment Using Frequency Response Correlation Criteria [texte imprimé] / C. Zang, Auteur ; M. I. Friswell, Auteur . - 2007 . - pp. 981-993. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 133 N°9 (Septembre 2007) . - pp. 981-993 Mots-clés : Assessment Correlation Damage Frequency response Structural health monitoring Résumé : Two frequency response correlation criteria, namely the global shape correlation (GSC) function and the global amplitude correlation (GAC) function, are established tools to quantify the correlation between predictions from a finite-element (FE) model and measured data for the purposes of FE model validation and updating. This paper extends the application of these two correlation criteria to structural health monitoring and damage detection. In addition, window-averaged versions of the GSC and GAC, namely WAIGSC and WAIGAC, are defined as effective damage indicators to quantify the change in structural response. An integrated method of structural health monitoring and damage assessment, based on the correlation functions and radial basis function neural networks, is proposed and the technique is applied to a bookshelf structure with 24 measured responses. The undamaged and damaged states, single and multiple damage locations, as well as damage levels, were successfully identified in all cases studied. The ability of the proposed method to cope with incomplete measurements is also discussed. ISSN : 0733-9399 En ligne : http://cedb.asce.org/cgi/WWWdisplay.cgi?160476

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