par Tondreau, Gilles ;Deraemaeker, Arnaud
Editeur scientifique Cunha, Alvaro;Ribeiro, P.;De Sa Caetano, Elsa;Müller, Gerhard
Référence EURODYN 2014(30 June - 2 July 2014: Porto, Portugal), Proceedings of the 9th International Conference on Structural Dynamics, page (2419-2425)
Publication Publié, 2014-06-30
Publication dans des actes
Résumé : This work investigates the experimental application of a damage localization technique based on local modal filters on a 3.78 meters long steel I-beam equipped with 20 piezoelectric (PVDF) sensors, and excited with an electro-dynamic shaker. A small damage responsible of a small shift of the eigenfrequencies (less than 2%) is introduced at different locations by fixing a stiffener. By following the guidelines established in previous numerical studies, the modal filters are applied on five local filters in order to locate damage, and a new feature extraction procedure is proposed. Hotelling T2 control charts are used to locate automatically all the damage positions correctly. The results obtained with this experimental application of modal filters based on strain measurements confirm the first experimental observations that were previously obtained on a small scale set-up, and show the real interest of this very simple method for output-only non-model based automated damage localization of real structures.