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Modeshapes recognition using Fourier descriptors: a simple SHM example

Morlier, Joseph and Bergh, Mauricio and Mevel, Laurent Modeshapes recognition using Fourier descriptors: a simple SHM example. (2011) In: IMAC XXX Conference and exposition on structural dynamics, 30 Jan – 02 Feb 2012, Jacksonville, USA . (Unpublished)

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Abstract

The main objective of this study is to develop an alternative criterion for modeshape classification, as the currently available one, MAC (Modal Assurance Criteria), is only a vector correlation representing modeshape similarities. This new method is developed to provide a set of features (Fourier Descriptors) for comparing modeshapes with “local” similarities of higher interest than “global” similarities using nodal lines. These lines are able to characterize modeshapes very easily. So when damage occurs, we are able to track the few descriptors changes to localise the damage. We validated our method on a CFCF plate demonstrating the quality of the damage localisation and possible use in a “mode tracking” application (space structure).

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Ecole des Mines d'Albi-Carmaux - EMAC
French research institutions > Institut National de la Recherche en Informatique et en Automatique - INRIA
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Other partners > Institut National des Sciences Appliquées de Rennes - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Université de Rennes 1 (FRANCE)
Laboratory name:
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Deposited By: Joseph Morlier
Deposited On:27 Jan 2012 15:52

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