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Modeshapes Recognition Using Fourier Descriptors: A Simple SHM Example

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Topics in Modal Analysis II, Volume 6

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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 on a severe case (close to boundary conditions).

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Acknowledgments

This research was funded by EPICEA project (SAPES composites).

Author information

Authors and Affiliations

  1. Université de Toulouse, ICA, ISAE DMSM, 10 avenue edouard Belin, Toulouse cedex 4, 31005, France

    Joseph Morlier & Mauricio Bergh

  2. INRIA, I4S, IRISA Campus de Beaulieu, Rennes, France

    Laurent Mevel

Authors
  1. Joseph Morlier
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  2. Mauricio Bergh
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  3. Laurent Mevel
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Corresponding author

Correspondence to Joseph Morlier .

Editor information

Editors and Affiliations

  1. University of Cincinnati, Cincinnati, Ohio, USA

    R. Allemang

  2. Michigan Technological University, Houghton, USA

    J. De Clerck

  3. University Massachusetts Lowell, Lowell, USA

    C. Niezrecki

  4. Michigan Technological University, Houghton, USA

    J.R. Blough

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© 2012 The Society for Experimental Mechanics, Inc.

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Morlier, J., Bergh, M., Mevel, L. (2012). Modeshapes Recognition Using Fourier Descriptors: A Simple SHM Example. In: Allemang, R., De Clerck, J., Niezrecki, C., Blough, J. (eds) Topics in Modal Analysis II, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2419-2_17

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  • DOI: https://doi.org/10.1007/978-1-4614-2419-2_17

  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4614-2418-5

  • Online ISBN: 978-1-4614-2419-2

  • eBook Packages: EngineeringEngineering (R0)

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