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Dual signal processing approach for Lamb wave analysis

  • J. AssaadEmail author
  • S. Grondel
  • F. El Youbi
  • E. Moulin
  • C. Delebarre
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 128)

Abstract

The identification of Lamb modes is still the most difficult step in the process of damage detection. Therefore, the aim of this paper is to use a dual signal processing approach in order to better identify Lamb modes. This approach is based on the use of a relationship between the Short Time Fourier Transform (STFT) and the Two Dimensional Fourier Transform (2DFT). Indeed, one direct theoretical relationship between their amplitudes is given in the case of both monomode and multimode signals. This relationship is then numerically verified by a two dimensional finite element method. This system is suitable for defect detection and can be easily implemented for real application to structural health monitoring.

Keywords

Damage Detection Structural Health Monitoring Lamb Wave Short Time Fourier Transform Multimode Signal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • J. Assaad
    • 1
    Email author
  • S. Grondel
    • 1
  • F. El Youbi
    • 1
  • E. Moulin
    • 1
  • C. Delebarre
    • 1
  1. 1.IEMN, UMR CNRS 8520, Département OAEUniversité de Valenciennes et du Hainaut Cambrésis, Le Mont HouyValenciennes Cedex 9France

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