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Proceedings Article

Guided waves filtering with warped curvelets

[+] Author Affiliations
Luca De Marchi, Nicolò Speciale

Univ. degli Studi di Bologna (Italy)

Emanuele Baravelli

Univ. degli Studi di Bologna (Italy) and Georgia Institute of Technology (USA)

Massimo Ruzzene

Georgia Institute of Technology (USA)

Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841Z (March 31, 2011); doi:10.1117/12.880456
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From Conference Volume 7984

  • Health Monitoring of Structural and Biological Systems 2011
  • Tribikram Kundu
  • San Diego, California, USA | March 06, 2011

abstract

Lamb wave testing for SHM is complicated by multimodal propagation and by reflections. In this paper, the effectiveness of the decomposition inWarped Curvelet Frames for the analysis of guided ultrasonic waves is studied. The transformation acts by expanding the analyzed signal into a tight frame of basis functions named Curvelets. The curvelet transform may be effectively combined with warping procedures to analyze wave propagation in dispersive media. Experimental results show that, thanks to the spatial and temporal localization of curvelets, it is possible to decompose waves that are overlapped both in the time/space and in the frequency/wavenumber domain.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Luca De Marchi ; Emanuele Baravelli ; Massimo Ruzzene and Nicolò Speciale
"Guided waves filtering with warped curvelets", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841Z (March 31, 2011); doi:10.1117/12.880456; http://dx.doi.org/10.1117/12.880456


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