Guided waves filtering with warped curvelets

Luca De Marchi; Emanuele Baravelli; Massimo Ruzzene; Nicolò Speciale

doi:10.1117/12.880456

31 March 2011 Guided waves filtering with warped curvelets

Luca De Marchi, Emanuele Baravelli, Massimo Ruzzene, Nicolò Speciale

Proceedings Volume 7984, Health Monitoring of Structural and Biological Systems 2011; 79841Z (2011) https://doi.org/10.1117/12.880456
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

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.

Citation Download 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 (31 March 2011); https://doi.org/10.1117/12.880456

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