@inproceedings{35da58c1ecb24e8cb6d5b055e0f59347,
title = "Modal decomposition of double-mode Lamb waves",
abstract = "This research proposes a technique to decompose a transient, multi-mode, Lamb wave, time-domain signal into its individual Lamb wave modes. The technique is derived for a plane-strain Lamb wave signal consisting of two Lamb wave modes (double-mode Lamb wave signal). The proposed technique assumes knowledge of the propagation dispersion characteristics of Lamb waves, i.e. relationships between frequency and the real part of wavenumber of existing modes. These relationships can be obtained by other signal processing techniques such as the two-dimensional Fourier transform or the short-time Fourier transform. The proposed technique is verified for simulated signals to demonstrate the method's accuracy in an almost-ideal situation. The simulation uses eigen-expansion method for calculation of the total response as a combination of responses due to all existing Lamb modes. The comparison between the decomposed and simulated signals demonstrates the validity of the proposed technique.",
keywords = "Decomposition, Double-mode Lamb waves",
author = "K. Luangvilai and Jacobs, {L. J.} and J. Qu",
year = "2006",
month = mar,
day = "6",
doi = "10.1063/1.2184586",
language = "English",
isbn = "0735403120",
series = "AIP Conference Proceedings",
pages = "633--640",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
note = "Review of Progress in Quantitative Nondestructive ; Conference date: 31-07-2005 Through 05-08-2005",
}