Evaluation of dispersion characteristics of multimodal guided waves using slant stack transform

被引：34

作者：

Ambrozinski, Lukasz ^{[1
]}

Piwakowski, Bogdan ^{[2
]}

Stepinski, Tadeusz ^{[1
]}

Uhl, Tadeusz ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, PL-30059 Krakow, Poland

[2] IEMN Ecole Cent Lille, F-59651 Villeneuve Dascq, France

来源：

NDT & E INTERNATIONAL | 2014年 / 68卷

关键词：

Lamb waves; Dispersion curves; Phase velocity; Slant stack; Anisotropy; PROPAGATION; SIGNALS; PHASE;

D O I：

10.1016/j.ndteint.2014.08.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper slant stack (SL) transform is presented and its application for processing of multi-modal dispersive lamb waves snapshots is proposed. The SL transform can facilitate the evaluation of dispersion curves based on a set of signals captured at the structure's surface. The presented technique leads explicitly to the frequency-phase-velocity representation of the processed signals. Theory behind the technique is presented and the SL results are compared to those obtained using the 20 discrete Fourier transform. The SL is used to process data acquired from an aluminum plate and to investigate anisotropic properties of a composite plate. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：88 / 97

页数：10

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