Modal analysis of hollow cylindrical guided waves and applications

Citation
H. Nishino et al., Modal analysis of hollow cylindrical guided waves and applications, JPN J A P 1, 40(1), 2001, pp. 364-370
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
1
Year of publication
2001
Pages
364 - 370
Database
ISI
SICI code
0021-4922(200101)40:1<364:MAOHCG>2.0.ZU;2-K
Abstract
Dispersion behavior of guided waves in hollow cylinders (cylindrical waves) was evaluated theoretically and experimentally, Observed dispersion behavi or suggests an assignment, different from the traditional one, of longitudi nal (L-), flexural (F-) and torsional (T-) modes which are consistent with Lamb waves and shear-horizontal (SH) mode waves. The L- and F-modes of the cylindrical waves have characteristics which are asymptotic to Lamb waves a nd to waves in a solid cylinder. Experimentally, wide-band cylindrical wave s in aluminum pipes were generated using a laser-ultrasonic method. Wavelet transform of, the cylindrical wave signals was utilized for time-frequency analysis in order to compare the ln with the theoretical dispersion curves . For the L(0, 1), F(1, 1), F(2, 1), L(0, 2), F(2, 2) and F(2, 2) modes of the cylindrical waves, which were efficiently excited, theoretical and expe rimental dispersion curves agree with each other.