Wave dispersion in thin-walled orthotropic waveguides using the first order shear deformation theory

被引：6

作者：

Mazzotti, M. ^{[1
]}

Bartoli, I. ^{[1
]}

Miniaci, M. ^{[2
]}

Marzani, A. ^{[3
]}

机构：

[1] Drexel Univ, Civil Architectural & Environm Engn CAFE Dept, 3141 Chestnut St, Philadelphia, PA 19104 USA

[2] Univ Turin, Dept Phys, Via Pietro Giuria 1, I-10125 Turin, Italy

[3] Univ Bologna, Dipartimento Ingn Civile Chim Ambientale & Mat DI, Viale Risorgimento 2, I-40136 Bologna, Italy

来源：

THIN-WALLED STRUCTURES | 2016年 / 103卷

关键词：

Thin-walled waveguides; SAFE; Dispersion; Energy velocity; Axial prestress; Attenuation; TRANSVERSELY ISOTROPIC CYLINDERS; ARBITRARY CROSS-SECTION; FINITE-ELEMENT-ANALYSIS; MATRIX TECHNIQUES; GROUP-VELOCITY; PROPAGATION; COMPUTATION; CURVES; SHELLS; PLATES;

D O I：

10.1016/j.tws.2016.02.014

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The aim of this paper is to extract the dispersion parameters, i.e. phase velocity, energy velocity and attenuation, of orthotropic thin-walled waveguides with generic cross-section. To this end, a semi analytical finite element (SAFE) formulation is presented, which is based on the Reissner-Mindlin theory of curved shells. Complex axial wavenumbers and mode shapes of guided wave modes are extracted from a second order polynomial eigenvalue problem, while the energy velocity is post-processed using the computed eigensolutions and SAFE operators. Different numerical examples are proposed, for which the obtained results are in very good agreement with those computed using other well-stated SAFE formulations. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：128 / 140

页数：13

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