K-space analysis of complex large-scale meta-structures using the Inhomogeneous Wave Correlation method

被引：18

作者：

Tufano, G. ^{[1
,2
]}

Errico, F. ^{[1
,4
]}

Robin, O. ^{[3
]}

Droz, C. ^{[1
]}

Ichchou, M. ^{[1
]}

Pluymers, B. ^{[2
,5
]}

Desmet, W. ^{[2
,5
]}

Atalla, N. ^{[3
]}

机构：

[1] Ecole Cent Lyon, LTDS CNRS UMR 5513, Vibroacoust & Complex Media Res Grp, F-69134 Ecully, France

[2] Katholieke Univ Leuven, PMA, Noise & Vibrat Res Grp, Celestijnenlaan 300 B, B-3001 Heverlee, Belgium

[3] Univ Sherbrooke, GAUS, 2500 Blvd Univ, Sherbrooke, PQ J1K 2R1, Canada

[4] Univ Napoli Federico II, Dipartimento Ingn Ind, Pasta Lab, I-80125 Naples, Italy

[5] DMMS Core Lab, Flanders Make, Belgium

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2020年 / 135卷

基金：

欧盟地平线“2020”;

关键词：

Local resonances; Wavenumber; Dispersion curves; Vibrations control; Periodic structures; Meta-structures; NUMBER-SPACE; SANDWICH STRUCTURES; RIBBED PLATES; PROPAGATION; PREDICTION; FREQUENCY; HONEYCOMB; BEHAVIOR; SOUND;

D O I：

10.1016/j.ymssp.2019.106407

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

An inverse wavenumber identification tool is used to characterize the vibration behavior of three structures and meta-structures with different complexity levels: a plane steel panel, a curved thick composite sandwich shell and a stiffened aluminum aircraft sidewall panel. Bare structures are first studied and then equipped with spatially distributed small-scale resonators, leading to meta-structures. For the two curved panels, tests are conducted under diffuse acoustic field and point mechanical excitations. For each studied case, the effect of the industrially-oriented small-scale resonators is highlighted using frequency and wavenumber analysis, showing general attenuation of the vibration level and even band gaps occurrence. The complex wavenumber identification allows also estimating the structural loss factor in the composite sandwich panel, while the multi-modal behavior is captured in the aluminum aircraft sidewall panel. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：14

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