Band-gap structure in two- and three-dimensional cellular locally resonant materials

被引：41

作者：

Moscatelli, Marco ^{[1
]}

Ardito, Raffaele ^{[1
]}

Driemeier, Larissa ^{[2
]}

Comi, Claudia ^{[1
]}

机构：

[1] Politecn Milan, Dept Civil & Environm Engn, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy

[2] Univ Sao Paulo, Dept Mechatron, Sao Paulo, Brazil

来源：

JOURNAL OF SOUND AND VIBRATION | 2019年 / 454卷

关键词：

Metamaterial; Dispersion spectrum; Locally resonant; Impact absorption; MASS DENSITY; SOUND;

D O I：

10.1016/j.jsv.2019.04.027

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Wave propagation in periodic locally resonant materials (LRM) is characterized by the presence of band-gaps occurring at relatively low frequencies which can be exploited for vibration attenuation or impact absorption. In this work we consider the dispersion properties of three-components cellular LRM endowed with 2D (cylindrical) or 3D periodicity. Modal analyses on the unit cell, with Bloch-Floquet periodicity conditions, are performed by the finite element methods. For cylindrical LRM, the limits of plane analyses, which consider uncoupled in-plane and out-of-plane modes, are highlighted. Several different geometries for the 3D unit cells are also proposed and their influence on the band-gap width is studied. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：73 / 84

页数：12

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