Journal
JOURNAL OF SOUND AND VIBRATION
Volume 454, Issue -, Pages 73-84Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2019.04.027
Keywords
Metamaterial; Dispersion spectrum; Locally resonant; Impact absorption
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Funding
- Italian MIUR [2015LYYXA8]
- EU (Erasmus Mundus Programme Smart2)
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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.
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