Band-gap structure in two- and three-dimensional cellular locally resonant materials. (18th August 2019)

• Record Type: Journal Article
• Authors: Moscatelli, Marco; Ardito, Raffaele; Driemeier, Larissa; Comi, Claudia
• Is Part Of: Journal of sound and vibration. Volume 454(2019)
• Page Start: 73
• Page End: 84
• Publication Date: 2019-08-18
• Subjects: Metamaterial -- Dispersion spectrum -- Locally resonant -- Impact absorption; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2019.04.027
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: 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.