Study of the bandgap property of a membrane-type metamaterial with multiple decorated masses

Cong GAO, Dunant Halim

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

This work investigates the bandgap property of a membrane-type metamaterial (MemM) consisting of a periodically arranged membrane-type resonators. Each resonator is constructed of a circular-shaped mass that is located inside an annular-shaped mass and both decorated masses are concentrically attached to the middle of a pre-stressed membrane. The proposed configuration of decorated masses is designed to allow the metamaterial to generate multiple local resonant bandgaps. The vibration mode shapes of this configuration are investigated through numerical simulation so to reveal the bandgap forming mechanism. A stacked resonator structure of membrane-type metamaterial is normally required when multiple bandgaps are in demand. Therefore, when a metamaterial with multiple bandgaps are required, the proposed membrane-type metamaterial has the space-saving advantage in contrast to using a stacked structure of resonators. Through numerical simulation studies of membrane-type resonators with dual decorated masses, the feasibility of adjusting the geometry of decorated masses to achieve multiple bandgaps is demonstrated.

Original languageEnglish
Title of host publication"Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021
EditorsEleonora Carletti, Malcolm Crocker, Marek Pawelczyk, Jiri Tuma
PublisherSilesian University Press
ISBN (Electronic)9788378807995
Publication statusPublished - 2021
Event27th International Congress on Sound and Vibration, ICSV 2021 - Virtual, Online
Duration: 11 Jul 202116 Jul 2021

Publication series

Name"Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International Congress on Sound and Vibration, ICSV 2021

Conference

Conference27th International Congress on Sound and Vibration, ICSV 2021
CityVirtual, Online
Period11/07/2116/07/21

Keywords

  • Bandgap
  • Membrane-type
  • Metamaterial
  • Structural vibration

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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