Simulation-guided optimization of granular phononic crystal structure using the discrete element method

Igor Ostanin*, Hongyang Cheng, Vanessa Magnanimo

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
256 Downloads (Pure)

Abstract

The paper describes a novel methodology of designing granular phononic crystals for acoustic wave manipulations. A discrete element method is utilized to model the dynamics of a pulse wave propagating through the densely packed assembly of elastic spherical particles with an embedded phononic crystal — the region consisting of a certain arrangement of particles with varying densities. We suggest an optimization strategy that extremizes the useful properties of a granular phononic crystal, which are described in terms of a noise-proof functional based on frequency–wavenumber summation of spectral energy density. Few types of efficient phononic crystals are identified. The suggested methodology is of interest for a number of applications, in particular, for seismic shielding and selective sound absorption.

Original languageEnglish
Article number101825
JournalExtreme Mechanics Letters
Volume55
Early online date24 Jun 2022
DOIs
Publication statusPublished - Aug 2022

Keywords

  • Discrete element method
  • Granular phononic crystals
  • UT-Hybrid-D

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