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.
@article{arxiv.2202.10425,
title = {Simulation-Guided Optimization of Granular Phononic Crystal Structure Using the Discrete Element Method},
author = {Igor Ostanin and Hongyang Cheng and Vanessa Magnanimo},
journal= {arXiv preprint arXiv:2202.10425},
year = {2022}
}