Data from: Ultra-low and ultra-broad-band nonlinear acoustic metamaterials

Fang, Xin, National University of Defense Technology

Wen, Jihong, National University of Defense Technology

Bonello, Bernard, French National Centre for Scientific Research

Yin, Jianfei, National University of Defense Technology

Yu, Dianlong, National University of Defense Technology

Published Mar 12, 2018 on Dryad. https://doi.org/10.5061/dryad.6m8nt

Cite this dataset

Fang, Xin et al. (2018). Data from: Ultra-low and ultra-broad-band nonlinear acoustic metamaterials [Dataset]. Dryad. https://doi.org/10.5061/dryad.6m8nt

Abstract

Linear acoustic metamaterials (LAMs)are widely used to manipulate sound, but it is challenging to obtain bandgaps withthe generalized width (the ratio of the bandgap width to its start frequency) γ>1 based on linear mechanisms.Here, we adopt both theoretical and experimental approaches todescribe the nonlinear chaotic mechanism in both one-dimensional (1D) and two-dimensional (2D)nonlinear acoustic metamaterials (NAMs). This mechanismenables the strongly NAMsto reduce the transmission of wave by as much as 20-40dB in an ultra-low and ultra-broad bandthat consists of bandgaps and chaotic bands.With the subwavelength cells, the generalized width reachesγ=21 in a 1D NAM and it goes up to γ=39 in a 2D NAM, which overcomesthe limit of bandwidth for wave suppression in current LAMs.Our work allows for further progress in the understanding of the dynamics of NAMs and it opens up avenuesindouble-ultra acoustic manipulations.

Usage notes

Open data

All these data files are experimental data on a nonlinear acoustic metamaterial Beam and a Plate. The experiment apparatus and measuring methods are described in the Article. The position of the measuring points are also defined in the Article.

open data -Xin Fang.zip