Expanding the Bragg scattering bandgap of phononic crystals using acoustic black holes
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Published:2023-10-14
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Volume:
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ISSN:0217-9792
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Container-title:International Journal of Modern Physics B
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language:en
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Short-container-title:Int. J. Mod. Phys. B
Author:
Liang Haofeng1ORCID,
Liang Xiao1,
Chu Jiaming1,
Zhou Zhuo2
Affiliation:
1. School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, P. R. China
2. School of Mechanical Engineering, and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an, Shanxi 710049, P. R. China
Abstract
In this paper, a phononic crystal with acoustic black hole (ABH) characteristics is designed based on the compression effect of ABHs on acoustic wavelengths. The simulation results show that the lower limit of the first bandgap of the phononic crystal with ABH is reduced by 127.8[Formula: see text]Hz, the upper limit is increased by 694.4[Formula: see text]Hz, and the bandgap width is increased by 822.2[Formula: see text]Hz compared with that of the phononic crystal without ABH. The mechanism of bandgap expansion is discussed based on the mechanism of bandgap formation and the acoustic modulation effect of the ABH. The influence of the geometric and material parameters of the ABH on the bandgap is analyzed. The ABHs offer a new way of optimizing phononic crystals, and this work can be used as a reference for their design.
Funder
National Science Foundation of China
Guangdong Basic and Applied Basic Research Fund Regional Joint Fund Youth Fund Project
The science and technology innovation Program of Hunan Province
China Postdoctoral Science Foundation
Natural Science Foundation of Hunan Province Youth Project
Publisher
World Scientific Pub Co Pte Ltd
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics