Helmholtz声学超材料带隙特性分析  

Helmholtz acoustic metamaterial band gap characterization

作　　者：钟可欣 孙维鹏[1] 赵道利[1] 刘园园 马薇[1] 谭婷 ZHONG Kexin;SUN Weipeng;ZHAO Daoli;LIU Yuanyuan;MA Wei;TAN Ting(Institute of Water Resources and Hydro-electric Engineering,Xi′an University of Technology,Xi′an 710048,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《哈尔滨工程大学学报》2022年第9期1356-1361,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52179089);航空科学基金项目(2020Z024057001)。

摘　　要：为了有效抑制和调控特定频率范围内的声音,本文提出了一种具有Helmholtz谐振腔的声学超材料,通过有限元分析了其能带结构和传输谱,通过对带隙边缘本征模的研究,分析了带隙形成机理,研究了Helmholtz谐振腔的结构参数对能带结构的影响。结果表明:能带结构和传输谱中衰减频率范围基本一致;随着Helmholtz声学超材料内颈(内腔)半径、内颈(内腔)高度和腔体的改变,带隙的起始频率、截止频率和带宽均有增大或减小的变化趋势。对该结构的带隙特性研究,拓宽了对Helmholtz声学超材料的设计和研究思路。To effectively suppress and modulate the sound in a specific frequency range,a type of acoustic metamaterial with a Helmholtz resonant cavity is proposed,and its energy band structure and transmission spectrum are analyzed by the finite element method.Moreover,the influence of structural parameters of the Helmholtz resonant cavity on the energy band structure is examined through the study of the band gap edge eigenmode and the analysis of the band gap formation mechanism.The results show that the decay frequency range in the energy band structure and transmission spectrum is essentially the same.Moreover,with the changing inner neck(inner cavity)radius and height and the cavity of the Helmholtz acoustic metamaterials,the onset frequency,cutoff frequency,and bandwidth of the band gap tend to increase or decrease.The study of the bandgap characteristics of this structure broadens the design and research ideas of Helmholtz acoustic metamaterials.

关 键 词：Helmholtz谐振腔 声学超材料 能带结构 传输谱 带隙 局域共振 带宽 腔体结构参数 

分 类 号：O735[理学—晶体学]