摘要
针对低频声波的衰减问题,设计了一种基于局域共振(Local Resonance,LR)机理的带瓣型结构的声学超材料,并运用COMSOL有限元软件MULTIPHYSICS 4.3计算分析了所设计的结构元胞带隙特性及其振动特性,研究表明,所设计的声学超材料比无瓣型声学超材料带隙更宽,并且仅用单层结构同种元胞组合就可以在一定频率下形成较宽的多个完全带隙,而不需要通过不同种元胞组合或是多层结构的复合而达到一定带隙特性。在此基础上,进一步对所设计的声学超材料的几何尺寸进行了优化。
This paper proposes a petal-like acoustic metamaterial structure based on local resonance to solve the lowfrequency acoustic attenuation problem. The band structures and vibration characteristics of the designed material cell are analyzed with COMSOL MULTIPHYSICS 4.3. It is shown that the proposed petal-like metamaterial structure can generate band gap much wider than that of the structure without petals in low frequency range. Furthermore, the structure can produce several complete band gaps by only one kind of cell of a single layer rather than different cells and several layers. The paper also studies the problem on size optimization of the acoustic metamaterial structure.
出处
《声学技术》
CSCD
北大核心
2016年第3期222-227,共6页
Technical Acoustics
基金
镇江市科技支撑项目(GY2013052)
关键词
声学超材料
局域共振
声波带隙
acoustic metamaterial
local resonance
sonic band gap
作者简介
陈琳（1988-），女，甘肃定西人，硕士，研究方向为声学超材料、低频噪声控制。
通讯作者：吴卫国，E—mail：wuwg@ujs．edu．cn
