| 一种基于局域共振的低频超宽带隙瓣状声学超材料 |
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| 引用本文： | 陈琳,吴卫国,周榕. 一种基于局域共振的低频超宽带隙瓣状声学超材料[J]. 声学技术, 2016, 35(3): 222-227 |
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| 作者姓名： | 陈琳 吴卫国 周榕 |
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| 作者单位： | 江苏大学土木工程与力学学院, 江苏 镇江 212013;江苏大学土木工程与力学学院, 江苏 镇江 212013;江苏大学土木工程与力学学院, 江苏 镇江 212013 |
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| 基金项目： | 镇江市科技支撑项目(GY2013052) |
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| 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。
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| 关 键 词： | 声学超材料 局域共振 声波带隙 |
| 收稿时间： | 2015-11-13 |
| 修稿时间： | 2016-02-13 |
A petal-like acoustic metamaterial structure based on local resonance with ultra-wide sonic band gap in low frequency range |
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| CHEN Lin,WU Wei-guo and ZHOU Rong. A petal-like acoustic metamaterial structure based on local resonance with ultra-wide sonic band gap in low frequency range[J]. Technical Acoustics, 2016, 35(3): 222-227 |
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| Authors: | CHEN Lin WU Wei-guo ZHOU Rong |
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| Affiliation: | Jiangsu University, School of Civil and Mechanics Engineering, Zhenjiang 212013, Jiangsu, China;Jiangsu University, School of Civil and Mechanics Engineering, Zhenjiang 212013, Jiangsu, China;Jiangsu University, School of Civil and Mechanics Engineering, Zhenjiang 212013, Jiangsu, China |
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| Abstract: | This paper proposes a petal-like acoustic metamaterial structure based on local resonance to solve the low-frequency 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. |
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| Keywords: | acoustic metamaterial local resonance sonic band gap |
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