基于超结构的宽带三维全向吸声体的设计
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- 英文论文题名：Design of three-dimensional broadband acoustic omnidirectional absorbers based on metamaterials
- 论文作者：胡成博 ; 梁彬 ; 杨京 ; 程建春
- 英文论文作者：HU Cheng-bo ; LIANG Bin ; YANG Jing ; CHENG Jian-chun ; Institute of Acoustic ; Nanjing University
- 年：2016
- 作者机构：南京大学声学研究所;
- 论文关键词：声学超结构 ; 三维宽带全向吸声体 ; 分形结构
- 英文论文关键词：acoustic metamaterials ; three-dimensional broadband acoustic omnidirectional absorber ; fractal structure
- 会议召开时间：2016-10-28
- 会议录名称：2016年全国声学学术会议论文集
- 语种：中文
- 分类号：TB51
- 学会代码：OGSM
- 会议名称：2016年全国声学学术会议
- 会议地点：中国湖北武汉
- 主办单位：中国声学学会
- 学会名称：中国声学学会
- 页数：3
- 文件大小：330k
- 原文格式：D
- 会议级别：全国
摘要
我们利用分形结构的概念设计了一个基于超结构宽带三维全向吸声体,来增大阻抗匹配的吸声核的吸声截面。该结构能够将任意方向入射的声波重新导向,使其沿着结构的径向传播。该结构的几何参数不随几何尺寸的改变而改变,适用于任意尺度的吸声体,并易于利用常见声学硬材料实现。这种基于声学超结构的吸声体在很多领域都有着应用前景,例如能量收集、噪声控制等。
By using the conception of fractal structure, we design a three-dimensional broadband acoustic omnidirectional absorber(AOA) based on metamaterials to enlarge the absorption cross-section of a smaller core with mathched acoustic impedance. The structure can redirect the incident waves with random direction and confine the acoustic waves in the radial direction. The structure will not require a complex redesign of parameters if the size changed and can be realized easily by common hard materials. Such metamaterial-based acoustic absorbers may have potential applications in various fields such as acoustic energy concentration, noise control, etc.
By using the conception of fractal structure, we design a three-dimensional broadband acoustic omnidirectional absorber(AOA) based on metamaterials to enlarge the absorption cross-section of a smaller core with mathched acoustic impedance. The structure can redirect the incident waves with random direction and confine the acoustic waves in the radial direction. The structure will not require a complex redesign of parameters if the size changed and can be realized easily by common hard materials. Such metamaterial-based acoustic absorbers may have potential applications in various fields such as acoustic energy concentration, noise control, etc.
引文
[1]Gu Z,Liang B,Li Y,et al.Experimental realization of broadband acoustic omnidirectional absorber by homogeneous anisotropic metamaterials[J].Journal of Applied Physics,2015,117(7):074502.
[2]Wang,M;Pan,N(2008)."Predictions of effective physical properties of complex multiphase materials".Materials Science and Engineering:R:Reports 63:1.doi:10.1016/j.mser.2008.07.001.
[3]Torrent D,Sánchez-Dehesa J.Anisotropic mass density by two-dimensional acoustic metamaterials[J].New journal of physics,2008,10(2):023004.
[4]Schoenberg M,Sen P N.Properties of a periodically stratified acoustic half‐space and its relation to a Biot fluid[J].The Journal of the Acoustical Society of America,1983,73(1):61-67.
[5]Li J,Fok L,Yin X,et al.Experimental demonstration of an acoustic magnifying hyperlens[J].Nature materials,2009,8(12):931-9
[2]Wang,M;Pan,N(2008)."Predictions of effective physical properties of complex multiphase materials".Materials Science and Engineering:R:Reports 63:1.doi:10.1016/j.mser.2008.07.001.
[3]Torrent D,Sánchez-Dehesa J.Anisotropic mass density by two-dimensional acoustic metamaterials[J].New journal of physics,2008,10(2):023004.
[4]Schoenberg M,Sen P N.Properties of a periodically stratified acoustic half‐space and its relation to a Biot fluid[J].The Journal of the Acoustical Society of America,1983,73(1):61-67.
[5]Li J,Fok L,Yin X,et al.Experimental demonstration of an acoustic magnifying hyperlens[J].Nature materials,2009,8(12):931-9