可调谐的宽频带负体弹模量吸声超构材料

陈怀军; 赵文霞; 郝长春

doi:10.3788/YJYXS20153002.0234

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可调谐的宽频带负体弹模量吸声超构材料

材料物理和化学 | 更新时间：2020-08-12

- 可调谐的宽频带负体弹模量吸声超构材料
- Tunable broadband sound absorbing metamaterial with negative modulus
- 液晶与显示 2015年30卷第2期页码：234-239
- 作者机构：
  
  1. 宁夏师范学院物理与信息技术学院,宁夏固原,756000
  2. 陕西师范大学物理学与信息技术学院,陕西西安,710119
- 作者简介：
- 基金信息：
  
  国家自然科学基金(No.21402114)();宁夏自然科学基金(No.NZ13209,No.N214277)();宁夏高等学校科学研究项目(No.NGY2013109
- DOI：10.3788/YJYXS20153002.0234
  中图分类号： O0429
- 收稿日期：2014-10-13，
  
  修回日期：2014-10-25，
  
  网络出版日期：2014-11-05，
  
  纸质出版日期：2015-04-05
- 稿件说明：
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陈怀军, 赵文霞, 郝长春. 可调谐的宽频带负体弹模量吸声超构材料[J]. 液晶与显示, 2015,30(2): 234-239

CHEN Huai-jun, ZHAO Wen-xia, HAO Chang-chun. Tunable broadband sound absorbing metamaterial with negative modulus[J]. , 2015,30(2): 234-239
陈怀军, 赵文霞, 郝长春. 可调谐的宽频带负体弹模量吸声超构材料[J]. 液晶与显示, 2015,30(2): 234-239 DOI： 10.3788/YJYXS20153002.0234.

CHEN Huai-jun, ZHAO Wen-xia, HAO Chang-chun. Tunable broadband sound absorbing metamaterial with negative modulus[J]. , 2015,30(2): 234-239 DOI： 10.3788/YJYXS20153002.0234.

摘要

以局域共振思想为理论基础、亥姆霍兹共振器为结构单元

设计了一种可调谐的负体弹模量宽频带吸声超构材料。通过调节亥姆霍兹共振器开口孔径大小

调节超构材料的谐振频率。利用COMSOL多物理场仿真软件

模拟计算声学超构材料的透射谱;通过提取参数法

计算声学超构材料的体弹模量。计算结果表明:在谐振频率附近声学超构材料在实现负体弹模量的同时

还具有优良的吸声性能;将双层亥姆霍兹共振器周期性排列

构建了一种频率范围在970 ~1 300 Hz的宽频带吸声超构材料。在吸声频带内

声透过率最低达到-22 dB

吸声效果良好。采取将不同谐振频率亥姆霍兹谐振单元多层排列的方式构建超构材料

可以实现可听声频段任意带宽的负体弹模量和吸声。这种声学超构材料的提出能为宽频带负体弹模量吸声超构材料的设计提供一种全新的思路。

Abstract

Based on the concept of local resonance

a kind of tunable broadband sound absorption metamaterial consisting of helmholtz resonator (HR) with negative modulus was designed. The resonant frequency of the metamaterial can be tuned by changing the bore diameter drilled in the HR. The transmission curve of the metamaterial was simulated by using COMSOL Multiphysics

and then the modulus of the metamaterial can be obtained via extraction method. Simulation results confirm that the present metamaterial can accomplish negative modulus at the resonant frequency

simultaneously showing excellent property of sound absorption. A kind of metamaterial with broadband sound absorption from 970 to 1 300 Hz was constructed by periodically arraying two layers of HRs. Excellent sound absorption appears in the sound absorption band with minimum transmission -22 dB. Metamaterial with any wanted bandwidth of negative modulus and sound absorption in audio-frequency range can be obtained by periodically arraying multilayers of HRs with different resonant frequencies. It is expected that the proposed metamaterial will significantly contribute to the design of broadband negative modulus and sound absorption metamaterial.

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Keywords

references

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