非对称声学超材料的各向异性反射特性及等效参数

徐宜才; 吴九汇

doi:10.7652/xjtuxb202101001

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非对称声学超材料的各向异性反射特性及等效参数

更新时间：2025-07-09

- 非对称声学超材料的各向异性反射特性及等效参数
- Anisotropic Reflection Characteristics and Equivalent Parameters of Asymmetric Acoustic Metamaterials
- 西安交通大学学报 2021年55卷第1期页码：1-9
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2020-06-24。作者简介: 徐宜才(1992—),男,博士生;吴九汇(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(51675401)
- DOI：10.7652/xjtuxb202101001
  中图分类号： TB52
- 网络首发：2021-01-10，
  
  纸质出版：2021
- 稿件说明：
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徐宜才, 吴九汇. 非对称声学超材料的各向异性反射特性及等效参数[J]. 西安交通大学学报, 2021,55(1):1-9.

Anisotropic Reflection Characteristics and Equivalent Parameters of Asymmetric Acoustic Metamaterials[J]. 2021, 55(1): 1-9.
徐宜才, 吴九汇. 非对称声学超材料的各向异性反射特性及等效参数[J]. 西安交通大学学报, 2021,55(1):1-9. DOI： 10.7652/xjtuxb202101001.

Anisotropic Reflection Characteristics and Equivalent Parameters of Asymmetric Acoustic Metamaterials[J]. 2021, 55(1): 1-9. DOI： 10.7652/xjtuxb202101001.

摘要

针对非对称声学超材料的异常声学特性问题

设计了材料非对称、几何非对称和共振非对称3种结构

深入研究了各向异性反射特性及等效参数的产生机理。通过仿真和实验研究了3种非对称声学超材料的声学特性

研究表明当材料非对称和几何非对称形成非对称共振特性时

可实现各向异性的反射相位

考虑材料损耗下还可进一步实现各向异性的反射幅值。非对称共振特性还产生了各向异性的等效参数

进而提出了改进的直接法来求解非对称声学超材料的统一等效参数

求解的统一等效参数和透射幅值存在对应关系并且满足被动材料的要求

验证了该方法的正确性。该研究结果可为设计具有零反射的声学器件提供一定的参考。

Abstract

Three types of asymmetric acoustic metamaterials

i.e.

with material asymmetry

geometrical asymmetry

and resonant asymmetry

are designed to achieve abnormal acoustic characteristics

and the formation mechanisms for anisotropic reflection characteristics and equivalent parameters are systematically studied. Acoustic properties of the three types of asymmetric acoustic metamaterials are studied by simulation and experiment

and The experimental results show that anisotropic reflection phase can be realized when material asymmetry and geometrical asymmetry form asymmetric resonance characteristics

and anisotropic reflection amplitude can be further realized by considering material loss. Asymmetric resonance characteristics also produce anisotropic equivalent parameters

and a modified direct method is proposed to obtain unified equivalent parameters for asymmetric acoustic metamaterials. The calculated unified equivalent parameters have a corresponding relationship with amplitude of transmission and meet the requirements of passive materials

which validates the correctness of the method. The present work can provide some references for the realization of acoustic devices with zero reflection.

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references

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