声学超结构低频宽带协同耦合高效吸声机理

吴晓; 刘崇锐; 王轲; 蔡永庆; 吴九汇

doi:10.7652/xjtuxb201910017

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声学超结构低频宽带协同耦合高效吸声机理

更新时间：2025-07-09

- 声学超结构低频宽带协同耦合高效吸声机理
- Low-Frequency Broadband Synergistic Coupling Mechanism of Acoustic Metamaterials with High Efficiency Absorption
- 西安交通大学学报 2019年53卷第10期页码：122-127
- 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：
  
  : 2019-03-28。作者简介: 吴晓(1996—),女,硕士生;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/xjtuxb201910017
  中图分类号： O422.4
- 网络首发：2019-10-10，
  
  纸质出版：2019
- 稿件说明：
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吴晓, 刘崇锐, 王轲, 等. 声学超结构低频宽带协同耦合高效吸声机理[J]. 西安交通大学学报, 2019,53(10):122-127.

Low-Frequency Broadband Synergistic Coupling Mechanism of Acoustic Metamaterials with High Efficiency Absorption[J]. 2019, 53(10): 122-127.
吴晓, 刘崇锐, 王轲, 等. 声学超结构低频宽带协同耦合高效吸声机理[J]. 西安交通大学学报, 2019,53(10):122-127. DOI： 10.7652/xjtuxb201910017.

Low-Frequency Broadband Synergistic Coupling Mechanism of Acoustic Metamaterials with High Efficiency Absorption[J]. 2019, 53(10): 122-127. DOI： 10.7652/xjtuxb201910017.

摘要

针对传统材料难以有效控制低频噪声的问题

提出了一种膜类带腔声学超结构的低频宽带协同耦合高效吸声机理。这种超结构有多个吸声单元

每个吸声单元由两个铝片组成

铝片固定在空气腔上方的硅胶薄膜上。首先利用有限元软件COMSOL Multiphysics 5.3计算单元胞的吸声特性

确定吸声结构的尺寸和材料参数; 然后通过两元胞结构分析振动模态和吸声机理

解决吸声结构窄带的问题

再分析典型结构参数对协同耦合机理和吸声特性的具体影响规律; 最后通过多单元的协同耦合

实现整个频率范围内的宽带吸声。仿真结果表明:通过设计多个单元的协同耦合

可以将不同单元之间的吸声峰值相互错开

使结构的吸声系数在整个低频范围内均匀分布

实现200～1 000 Hz范围内连续的吸声宽带

平均吸声系数为80%左右

实现低频大宽带的优异吸声性能。该研究结果可为低频宽带吸声材料的设计提供一种新的思路

在控制振动和噪声方面具有潜在的应用前景。

Abstract

A low-frequency broadband synergistic coupling mechanism of membrane-type metamaterials with high efficiency absorption is proposed to solve the problem that traditional materials are difficult to effectively control low-frequency noise.This kind of membrane-type metamaterials consists of multiple units

each unit is composed of two aluminum platelets

and each platelet is fastened on a piece of silicone membrane above an air cavity.Finite element software COMSOL Multiphysics 5.3 is used to calculate the absorption characteristics to determine the structure si-e and material parameters of the cell.Then the vibration mode and mechanism are analy-ed by two cells to solve the narrow band.The influence of typical structural parameters on synergetic coupling mechanism and absorption characteristics is discussed.The broadband sound absorption in the whole frequency range is reali-ed via synergetic coupling of multiple units.The simulations show that the absorption peaks of units can be stagg

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references

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