Low-Frequency Broadband Absorption Mechanism of High-OrderMicro-Perforated Meta-Materials

GUO Mengyuan; LIU Chongrui; SU Wenbin; FAN Shengping

doi:10.7652/xjtuxb202404018

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Low-Frequency Broadband Absorption Mechanism of High-OrderMicro-Perforated Meta-Materials

更新时间：2025-07-09

- Low-Frequency Broadband Absorption Mechanism of High-OrderMicro-Perforated Meta-Materials
- Vol. 58, Issue 4, Pages: 192-199(2024)
- 作者机构：
  
  1. 西安交通大学机械工程学院,西安,710049
  2. 广东电网有限责任公司电力科学研究院,广州,510080
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202404018
  CLC： O424;TB34
- Online First：10 April 2024，
  
  Published：2024
- 稿件说明：
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GUO Mengyuan, LIU Chongrui, SU Wenbin, et al. Low-Frequency Broadband Absorption Mechanism of High-OrderMicro-Perforated Meta-Materials[J]. 2024, 58(4): 192-199.
DOI：

GUO Mengyuan, LIU Chongrui, SU Wenbin, et al. Low-Frequency Broadband Absorption Mechanism of High-OrderMicro-Perforated Meta-Materials[J]. 2024, 58(4): 192-199. DOI： 10.7652/xjtuxb202404018.

摘要

针对现有低频噪声控制的迫切需要

提出了一种高阶微穿孔型超材料结构

解释了其低频宽带吸声机理

并设计了新型的高阶微穿孔型低频宽带吸声超材料

在300～3 000 Hz的频率范围内表现出连续优异的吸声特性。设计了单个单元的吸声结构

通过在传统的微穿孔超材料内部增加穿孔板的方式

激发高阶特性

对比发现

高阶微穿孔型超材料实现了对高阶峰值的灵活调整。使用理论公式和有限元仿真

建立单元结构的计算模型计算单元的吸声系数

对结构进行吸声机理分析

同时分析了典型结构参数对于吸声特性的影响规律; 在此基础上

通过单元间的严格耦合

设计了一种9单元宽带吸声结构

并进行实验验证。实验结果表明

该材料总体厚度为106.1 mm

在300～3 000 Hz的频率范围内获得了连续优异的带宽

平均吸声系数达到90%以上。该结构具有亚波长厚度的低频宽带吸声特性

在汽车、飞机、轮船等噪声环境中

具有广阔的减震降噪的工程应用前景。

Abstract

Regarding the pressing need for low-frequency noise control

a high-order micro-perforated meta-material structure is proposed to elucidate its mechanisms of low-frequency broadband absorption. Furthermore

new high-order micro-perforated low-frequency broadband absorption meta-materials are designed

exhibiting a continuous excellent absorption spectrum within the frequency range of 300—3 000 Hz. Initially

the sound absorption structure of a single cell is designed to stimulate high-order characteristics through the addition of perforated plates inside the traditional micro-perforated meta-materials. The comparison reveals that such materials can flexibly adjust the high-order peaks. To calculate the sound absorption coefficient and analyze the sound absorption mechanism of the structure

a calculation model of the cell structure is established through the application of theoretical formulas and finite element simulations. The influence of typical structural parameters on sound absorption characteristics is analyzed. On this basis

a 9-cell broadband sound absorption structure is designed through strict coupling between cells. The experimental results show that the continuous excellent bandwidth is achieved within the frequency range of 300-3 000 Hz

with an average sound absorption coefficient of above 90% and a thickness of 106.1 mm. The structure is characterized by low-frequency broadband sound absorption with sub-wavelength thickness and enjoys promising prospects for shock absorption and noise reduction engineering applications in noisy environments

such as automobiles

aircraft

and ships.

关键词

Keywords

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