基于低频吸声超构材料的复合消声器  

Composite muffler based on low-frequency sound absorbing metamaterials

作　　者：陈键 李治含 黄唯纯 钟雨豪 陈龙虎 卢明辉[1] 陈延峰[1] CHEN Jian;LI Zhihan;HUANG Weichun;ZHONG Yuhao;CHEN Longhu;LU Minghui;CHEN Yanfeng(National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京大学固体微结构物理国家重点实验室现代工程与应用科学学院,南京210093

出　　处：《应用声学》2024年第1期95-99,共5页Journal of Applied Acoustics

基　　金：国家重点研发计划项目(2021YFB3801800,2018YFA0306200,2017YFA0303702);国家自然科学基金项目(11890700,51732006,11625418)。

摘　　要：针对管道内低频噪声难以抑制的问题,基于亥姆霍兹共振腔阵列吸声板和穿孔管消声器组合,设计了一种复合式宽带消声器。首先利用有限元法仿真分析传统穿孔管消声器,发现中低频消声能力较差,通过嵌入亥姆霍兹共振腔阵列吸声板吸收中低频噪声。采用仿真与实验的方式研究吸声板的声学性能:在400∼1000 Hz频段内的平均吸声系数达到了0.88。然后对复合式消声器进行数值模拟及3D打印阻抗管实验测试对比:复合式消声器在400∼1718 Hz频率范围内的平均传递损失为18.15 dB。最终实现了管道内全频带噪声有效控制。To solve the problem of low-frequency noise in pipeline, a composite broadband muffler is designed based on the combination of Helmholtz resonant cavity (HR) array sound-absorbing plate and perforated tube muffler. Firstly, the finite element method is used to simulate and analyze the traditional perforated tube muffler, and it is found that the noise attenuation ability is poor in the middle and low frequency. Simulation and experiment were used to study the acoustic performance of the sound absorption board: the average sound absorption coefficient reached 0.88 in the 400-1000 Hz frequency band. Then, numerical simulation and 3D printed impedance tube test were carried out for the composite muffler: the average transfer loss of the composite muffler was 18.15 dB in the frequency range of 400-1718Hz, and the effective control of full-frequency noise in the pipeline was finally realized.

关 键 词：管道低频噪声 亥姆霍兹共振腔阵列 穿孔管消声器 复合式消声器 全频带 

分 类 号：O429[理学—声学]