内置穿孔隔板单层非均匀微穿孔板吸声结构的设计与分析  

Design and Analysis of Sound Absorber of Single-layer Inhomogeneous Micro-perforated Panel with Built-in Perforated Partition

作　　者：李贺铭 吴锦武[1] 兰晓乾 杜西立 毛崎波[1] LI He-ming;WU Jin-wu;LAN Xiao-qian;DU Xi-li;MAO Qi-bo(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学飞行器工程学院,南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2022年第3期134-140,共7页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：国家自然科学基金(51965041);南昌航空大学研究生创新专项(YC2021-053)。

摘　　要：微穿孔板吸声体作为一种高效吸声结构在噪声控制领域具有巨大应用潜力。但传统微单层穿孔板吸声带宽较窄难以应对多变的噪声环境,为此本文提出了一种内置穿孔隔板非均匀微穿孔板吸声体结构。首先建立了内置穿孔隔板非均匀微穿孔板吸声结构的等效电路模型并进行了理论分析,然后运用COMSOL Multiphysics有限元软件对吸声体结构进行了参数仿真研究,最后进行了实验分析。结果表明:通过增加穿孔隔板可有效调节吸声体声阻抗,从而拓宽吸声体结构的吸声带宽。本文的研究成果可为微穿孔板吸声体推广应用提供新思路。Micro-perforated panel sound absorber(MPA)as an efficient sound absorption structure has great potential for the application in the field of noise control.However,the conventional single-layer micro-perforated panel(MPP)is difficult to respond to the variable noise environment due to its narrow sound absorption band.Therefore,a single-layer inhomogeneous micro-perforated panel sound absorber with built-in perforated partition was proposed in this work.Firstly,the equivalent circuit model of the proposed acoustic structure was established and analyzed theoretically.And then the parametric simulation study of the structure was conducted with COMSOL Multiphysics finite element software,followed by the experimental analysis.The analysis results show that the partition perforation can adjust the acoustic impedance of the absorber effectively,therefore broadening the absorption bandwidth of the absorber structure.This work provides new ideas for the popularization and application of micro-perforated panel absorbers.

关 键 词：非均匀微穿孔板 隔板 宽带吸声 噪声控制 

分 类 号：TB132[理学—物理]