文章信息/Info

Title:

Research on Low Frequency Broadband Sound Absorption Metamaterial Based on Combined Micro-Perforated Plate

文章編號(hào):

1674-3962(2021)01-0029-05

作者:

吳飛1; 2; 陳文淵3; 巨澤港3; 古棋元3; 肖勇2; 郁殿龍2; 溫激鴻2

（1. 重慶大學(xué)汽車工程學(xué)院，重慶 400715）（2. 國(guó)防科技大學(xué)智能科技學(xué)院，湖南 長(zhǎng)沙 410073）（3. 西南大學(xué)工程技術(shù)學(xué)院，重慶 400715）

Author(s):

WU Fei1; 2;  CHEN Wenyuan3;  JU Zegang3;  GU Qiyuan3;  XIAO Yong2;  YU Dianlong2;  WEN Jihong2

(1. School of Automotive Engineering, Chongqing University, Chongqing 400715, China) （2. College of Intelligence Science, National University of Defense Technology, Changsha 410073, China) (3. College of Engineering and Technology, Southwest University, Chongqing 400715, China)

關(guān)鍵詞:

聲學(xué)超材料; 低頻寬帶; 微穿孔板; 雙吸收峰

Keywords:

acoustic metamaterial;  low frequency broadband;  micro�瞤erforated plate;  double absorption peaks

分類號(hào):

TU311.3;TB34

DOI:

10.7502/j.issn.1674-3962.202007018

文獻(xiàn)標(biāo)志碼:

A

摘要:

如何實(shí)現(xiàn)低頻寬帶吸聲，一直是噪聲控制工程領(lǐng)域亟待解決的問題之一，近年來聲學(xué)超材料的迅速發(fā)展為此提供了新的解決思路。將拓寬單個(gè)峰值吸聲帶寬與引入第二階吸收峰兩種方式有效結(jié)合，基于組合微穿孔板提出了一種低頻寬帶吸聲超材料，建立了組合微穿孔板吸聲結(jié)構(gòu)的吸聲理論模型與數(shù)值仿真模型，分析了其低頻寬帶吸聲機(jī)理。理論計(jì)算結(jié)果與數(shù)值計(jì)算結(jié)果吻合良好，驗(yàn)證了組合微穿孔板吸聲結(jié)構(gòu)的準(zhǔn)確性。該吸聲結(jié)構(gòu)在低頻范圍產(chǎn)生雙吸收峰，峰值都接近準(zhǔn)完美吸聲，同時(shí)具有兩個(gè)較寬的吸聲帶寬，結(jié)構(gòu)厚度滿足亞波長(zhǎng)尺度，展現(xiàn)出了良好的低頻寬帶吸聲特性。最后，通過嚴(yán)格的參數(shù)設(shè)計(jì)，僅耦合兩個(gè)吸聲單元后在250~900 Hz范圍內(nèi)得到了一個(gè)連續(xù)的吸聲頻帶，平均吸聲系數(shù)達(dá)到0.86，此時(shí)結(jié)構(gòu)最大厚度為70 mm。該吸聲結(jié)構(gòu)具有優(yōu)異的低頻寬帶吸聲特性以及豐富的可調(diào)性等特點(diǎn)，在噪聲控制工程領(lǐng)域具有一定的應(yīng)用前景。

Abstract:

How to achieve low frequency broadband sound absorption has always been one of the urgent problems in the field of noise control engineering. The rapid development of acoustic metamaterials in recent years has provided new solutions for this. In this paper, widening the single peak absorption bandwidth and introducing the second-order absorption peak was effectively combined to obtain a low frequency broadband sound absorption metamaterial based on the combined micro-perforated plate. Then both the theoretical and numerical simulation models of the structure of combined micro-perforated plate were established. The theoretical results agreed well with the numerical calculation results, which verified the accuracy of the proposed structure. The sound absorption structure can produce double absorption peaks in the low frequency range, and the value of the absorption peak was close to quasi-perfect sound absorption. At the same time, it had two wider absorption bandwidths, and the structure thickness fell in the range of sub�瞱avelength scale, exhibiting good low frequency broadband sound absorption property. Finally, through strict parameter design, a continuous sound absorption band was obtained in the range of 250~900 Hz by coupling only two sound absorption units. The average sound absorption coefficient of the structure reached 0.86, which corresponding to a maximum thickness of 70 mm. Holding the feature of excellent low frequency broadband sound absorption property and rich adjustability,the sound absorption structure will have certain application prospects in the field of noise control engineering.