三维曲折空间、超构复合阵列式消声器设计研究  

Design and Research of Three-dimensional Tortuous Space and Metastructure Composite Array Mufflers

作　　者：李坤 任东红 杨景惠 李羿江 徐刚 吴桐 LI Kun;REN Donghong;YANG Jinghui;LI Yijiang;XU Gang;WU Tong(Construction Branch of State Grid Shaanxi Eletric Power Co.,Ltd.,Xi′an 710075,China;Shaanxi Electric Power Design Institute Co.,Ltd.,China Energy Engineering Group,Xi′an 710043,China)

机构地区：[1]国网陕西省电力有限公司建设分公司,西安710075 [2]中国能源建设集团陕西省电力设计院有限公司,西安710043

出　　处：《噪声与振动控制》2024年第5期261-266,共6页Noise and Vibration Control

摘　　要：针对排风散热风机系统低频噪声难以消除的难题,基于声学超材料理论及阻抗排布设计方法,融合超材料的低频吸声量高与玻璃纤维棉高频吸声性能好的优点,设计一种具有三维曲折空间、超构复合的消声器单元,将多个不同吸声频率的单元进行组合及优化,提出一种阵列式消声器。有限元计算分析表明,在不改变结构外形的前提下,具有三维曲折空间、超构复合阵列式消声器较传统的阻性消声器在100及260~310Hz范围内具有5~26dB降噪效果的提升量,具有宽频带高效消声的性能,可用于工业级的大面积、大规模消声。The difficult problem of eliminating the low frequency noise in exhaust and heat dissipation fan system is studied.Based on the acoustic metamaterial theory and impedance layout design method,and combining the advantages of good low-frequency sound absorption of metamaterial and high-frequency sound absorption of glass fiber cotton,a threedimensional tortuous space and superstructural-composite muffler unit is designed.Multiple units with different sound absorption frequencies are combined and optimized and an array type silencer is proposed.The finite element analysis shows that,compared with the traditional resistance muffler,the three-dimensional torsional space and superstructure composite array muffler can improve the noise reduction effect by 5-26 dB at the frequency of 100 Hz and the range of 260-310 Hz.It has the advantage of wide band and efficient noise reduction and can be used for industrial large area and large-scale noise reduction.

关 键 词：声学 消声器 曲折空腔 声学超材料 玻璃纤维棉 传输损失 

分 类 号：TB535.2[理学—物理] X593[理学—声学]