阻抗解耦的管束穿孔板吸声性能分析  

Performance analysis of perforated panel with impedance-decoupling tube-bundles

作　　者：梅中建 李晓东[1,2] 吕亚东 程晓斌[1,2] 杨军[1,2] MEI Zhongjian;LI Xiaodong;LYU Yadong;CHENG Xiaobin;YANG Jun(Key Laboratory of Noise and Vibration Research,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院噪声与振动重点实验室(声学研究所),北京100190 [2]中国科学院大学,北京100049

出　　处：《声学学报》2025年第2期246-256,共11页Acta Acustica

基　　金：国家自然科学基金项目(10574139,51076162)资助。

摘　　要：针对吸声结构中声阻与声抗相互耦合影响阻抗匹配的问题,提出了一种阻抗可解耦的分段式管束穿孔板吸声结构。通过调节上段细管束和下段粗管的几何参数可实现对整体结构的声阻和声抗的解耦调控。理论和仿真结果表明,通过改变上段细管束的内径,可以调节结构的声阻,而声抗几乎不变,进而实现吸声频带宽度调节;通过改变下段粗管的长度,可以调节结构的声抗,而声阻相对变化较小,进而实现吸声峰频率调节。通过阻抗解耦可以优化宽频范围内的阻抗匹配效果,提升吸声性能,拓宽吸声频带的调节范围。实验验证了阻抗解耦调制吸声性能的有效性。To solve the problem of coupling of acoustic resistance and acoustic reactance which affects impedance matching in acoustic absorbers,a perforated panel structure with segmented impedance-decoupling tube-bundles(PP-IDTB)is proposed to realize the decoupling of acoustic resistance and acoustic reactance.The decoupling of the acoustic resistance and acoustic reactance of the PP-IDTB can be achieved by adjusting the geometrical parameters of the upper fine tube bundles and the lower thick tube.Theoretical and simulated results show that by changing the diameter of the upper thin tubes,the acoustic resistance can be changed,while the acoustic reactance remains constant,thus the frequency width of the absorption can be adjusted.The acoustic reactance varies with the length of the lower thick tube,while the acoustic resistance remains almost unchanged,thus the peak frequency of absorption can be adjusted.Moreover,impedance decoupling can improve the impedance matching effect in a wide frequency range,further enhance the performance of sound absorption,and broaden the adjustment range of the absorption band.The effectiveness of impedance decoupling in modulating the absorption performance of PP-IDTB is experimentally verified.

关 键 词：管束穿孔板 吸声性能 阻抗匹配 阻抗解耦 

分 类 号：TB5[理学—物理]