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工程设计学报
Chinese Journal of Engineering Design  2021, Vol. 28 Issue (4): 521-526    DOI: 10.3785/j.issn.1006-754X.2021.00.050
General Parts Design     
Design and performance study of acoustic attenuation structure of perforated tube coupled with metamaterial film
CHEN Long-hu, HAN Dong, ZHANG Wen-hui, YE Jun-jie, ZHANG Jing-hui, MA Zhi-yu
College of Mechanical Engineering， North University of China， Taiyuan 030051， China
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Abstract  In view of the large size of the muffler used to reduce the broadband low-frequency noise, and its poor noise acoustic attenuation performance, based on the broadband acoustic attenuation characteristic of the perforated tube and the good acoustic attenuation performance of the membrane structure for low-frequency noise, an acoustic attenuation structure of perforated tube coupled with metamaterial film was designed. The acoustic attenuation mechanism of acoustic attenuation structure was analyzed, and the influence of the structural parameters on acoustic attenuation performance was analyzed by simulation. The results showed that the higher the coupling strength between the acoustic wave in the main pipe and the resonance system of acoustic attenuation structure, the stronger the vibration of the film, the stronger the acoustic wave reflected back to the upstream pipe, and the weaker the acoustic wave transmitted to the downstream pipe; the frequency corresponding to transmission loss peak of acoustic attenuation structure was closely related to the first resonant frequency of metamaterial film. The spiral acoustic attenuation structure was designed, and its performance was simulated and tested. The results showed that the simulation result was in good agreement with the experimental result. The research results provide a useful reference for the control of broadband low-frequency noise.

Received: 04 November 2019      Published: 28 August 2021
CLC:  TH 703  
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CHEN Long-hu, HAN Dong, ZHANG Wen-hui, YE Jun-jie, ZHANG Jing-hui, MA Zhi-yu. Design and performance study of acoustic attenuation structure of perforated tube coupled with metamaterial film. Chinese Journal of Engineering Design, 2021, 28(4): 521-526.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2021.00.050     OR     https://www.zjujournals.com/gcsjxb/Y2021/V28/I4/521


穿孔管与超材料薄膜耦合的消声结构的设计及性能研究

用于消减宽频带低频噪声的消声器的结构尺寸较大，且消声性能较差。因此，利用穿孔管的宽带消声特性和膜结构对低频噪声良好的消声性能，设计了穿孔管与超材料薄膜耦合的消声结构。分析了消声结构的消声机理，仿真分析了消声结构参数对消声性能的影响。结果表明：主管道内声波与消声结构谐振系统的耦合强度越大，薄膜的振动越剧烈，反射回上游管道的声波越强，则传入下游管道的声波越弱；消声结构传递损失峰值所对应的频率与超材料薄膜的第1阶共振频率基本一致。设计了螺旋形消声结构，对其消声性能进行仿真和实验测试，结果表明仿真结果与实验结果吻合较好。研究结果可为宽频带低频噪声的控制提供有益参考。
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