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A parameter design method for multifrequency perfect sound-absorbing metasurface with critical coupled Helmholtz resonator
Journal of Low Frequency Noise, Vibration and Active Control ( IF 2.368 ) Pub Date : 2021-05-30 , DOI: 10.1177/14613484211019610
Sun Wei 1 , Li Li 2, 3 , Chu Zhigang 1 , Li Linyong 2, 3 , Fan Xiaopeng 2, 3
Affiliation  

The low-frequency harmonic components of urban substation noise are easy to annoy the residents. Multi-frequency perfect sound-absorbing metasurface based on the Helmholtz resonator (HR) is an alternative solution to suppress the low-frequency harmonic noise. This paper proposes an efficient design method of structural parameter for the multi-frequency perfect sound-absorbing metasurface. Taking the perfect sound absorption at the target frequency as objective and the structural parameters of HR as optimization variables, the structural parameter optimization model of multi-frequency perfect sound-absorbing metasurface is established and solved by the sequential quadratic programming algorithm. The proposed design method effectively overcomes the deterioration of sound absorption performance caused by the combined design of multiple perfect sound absorption units. Utilizing the proposed method, we designed a multi-frequency perfect sound-absorbing metasurface to absorb the four harmonic components of an urban substation noise simultaneously. The finite element simulation results and the experimental results of the physical sample indicate that the designed multi-frequency perfect sound-absorbing metasurface can satisfy critical coupling to achieve perfect sound absorption at all target frequencies.



中文翻译:

临界耦合亥姆霍兹谐振腔多频完美吸声超表面参数设计方法

城市变电站噪声的低频谐波成分容易使居民烦恼。基于亥姆霍兹谐振器(HR)的多频完美吸音超表面是抑制低频谐波噪声的替代解决方案。本文提出了一种高效的多频完美吸声超表面结构参数设计方法。以目标频率下的完美吸声为目标,以HR的结构参数为优化变量,建立多频完美吸声超表面结构参数优化模型,并采用序列二次规划算法求解。所提出的设计方法有效克服了多个完美吸声单元组合设计导致吸声性能下降的问题。利用所提出的方法,我们设计了一个多频完美的吸声超表面,以同时吸收城市变电站噪声的四个谐波分量。有限元仿真结果和物理样品的实验结果表明,所设计的多频完美吸音超表面可以满足临界耦合,在所有目标频率下都能实现完美吸音。

更新日期:2021-05-30
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