本文選題：Helmholtz腔 + 聲學超材料��； 參考：《聲學技術》2017年04期

【摘要】：為有效控制低頻寬帶噪聲,設計了一種帶薄膜結構的Helmholtz腔聲學超材料。利用COMSOL軟件對其透射特性進行詳細分析,結果表明:不帶膜的原本的Helmholtz腔結構其透射系數雖在低頻范圍內可以得到峰值,但其結構尺寸較大,且頻帶很窄,而文中設計的聲學超材料結構的透射系數在低頻范圍可得到多個峰值,在相同結構尺寸下,與原本的Helmholtz腔結構相比,其固有頻率向低頻范圍內偏移,因而提高了結構的低頻隔聲效果,拓寬了結構的隔聲頻率帶寬。在此基礎上進一步研究了聲學超材料結構幾何參數對透射系數的影響,優(yōu)化了聲學超材料的結構幾何參數。
[Abstract]:In order to control the low frequency wideband noise, an acoustic supermaterial with thin film structure for Helmholtz cavity was designed. The transmission characteristics of Helmholtz cavity without film are analyzed in detail by COMSOL software. The results show that the transmission coefficient of the original Helmholtz cavity without film can be obtained in the low frequency range, but its structure size is large and the frequency band is very narrow. The transmission coefficient of the acoustic metamaterials designed in this paper can obtain multiple peaks in the low frequency range. At the same structure size, the natural frequency of the designed acoustic supermaterial structure is shifted to the low frequency range compared with the original Helmholtz cavity structure. Therefore, the low frequency sound insulation effect of the structure is improved, and the bandwidth of the structure sound insulation frequency is widened. On this basis, the influence of structural geometric parameters of acoustic metamaterials on transmission coefficient is further studied, and the structural geometric parameters of acoustic supermaterials are optimized.
【作者單位】： 江蘇大學土木工程與力學學院;
【分類號】：TB34
，

本文編號：2108918