基于声学黑洞的复合隔声结构声学特性研究及试验  

Analysis and test of acoustic characteristics of the acoustic black hole based composite sound insulation structure

作　　者：余勇花 吴天歌 杨淇 叶锦啸 夏兆旺 YU Yonghua;WU Tiange;YANG Qi;YE Jinxiao;XIA Zhaowang(School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212100,Jiangsu,China;School of Ship and Ocean Engineering,Jiangsu Maritime Institute,Nanjing 211170,Jiangsu,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212003 [2]江苏海事职业技术学院船舶与海洋工程学院,江苏南京211170

出　　处：《声学技术》2023年第4期509-514,共6页Technical Acoustics

基　　金：江苏省自然科学基金(BK20191462);2021江苏省研究生创新计划(SJCX21-1776);热能动力技术重点实验室开放基金(TPL2020003)。

摘　　要：声学黑洞(Acoustic Black Hole,ABH)能够实现声波的聚集,通过粘贴阻尼层将其聚集的能量耗散,可有效降低声学黑洞复合结构的振动和声波的传递。针对中低频段噪声,设计了声学黑洞复合隔声结构,建立了其隔声量计算模型。研究了声学黑洞复合隔声结构的黑洞数量、黏弹性阻尼层、声学黑洞半径等参数对隔声性能的影响。研究结果表明:在160~1000 Hz频率范围内,ABH能明显增加复合隔声结构的隔声性能,其传递损失在1/3倍频程内增加了1.9 dB。文中的研究结果为复合隔声结构的设计提供了借鉴。Acoustic black hole(ABH)is capable of gathering sound waves.By pasting a damping layer on ABH to dissipate the energy it gathered before,the structural vibration and sound wave transmission of the composite sound insulation structure with ABH can be effectively reduced.For the noise in mid and low frequency bands,a composite sound insulation structure with ABH is designed and the calculation model of its sound transmission loss(STL)is established.The effects of ABH parameters,such as number and radius of black holes and adhesive elastic damping layer,on sound insulation performances are studied.The result shows that the sound insulation performance of the ABH based composite sound insulation structure is significantly improved in the range of 160−1000 Hz,with an average STL improvement of 1.9 dB compared with the normal composite sound insulation structure.The result in this paper provides a reference for the design of composite sound insulation structures.

关 键 词：声学黑洞(ABH) 隔声性能 复合隔声结构 阻尼层 

分 类 号：TB535[理学—物理]