嵌入金属填充物的复合结构声学覆盖层吸声特性研究  

Sound Absorption Performance of Composite Structural Acoustic Coatings Embedded with Metal Fillers

作　　者：应童 杨将政 陶猛[1] YING Tong;YANG Jiangzheng;TAO Meng(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学机械工程学院,贵阳550025

出　　处：《噪声与振动控制》2024年第5期56-61,119,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52265010);贵州省科学技术基金资助项目(黔科合基础[2020]1Z048)。

摘　　要：设计一种在声波入射端为半无限大水域工况下使用的,内含圆柱空腔、钨板以及铝制框架的复合结构声学覆盖层。利用仿真软件建立其有限元模型,对比该复合结构覆盖层与仅含空腔结构覆盖层的声学特性,同时通过两种覆盖层的位移云图对两者的位移变化特点及相应吸声机理进行分析,随后探究覆盖层的几何参数对其吸声性能的影响。研究表明,若以吸声系数0.95作为标准,该复合结构声学覆盖层具有8568 Hz的吸收范围,具有宽带、高吸声的特点。A composite structural acoustic coating containing a cylindrical cavity,a tungsten plate and an aluminum frame was designed for use in semi-infinite waterside conditions at the incident end of the acoustic wave.A finite element model was established using simulation software,and the result of acoustic properties of the composite structure coating was compared with those of the cavity-only structural coating.Meanwhile the displacement variation characteristics and the cor-responding sound absorption mechanism of the two coatings were analyzed by means of displacement clouds of the two coat-ings.Afterwards the influence of geometrical parameters of the coating on its sound absorption performance was detected.The study shows that the composite acoustic coating has an absorption range of 8568 Hz,namely has a wide bandwidth and high sound absorption ability if the absorption coefficient of 0.95 is taken as the standard.

关 键 词：声学 声学覆盖层 声学特性 复合结构 空腔 金属填充物 

分 类 号：TB564[交通运输工程—水声工程]