闭孔泡沫铝声屏障的降噪效果研究  

Study on Denoising Effect of Sound Barriers Made from Closed-Cell Aluminum Foam

作　　者：梁李斯[1] 姚广春[1] 穆永亮[1] 王磊[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第2期274-276,共3页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2008AA03Z512);国家自然科学基金资助项目(50774021)

摘　　要：用闭孔泡沫铝板作为高速公路声屏障材料,以沈阳市东西快速干道珠林桥附近安装的几段声屏障为例,对高速公路安装声屏障前后噪声的声压级进行了实地测量,计算得出声屏障的插入损失,以此考察闭孔泡沫铝板声屏障的降噪效果.通过对闭孔泡沫铝声屏障和普通百叶声屏障降噪效果的对比分析,发现闭孔泡沫铝声屏障整体降噪效果优于普通百叶声屏障,在高速公路噪声较强的20～630 Hz频段降噪效果更佳.The denoising effect of the sound barriers made from closed-cell aluminum foam was investigated taking some sections of the sound barriers located nearby the Zhulin Overcross of the East-West expressway in Shenyang City as examples,where the sound pressure level of noise was measured with spectrum analysis before and after setting the sound barriers there.The denoising effect of closed-cell aluminum foam was evaluated via the insertion loss calculated for such sound barriers.A comparative denoising analysis of sound barrier was made between the closed-cell aluminum foam and conventional window shutters,and the results showed that the denoising effect of the former is superior to that of the latter,especially in the highly-noisy frequency band from 20 to 630A4!Hz beside the expressway.

关 键 词：降噪 闭孔泡沫铝 频谱分析 声屏障 插入损失 

分 类 号：U412.366[交通运输工程—道路与铁道工程]