华东交通大学学报2017，Vol.34Issue(3)：1-6,6.
高速铁路吸声声屏障插入损失影响因素的分析
Analysis on Influence Factors of Insertion Loss of Sound Absorption Noise Barrier in High-speed Railway
摘要
Abstract
In the semi-anechoic chamber, a vertical scale model of the sound absorption noise barrier was estab-lished in this study to explore influence factors including the thickness and density of different sound absorption material and the aperture ratio of different sound barrier panels. Based on German Head company's DATaRec4 DIC24 data acquisition instrument and ArtemiS data analysis software, it tested the noise reduction effects of sound absorption noise barriers respectively for acoustic panels in 25,35,45% panel aperture ratio and 60,80,100 mm thickness and 24,32,48 kg/m3 density, so as to analyze the influence of parameters on the inser-tion loss of acoustic barriers in high-speed railway. The results showed that with the increase of the aperture ra-tio of the noise barriers, the noise reduction effect of the noise barrier becomes more and more obvious under the condition of a certain height of the noise barrier, which supports that increasing the aperture ratio of the noise barrier panel is helpful for improving the noise reduction effect of the noise barrier;meanwhile, with the increase of the thickness of core material and the decrease of core material density, the noise reduction effect of the noise barrier is more significant, which indicates that increasing the thickness of core material and reducing the density of core material may improve the noise reduction effect of noise barriers.关键词
高速铁路/吸声声屏障/插入损失/影响因素Key words
high-speed railway/sound absorption noise barrier/insertion loss/influence factors分类
建筑与水利引用本文复制引用
罗文俊,徐海飞..高速铁路吸声声屏障插入损失影响因素的分析[J].华东交通大学学报,2017,34(3):1-6,6.基金项目
国家自然科学基金项目(51468021) （51468021）
江西省远航工程项目(S2014-65) （S2014-65）
江西省自然基金(20161BAB206160) （20161BAB206160）
