摘要
目前,声屏障已经广泛用于城市轨道交通来降低环境噪声。通过分析声屏障的降噪原理,理论计算出声屏障的插入损失。结合对北京地铁13号线西直门至大钟寺区间的实际测量情况,运用RAYNOISE声学仿真软件建立较为真实的两种轨道交通模型,应用射线跟踪法计算仿真,得到几种不同结构形式声屏障的插入损失仿真值,分析其降噪特性。结果表明,在同等高度下,Y型声屏障的整体降噪效果最佳。倒L型声屏障在经济实用性和降噪效果方面也有相当的优势。
Sound barrier has been widely used in urban rail transit to reduce ambient noise.Insertion loss of noise barrier is theoretically calculated according to the principle of noise reduction of sound barrier.Combined with the actual measurement of Beijing Subway Line 13 Xizhimen to Dazhongsi interval,two kinds of more realistic rail transit models are established by the acoustic simulation software RAYNOISE.Using advanced ray-tracing methods,the noise characteristics of several different structure forms of noise barrier are analyzed and the insertion loss simulation value is got.The result indicates that Y-shaped sound barrier works best overall on noise reduction at the same height.And inverted L-shaped sound barrier also has a considerable advantage in economy,practicality and noise reduction effect.
出处
《环境工程》
CAS
CSCD
北大核心
2014年第S1期1005-1008,1012,共5页
Environmental Engineering
