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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。
At present, acoustic barriers have been widely used in urban rail transit to reduce environmental noise. By analyzing the noise reduction principle of the sound barrier, the insertion loss of the sound barrier is calculated theoretically. Combined with the actual measurement of Xizhimen-Dazhongsi section of Beijing Subway Line 13, RAYNOISE acoustic simulation software was used to establish two more true rail transit models, and the ray tracing method was used to calculate the simulation. Several different types of structural noise barriers were inserted Loss of simulation value, analysis of its noise reduction characteristics. The results show that the Y-type sound barrier has the best overall noise reduction effect at the same height. Inverted L-type sound barrier in the economic availability and noise reduction effect also has considerable advantages.