我国铁路声屏障发展概况  

The Research and Development Survey of Railway Sound Barriers in China

作　　者：辜小安[1] 郭怀勇[1] 周铁军[1] 尹皓[1] 

机构地区：[1]中国铁道科学研究院节能环保劳卫研究所,北京100081

出　　处：《铁路节能环保与安全卫生》2015年第4期143-147,共5页Railway Energy Saving & Environmental Protection & Occupational Safety and Health

基　　金：中国铁路总公司科技研究开发计划项目(编号:2013B001-A-2);中国铁道科学研究院科技研究开发计划项目(编号:2014YJ035)

摘　　要：本文回顾了我国铁路声屏障发展历程。通过对既有铁路声屏障材料分类及声学性能测试，得到金属声屏障材料的计权隔声量Rw在19～44dB间，非金属声屏障材料Rw在26～45dB间，金属声屏障降噪系数NRC在0．3～1．1间，非金属声屏障材料NRC在0．7—0．9间，其隔、吸声性能对应于频率为315～3150Hz范围内具有较好的隔、吸声性能。现场测试结果表明：我国高速铁路大量采用的金属声屏障插入损失值频率高于500Hz时应用效果较好，各频率的插入损失值可达5dB以上，该测试结果与实验室声屏障材料的声学性能测试结果具有一定的相关性，即目前所采用的金属声屏障材料对高频声降噪效果应用较好。This paper reviewed the research and the development course of railway sound barriers in China. By classifying and testing the existed railway sound barrier materials, gaining the result that the weighted sound reduction index （Rw） of metal sound barriers is between 19 to 44 dB, of which is between 26 to 45 dB nonmetal sound barriers. The noise reduction coefficient （NRC） of metal sound barriers is between 0. 3 to 1.1 , while the NRC of nonmetal sound barriers is between 0.7 to 0.9. The materials had good sound isolation ＆ absorption performance corresponding to the sound which frequency is between 315 to 3 150 Hz. The field test result showed that, the metal sound barriers being used by high-speed railway in China had good application effect when the insertion loss was higher than 500 Hz, the insertion loss of each frequency could reach to more than 5 dB. There was a certain correlation between this test result and of which the acoustic test of sound barrier materials in lab, which the metal sound barrier material being used is of better effect to the noise reduction of high frequency noise.

关 键 词：铁路 声屏障 材料 声学性能 

分 类 号：TB53[理学—物理]