摘要
高速铁路噪声是“车—线—网—气流”强耦合动力作用的一种表现形式,具有持续时间短、通过声级高、传播距离远等特点。为降低高速铁路噪声对周边环境的影响,国内外高速铁路主要通过声屏障阻隔噪声传播路径。我国常见高速铁路声屏障为2.15~3.15 m高直立式声屏障,结构形式单一,且降噪效果随列车运行速度增加呈下降趋势。在阐述高速铁路车外噪声特性的基础上,回顾我国高速铁路声屏障的实际应用效果,基于直立式声屏障降噪特性分析,探究声屏障截面形式对声屏障降噪效果的影响,以适应高速铁路运输效率提升的发展要求。
The noise generated by high-speed railway has the characteristics of short duration,high sound pressure level and long propagation distance,which stems from strong coupling dynamic of vehicle-track-arc net-airflow.To reduce the negative impact of high-speed railway noise,the general strategy is blocking the transmission path by barrier.The high-speed railway barriers in China,subjected to monotonic structures,mainly are vertical type with height of 2.15~3.15 m.However,the noise attenuation property decreases with the operating speed.On the basis of expounding the characteristics of noise outside high-speed railway cars,this paper reviews the practical application effects of sound barriers on high-speed railway in China.Based on the analysis of the noise reduction characteristics of vertical sound barriers,it explores the influence of the cross section of sound barriers on the noise reduction effects of sound barriers,so as to meet the development requirements of improving the transportation efficiency of high-speed railway.
作者
陈兴
伍向阳
尹皓
陆维姗
CHEN Xing;WU Xiangyang;Yin Hao;LU Weishan(Energy Saving&Environmental Protection&Occupational Safety and Health Research Institute,China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China)
出处
《铁路节能环保与安全卫生》
2020年第3期6-10,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课题(2015G009-A)
中国铁道科学研究院集团有限公司科研开发基金项目(2019YJ131)。
关键词
高速铁路
声屏障
截面形式
降噪效果
High-speed railway
Sound barrier
Cross section
Noise reduction
