城市轨道列车噪声辐射特性的试验研究  

Experimental investigation on noise radiation characteristics of an urban transit train at moderate and low speeds

作　　者：张海滨[1] 蒋伟康[1] 万泉[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《振动与冲击》2010年第11期83-86,共4页Journal of Vibration and Shock

摘　　要：城市轨道交通噪声是环境污染的重要组成部分,会严重影响沿线居民的工作和生活。掌握列车辐射噪声的特性将有助于轨道交通管理部门采取合理的治理措施,既经济又高效地降低噪声产生的影响。采用阵列测量方式的试验在上海某高架城市轨道交通线上进行,分析了列车噪声级在距离轨面不同高度的空间分布及其变化趋势,研究了各1/3倍频程谱对噪声的贡献量,归纳了列车辐射等效声功率级与列车速度的关系。该研究可以为建立城市列车噪声辐射模型提供参考和帮助。The urban transit train noise is an important part of environment pollution,which affects people's work and lives seriously around the rail.Understanding the train noise radiation characteristics will help to take effective and economical measurements to mitigate the noise disturbance.One experiment was done on some urban viaduct to measure the train noise with a linear microphone array.After dealing with the recorded signals,the follows were analyzed:the variation of the sound power level (SPL) of the train noise versus the height away from the wheel-rail plane,the contribution of each 1/3 octave spectrum to the noise radiation,and the variation of the SPL of the train noise versus the train speed.This study offered a reference for building a model to predict the urban railway noise.

关 键 词：城市轨道列车 轨道噪声模型 噪声辐射 

分 类 号：TB533[理学—物理] TB525[理学—声学]