磁悬浮列车行驶噪声的测试与分析

在世界上第一条商业化磁悬浮轨道交通运营线上，对磁悬浮列车行驶噪声进行较为深入的现场测试，并进行较为全面的分析研究．典型的测试结果表明，在距轨道中心线35m处，最大计权声级为96dB(A)与101dB(C)．主要噪声来源为空气动力性噪声．它可分为3个部分：绕流声、附面层噪声与尾流噪声．噪声具有脉冲性与间歇性，对轨道两侧环境的噪声污染具有不可忽视的影响．

Measurement and Analysis of Noise from Running Maglev Systems

In this paper quite thorough measurement in situ, as well as overall analysis of noise beside the first commercialized magnetically levitated systems (maglev) in the world is presented. The typical result shows the max sound level is 96 dB(A) or 101 dB(C) at the point of 35m from the center line of the track. The main source of noise is aerodynamic noise which may be divided into three major parts: noise from vortex flow around the train, noise from boundary layer and noise from wake. The character of the noise is pulse and intermittence. It cannot be ignored as the noise pollution on both sides of track.