Abstract: Setting sound barriers is becoming one of the important measures all over the world for control of railway noises. While the sound barrier’s design is affected by many factors. Equivalent frequency of the sound barrier is one of the key factors, which has direct influence upon the calculation of the sound barrier attenuation. To make the sound barrier’s design reasonable, fast and reliable, the noise frequencies of passenger trains under the condition of different kinds of locomotive tractions at various speeds are studied experimentally. Through the statistical analysis of the measurement data, the sound barrier’s equivalent frequencies of the passenger trains under different conditions are obtained.

Key words: vibration and wave, sound barrier, noise, frequency characteristic, equivalent frequency

摘要： 设置声屏障已成为了世界各国实现铁路噪声控制的主要措施, 然而声屏障的设计受到多种因素的影响，其中声屏障等效频率是关键因素之一，直接影响着声屏障衰减量的计算。为使声屏障设计更加准确、快捷、可靠，本文将根据我国铁路实际运营情况，针对不同机车牵引类型，不同运行时速下客运列车的噪声频率特性进行试验研究，通过对现场实测数据进行统计分析，得出了不同工况下客运列车的声屏障等效频率。

关键词: 振动与波, 声屏障, 噪声, 频率特性, 等效频率