对我国高速铁路典型声屏障的应用效果开展了现场试验研究。结果表明:我国高速铁路声屏障降噪效果随车速增加而降低;声屏障中部和端部降噪效果有较大差异;声屏障降噪效果可将高速动车组噪声源等效为一定高度的线声源来进行预测。为推动我国高速铁路声屏障理论发展和提高实际应用效果,迫切需要进一步开展高速动车组噪声源识别研究。
The field test of the typical noise barrier application effect in China high speed railway was made. The results showed that the noise reduction effect of noise barrier in high speed railway decreases with the speed increasing and there was a big difference of noise reduction effect between the middle and end of noise barrier,and noise reduction effect of noise barrier should be used for prediction by taking the noise source of high speed EMU( Electric Multiple Unit) as a linear noise source with certain height. Further research on noise source identification of high speed EMU is urgently needed for promoting the noise barrier theoretical development of high speed railway in China and improving the practical application effect.