信号控制对交通噪声的影响分析

用实验方法测定三种不同车型单辆车在参考距离处的噪声排放量及加减速噪声修正值。然后结合微观交通仿真、车辆噪声排放量和传播衰减模型分别对信号控制下的间断流交通噪声和无控制的连续流交通噪声进行动态模拟。最后对两种不同交通流状况下的等效声级、噪声标准差、交通噪声指数和噪声的频数分布进行对比分析,得到两种不同交通流状况下交通噪声的若干重要差别。

Analysis of Effects of Signal Control on Traffic Noise

The single vehicle noise emission levels and acceleration adjustments for three types of vehicles at a reference distance are determined by measurement. Then by combining microscopic traffic flow simulation, vehicle noise emission levels and the noise propagation model, the dynamic traffic noise under the continuum traffic flow in signal control and the interrupted traffic flow without signal control are respectively simulated. Finally, the equivalent sound levels, standard deviations, traffic noise indexes and frequency distributions under the two different traffic flow conditions are compared and analyzed, and several important difference in traffic noise under the two different traffic flow conditions are obtained.