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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Simulation and Analysis of Road Traffic Noise among Urban Buildings Using Spatial Subdivision-Based Beam Tracing Method
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Simulation and Analysis of Road Traffic Noise among Urban Buildings Using Spatial Subdivision-Based Beam Tracing Method

机译：基于空间细分的波束跟踪方法对城市建筑物道路交通噪声的仿真分析

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摘要

In order to realize the simulation and evaluation of road traffic noise among urban buildings, a spatial subdivision-based beam-tracing method is proposed in this study. First, the road traffic source is divided into sets of point sources and described with the help of vehicle emission model. Next, for each pair of source and receiver, spatial subdivision-based beam-tracing method is used in noise paths generation. At last, noise distribution can be got by noise calculation of all receivers considering the complex transmission among urban buildings. A measurement experiment with a point source is carried out to validate the accuracy of the method; the 0.8 m height and 2.5-m height average errors are about 0.9 dB and 1.2 dB, respectively. Moreover, traffic noise analysis under different building layouts and heights are presented by case applications and conclusions can be reached: (1) Different patterns result in different noise distributions and patterns designed as self-protective can lead to an obvious noise abatement for rear buildings. Noise differences between the front and rear buildings are about 7–12 dB with different patterns. (2) Noise value might not show a linear variation along with the height as shielding of different layers is various in reality.
机译：为了实现城市建筑物之间道路交通噪声的仿真和评估，提出了一种基于空间细分的波束跟踪方法。首先，将道路交通源划分为多个点源，并借助车辆排放模型进行描述。接下来，对于每一对源和接收器，在噪声路径生成中使用基于空间细分的波束跟踪方法。最后，考虑到城市建筑物之间的复杂传输，可以通过所有接收器的噪声计算来获得噪声分布。进行了点源测量实验，验证了该方法的准确性。高度0.8 m和高度2.5 m的平均误差分别约为0.9 dB和1.2 dB。此外，通过案例应用给出了在不同建筑物布局和高度下的交通噪声分析，并得出以下结论：（1）不同的模式导致不同的噪声分布，而设计成自我保护的模式可以明显减少后方建筑物的噪声。不同样式的前后建筑物之间的噪声差异约为7–12 dB。 （2）噪声值可能不会随高度而显示线性变化，因为实际上不同层的屏蔽层是多种多样的。

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