基于微观交通仿真的居住小区道路交通噪声研究

Road traffic noise study for a house community based on microscopic traffic simulation

采用微观交通仿真对居住小区的道路交通噪声进行动态模拟研究。通过微观交通仿真技术进行路网建模及车辆的动态交通仿真,结合车辆噪声排放模型以及噪声传播模型,考虑噪声在建筑物间的反射和衍射,实现了对居住小区在路网用户均衡和非均衡条件下的交通噪声动态模拟,分析了新增道路穿越小区对小区噪声的影响,模拟了不同建筑物布局下居住小区交通噪声的声场分布。通过道路交通噪声的动态模拟不仅得到小区噪声的等效连续声级,还掌握了其波动起伏特性。最后,进行了实地交通与噪声监测,实测与模拟结果对比表明该方法精确可行。

Microscopic traffic simulation was used to simulate the dynamic road traffic noise for a house community. Route network was modeled and vehicle dynamic traffic was simulated with the microscopic traffic simulation technology. Combining the vehicle noise emission model with the noise propagation model considering reflections and diffractions among buildings, the dynamic traffic noise simulation for a house community under networks of users balance and users unbalance conditions were realized. The influence of a new road passing through the house community and different building layouts on the traffic noise field distribution was analyzed. The outputs were not only the spatial distribution of the traffic noise, hut also the fluctuation characters of the road traffic noise. At last, the measurement results of a field survey agreed well with the simulated ones.