基于Cadna/A的高层建筑环境噪声垂直分布仿真

以开封市某住宅小区建筑物为例，利用Cadna/A软件建立建筑物三维仿真模型，预测交通噪声在建筑物垂直方向的分布规律，并用实测数据对预测结果进行验证。结果表明Cadna/A软件预测交通噪声的精度均在97 %以上。昼间噪声A声级随着建筑物高度的增加，呈先增加后减小的趋势, 最大噪声高度约22 m。地面粗糙度的程度可有效降低不同高度的噪声的噪声级。本研究可为居民选择最佳居住楼层及城市主管部门噪声防治提供依据。

Simulation of Noise Vertical Distribution of High-rise Buildings Using Cadna/A Software

Noise vertical distributions of high-rise buildings in a residential community in Kaifeng City are predicted using Cadna/A software on the basis of a 3D simulation model. Meanwhile, results of the simulation are checked up by the actually measured noise data. The results show that the accuracy of noise prediction by using Cadna/A software is higher than 97 %. The noise increases at first and then decreases with the vertical distance from the ground increasing, and the maximum noise appears at 22 m height from the ground. The surface roughness can cut down the noise intensity at different altitudes. The results have provided a scientific basis for urban noise control and a help for residents choosing the best residential floors of buildings.