Abstract:

Noise vertical distributions on high-rise buildings in a residential community in Kaifeng City were predicted using Cadna/A software on the basis of 3D simulation modes of these buildings. In the same time, the predicted noises with the software were checked up by the noise data actually measured. The results show that the accuracy of Cadna/A software to predict noise is higher than 97%. Noises increase first with the distance increasing from ground and then decrease, and the maximum noise appears about 22 m from ground. The main reason affect where the maximum noise appear and its noise level is according to the degree of surface roughness. The results in this paper should provide a scientific basis for the competent department of the city to control noise and residents choose the best residential floor to live.

摘要：

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。

关键词: 声学, 高层建筑, 噪声垂直分布, 住宅小区, Cadna/A软件