基于Cadna/A软件的城市交通十字路口噪声预测研究

通过分析城市十字路口噪声源的特点,采用Cadna/A噪声模拟软件建立十字路口交通预测模型,对十字路口周边声场分布情况进行了模拟研究,研究发现在选定的十字路口,交通噪声对周边环境影响较大,面向道路一侧昼间最大噪声值为72.9dB(A),夜间最大噪声值为64.5dB(A),背向道路一侧昼间最大噪声值为65.4dB(A),夜间最大噪声值为57.2 dB(A),本次研究的成果对于交通规划、噪声评价都具有十分重要的现实意义。

Studies of Urban Traffic Intersection Noise Prediction Based on Canda/A Software Program

Through analyzing the characteristics of the urban intersection noise sources,this study developed a model to predict intersection traffic noise based on Cadna/A noise simulation software program and simulated the noise field distribution at the intersection.The result showed that the traffic noise had significant impact on the environment around the selected intersection.The maximum day-time noise level of the side facing street is 72.9dB（A） while the maximum night-time noise level is 64.5dB （A）.The maximum day-time noise level of the side back to the street is 65.4 dB（A） while the maximum night-time noise level is 57.2 dB（A）.The findings of this study have great practical significance for both transportation planning and noise assessment.