用计算机模拟方法研究临街建筑对交通噪声的衰减

用计算机模拟方法分析了临街建筑对交通噪声的衰减作用.模拟结果表明,建筑环境参数的改变对交通噪声污染程度有明显影响.合理改变建筑环境参数,可显著提高降噪效果.

Studyon Attenuation of Traffic Noise of Roadside Buildings with Computer Simulation

A computer simulation model for analysis of attenuation of traffic noise of roadside buildings is given. The random traffic flow is supposed on model of Poisson distribution. The various kinds of sound-power-lev- els of vehicles are considered. By using pseudo-random number the same random traffic flow can be produced repeatedly for studying attenuation of traffic noise of different buildings. Direct and reflected sound rays of different orders are considered by geometrical acoustics. The result shows that change of the data of buildings can influence the noise levels obviously, and therefore selecting the data of buildings rationally will reduce the noise remarkably.