作　　者： ; ; ; ;

机构地区： 中山大学

出　　处： 《公路交通科技》 2011年第1期138-142,148,共6页

摘　　要： 应用几何声学理论分析了声波在建筑群间传播过程中的直射、反射和绕射3种传播路径,并以此建立了街道峡谷型十字道路交叉口交通噪声动态计算模型。以实测的交通量、车型比例等参数作为输入,结合该计算模型和微观交通仿真对街道峡谷型十字道路交叉口交通噪声进行了动态模拟,并用实测的交通噪声数据与模拟结果进行了比较。结果表明：各出口车道附近的噪声比进口车道附近高1~2 dB;考虑建筑物影响的计算模型预测结果比不考虑建筑物时高2 dB左右,前者更接近于实测值。该方法不仅可用于预测等效声级,还可对噪声的频数分布进行预测,具有较强的实用性。 A traffic noise calculation model about street canyon road intersection was built by applying geometrical acoustics theory. In this model, three kinds of sound transmission route among buildings, including perpendicular incidence, reflection and diffraction, were considered. Taken measured data of traffic volume, proportion of vehicle types, etc. as inputs, and combined this model with microscopic traffic simulation, the traffic noise at a street canyon road intersection was simulated. The comparison between simulated data and the measured data shows that （ 1 ） the noise levels near each leave links are 1 - 2 dB higher than those near the corresponding approach links; （2） the prediction results made by the model which considering the impact of buildings is about 2 dB higher than the results when neglecting impact of buildings, and the former is more accurate. This method, which ean be applied to predict not only equivalent sound level but also the frequency distribution of traffic noise, has a strong practicality.

关 键 词： 环境工程 交通噪声模型 动态模拟 交叉口 街道峡谷

领　　域： [交通运输工程] [交通运输工程]