考虑车流分布特性的环形交叉口交通噪声预测模型

A Model for Predicting Traffic Noise at Roundabout with Consideration of Traffic-flow Distribution Characteristics

考虑到环形交叉口环道上车流分布不均匀的特点,运用数学建模的方法,建立了考虑环道车流分布特性的交通噪声预测模型。同时,采用Paramics微观交通仿真和实地调查两种手段,对环形交叉口进行了大量的交通噪声模拟计算。仿真和实地调查的结果均表明:所建立的交通噪声预测模型具有较高的预测精度,与现有预测模型相比提高了在环道车流分布不均匀时的交通噪声拟合效果,更符合实际情况。

The roundabout of the motorway is characterized by a quite different distribution of entering vehicles, which is connected with traffic noise. On the basis of analysis of traffic flow distribution, a new model was developed to predict the traffic noise in the roundabout by mathematic modeling. With respect to traffic noise in this occasion, field survey was carried out and large amount of simulation and calculation were made using the Paramics microscopic traffic simulation technology. Validation of the new predict model indicated that it had a higher predicting precision than the existing prediction model, showing that the model was in conformity to the specific situation of roundabout.