纵坡道路噪声分布规律研究*

为了摸清纵坡道路单车噪声排放规律和两侧声场分布状况,借鉴国内外单车噪声排放模型研究方法,对水平路面单车和坡度路面单车噪声源强测试数据进行分析,提出水平路面单车噪声排放模型和坡度路面单车噪声排放修正模型。实测某纵坡道路两侧噪声分布情况验证模型的适用性,并应用模型仿真研究纵坡道路噪声分布规律,得出与道路较近的观测点处,上坡一侧噪声比下坡一侧和水平道路两侧偏高;与道路较远的观测点处,坡度产生的影响可以忽略不计。论文研究成果对道路环境影响评价和噪声地图绘制及其误差分析具有很好的参考作用。

The distribution of noise of longitudinal slope

Referencing to existing research methods of noise emission models, new noise emission model and gradient correction model are proposed based on the analysis of noise source emission data of the level roads and longitudinal roads. Verification is conducted to test the applicability of those models by measuring the noise of both sides of a longitudinal slope. The distribution of noise of longitudinal slope is obtained using simulation tools based on those verified models. It can be drawn that the noise at the ascending side is larger than those at the descending side and both sides of the level road when the evaluating points is near the road. The effects of gradient can be neglected for those points far away from the road. It provides a reference for road environmental impact assessment and noise mapping and its error analysis.