公路桥梁声屏障脉动风压的分析与研究

Analysis and Study of Pulsating Wind Load on Bridge Noise Barrier

大型客车在安装有声屏障或防护屏的桥梁区段内行驶时,气流对声屏障或者防护屏产生较大的脉动风压力.论文基于大客车在声屏障区段内行驶的三维不可压缩湍流CFD数值分析模型,采用动网格技术分析了大客车行驶时作用于声屏障表面的有效脉动风压分布,并对比了车速、距离对声屏障脉动风压数值的影响,给出了大客车有效脉动风压的公式,其分析结果可供桥梁桥面附属设施构件设计中参考,弥补了我国现有公路桥梁设计规范中未给出汽车脉动风压的不足.

When the bus driven within the range of noise barrier or throwing preventing barrier , the air-flow will produces a kind of fluctuating wind pressure on them .This paper established three -dimensional incom-pressible turbulent CFD numerical analysis model of the bus -noise barrier , analyzed the fluctuating pressure distribution on noise barrier surface by using dynamic mesh technology , and made comparative analysis of speed and distance to the effect of fluctuating wind pressure value , and given the effectively fluctuating wind pressure formula.The analysis results can be used for bridge deck affiliated facilities component design , and made up of the existed highway bridge design code that fluctuating wind pressure insufficient was not given .