高速铁路不同形式矮屏障车致气动力研究

Study on Aerodynamic Force Induced by High-speed Train on Different Types of Low Sound Barrier

针对目前高速铁路规划及噪声治理措施现状,提出了4种轨旁矮屏障型式,并借助数值仿真手段,模拟了高速列车通过高架桥上不同形式矮屏障的过程,研究了矮屏障上作用的气动力特性。计算结果表明,不同型式矮屏障所受气动力随时间变化趋势基本相似,呈现出明显的头波和尾波效应;不同型式矮屏障表面气动力的峰峰值大小有差异,3型矮屏障面板风压峰峰值最大,1型矮屏障背板风压峰峰值最大。结合一般混凝土结构强度,矮屏障设置导致的风压增量较小。

In view of the current situation of high-speed railway planning and noise control measures,four types of track-side low sound barriers are proposed in this paper.With the help of numerical simulation,the process of high-speed train passing through different types of low sound barriers on viaduct is simulated,and the aerodynamic characteristics of low sound barriers are studied.The results show that the variation trend of aerodynamic forces on different types of low sound barriers with time is basically similar,showing obvious'head-wave'and'tail-wave'effects;the peak-peak values of aerodynamic forces on different types of low sound barriers are different,the peak-peak values of front aerodynamic forces on type 3 low sound barriers are the largest,and the peak-peak values of back aerodynamic forces on type 1 low sound barriers are the largest.Combined with the strength of general concrete structure,the wind pressure increment caused by the setting of low sound barrier is small.