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Numerical investigation on the crosswind effects on a train running on a bridge
Engineering Applications of Computational Fluid Mechanics ( IF 6.1 ) Pub Date : 2020-11-17 , DOI: 10.1080/19942060.2020.1832920
Simin Zou 1, 2, 3 , Xuhui He 1, 2, 3 , Hanfeng Wang 1, 2, 3
Affiliation  

With the increase of the running speed of the high-speed train (HST), aerodynamic interference between the HST and surrounding structures becomes more and more important. Traditional wind tunnel experiments using the stationary model can not fully reveal the pulsing behavior of the aerodynamic forces on both the HST and surrounding structures. This paper numerically investigates the aerodynamic characteristics of an HST running on a bridge in cross-wind. The simulation results reveal that when there is no wind barrier, the stationary model case with the yaw angle identical to the moving model case can roughly reproduce the main flow structures around the train. However, once the train runs downstream a wind barrier, the stationary model cannot reveal its aerodynamic characteristics regardless of the yaw angle adopted. The moving model scenario successfully captures the pulsing behavior of the forces on both the train and wind barrier, which is concealed in the cases with a stationary model. The present results indicate that only the moving model method can fully reveal the aerodynamic characteristics and interactions between the train and surrounding structures, especially in evaluating their dynamic response.



中文翻译:

横风对桥上列车影响的数值研究

随着高速列车(HST)行驶速度的提高,HST与周围结构之间的空气动力干扰变得越来越重要。使用固定模型的传统风洞实验无法完全揭示HST和周围结构上的空气动力的脉动行为。本文数值研究了横风作用下在桥梁上运行的HST的空气动力学特性。仿真结果表明,在没有挡风板的情况下,偏航角与运动模型相同的静止模型可以大致再现火车周围的主要流动结构。但是,一旦火车在障碍物的下游运行,无论采用哪种偏航角,固定模型都无法显示其空气动力学特性。运动模型场景成功地捕获了火车和风障上的力的脉动行为,这在固定模型的情况下是隐藏的。目前的结果表明,只有运动模型方法才能充分揭示列车和周围结构之间的空气动力学特性和相互作用,尤其是在评估它们的动力响应时。

更新日期:2020-11-17
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