高速铁路顶端开放式声障内部气动荷载数值模拟研究  

Numerical simulation of aerodynamic loads inside an open noise barrier at the top of a high-speed railway

作　　者：陈云辉 吕海宇 伍磊 涂佳黄[1] CHEN Yunhui;LYU Haiyu;WU Lei;TU Jiahuang(College of Civil Engineering,Xiangtan University,Xiangtan 411105,China;Yangtze River Pharmaceutical Group Co.,Ltd.,Taizhou 225321,China)

机构地区：[1]湘潭大学土木工程学院,湖南湘潭411105 [2]扬子江药业集团有限公司,江苏泰州225321

出　　处：《湘潭大学学报(自然科学版)》2025年第1期24-35,73,共13页Journal of Xiangtan University(Natural Science Edition)

基　　金：湖南省自然科学基金项目(2021JJ50027);湖南省教育厅科学研究项目(21A0103)。

摘　　要：对高速列车通过顶端开放形式的封闭声障产生的气动荷载问题进行数值模拟计算研究.首先将计算结果与文献结果进行对比,验证了求解方案的准确性和实用性,然后分析顶端开放宽度与列车运行速度对流场的压力、风速时空分布的影响.计算结果表明:顶端开放式声障的内部气动力特性与直立式声障相同,增大开放的宽度有利于控制声障内部测点的风速波动,也能够降低车头/车尾通过带来的湍流效应.另一方面,分析不同宽度和车速声障压力最值的变化,得出测点的压力最值与车速成正比,且与顶端开放宽度呈幂函数的关系.最后,不同顶端开放宽度工况下的风场会发生较大变化,顶端未开放工况下的最大总风速会大于开放工况.该研究结果可为开放式声障气动效应的相关研究以及结构设计提供参考.The aerodynamic load caused by high-speed train passing through closed noise barrier with open top is numerically simulated.First,the calculation results are compared with the results in the literature to verify the accuracy and practicality of the solution scheme.Then,the influence of the top opening width and train speed on the pressure and wind speed distribution in the flow field is analyzed.The calculation results show that the internal aerodynamic characteristics of the top open noise barrier are the same as those of the vertical noise barrier.Increasing the width of the opening is conducive to controlling the wind speed fluctuation at the measuring points inside the noise barrier,and can also reduce the turbulence effect caused by the passing of the vehicle head/tail.On the other hand,analyze the change of the maximum pressure value of the sound barrier at different widths and vehicle speed,and get the relationship that the maximum pressure value of the measuring point is proportional to the vehicle speed and has a power function with the top open width.Finally,the wind field under different top opening width conditions will change greatly,and the maximum total wind speed under the top closed condition will be greater than that under the open condition.The research results can provide a reference for the future research of aerodynamic effects and structural design of open acoustic barrier.

关 键 词：高速列车 顶端开放式声障 气动荷载 重叠网格 计算流体动力学 

分 类 号：TU352.2[建筑科学—结构工程]