| 单线路堤上挡风墙高度研究 |
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| 引用本文： | 高广军,段丽丽. 单线路堤上挡风墙高度研究[J]. 中南大学学报(自然科学版), 2011, 42(1) |
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| 作者姓名： | 高广军 段丽丽 |
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| 作者单位： | 中南大学,交通运输工程学院,轨道交通安全教育部重点实验室,湖南,长沙,410075 |
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| 基金项目： | 国家支撑计划项目(2006BAC07B03) |
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| 摘 要： | 采用数值模拟计算的方法,对单线路堤上不同高度单、双侧挡风墙对列车气动性能的影响进行研究。研究结果表明:安装挡风墙后,车辆的气动力系数远远小于无挡风墙时的气动力系数,车辆的迎风面受到的压力由大部分正压转变为大部分负压,车辆顶部受到的负压明显减小;挡风墙的不同高度对车辆的气动性能有明显影响,挡风墙高度较低时,横向力系数为正值,随挡风墙高度的增加而减小,达到一定高度后,由正值变为负值,而倾覆力矩系数则正好相反;对于单侧挡风墙,在挡风墙高度为1.85 m时,车体的倾覆力矩系数为0,其合理高度应为1.85 m;对于双侧挡风墙,当挡风墙高度为2.00 m时,倾覆力矩系数为0,因此,挡风墙合理高度为2.00 m。
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| 关 键 词： | 挡风墙 路堤 气动性能 数值模拟 |
Height of wind barrier on embankment of single railway line |
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| GAO Guang-jun,DUAN Li-li. Height of wind barrier on embankment of single railway line[J]. Journal of Central South University:Science and Technology, 2011, 42(1) |
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| Authors: | GAO Guang-jun DUAN Li-li |
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| Affiliation: | GAO Guang-jun,DUAN Li-li (Key Laboratory of Traffic Safety on Track of Ministry of Education,School of Traffic & Transportation Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | The effect of different heights of wind barrier on double-side or single side of embankment to train aerodynamics performance was researched by numerical simulation.The results show that when wind barrier is installed,train aerodynamic coefficients are much less than those without wind barrier and that the pressure on windward surface of train changes from positive to negative,and negative pressure on roof of train decreases obviously.Different heights of wind barrier have great effect on train aerodynamic ... |
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| Keywords: | wind barrier embankment aerodynamic performance numerical simulation |
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