横风中桥隧过渡段移动列车的气动特性试验研究
Experimental study of aerodynamic characteristics of high-speed train on bridge-tunnel junctions under crosswinds
唐林波 1何旭辉 2严磊 2林泽1
作者信息
- 1. School of Civil Engineering,Central South University,Changsha 410075,China
- 2. School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center for High-speed Railway Construction,Changsha 410075,China;Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structures,Changsha 410075,China
- 折叠
摘要
本文通过缩尺比为1:16.8的复兴号动模型试验研究了横风中移动列车经过桥隧过渡段时的气动特性.该试验在中南大学风洞实验室自主研发的弹射模型实验装置上进行,移动列车表面的气动压力通过装载在车体内的无线测压系统获得,并可通过积分获得列车气动力.实验结果表明,横风中移动列车经过桥隧过渡段时,列车侧向力会发生先负后正或先正后负的剧烈变化,列车迎风面压力标准差大于背风面压力标准差.在迎、背风侧轨道上运行的移动列车经过桥隧过渡段时所受气动力变化规律相似,迎风侧轨道上移动列车在隧道洞口处所受侧向力一般比其在背风侧轨道时的大;其主要原因是相对于背风侧轨道上的列车,迎风侧轨道上的列车迎风面所受负压更小,背风面所受负压更大.
Abstract
This paper introduces a moving train model experimental study concerning aerodynamic characteristics of a Fuxing train with a scale ratio of 1:16.8 passing a bridge-tunnel junction under crosswinds. This experiment was carried out using the moving model experimental device independently developed by the Wind Tunnel Laboratory at Central South University. A wireless pressure measuring device mounted on the vehicle body was used to monitor aerodynamic pressure on train surface and the pressure can be used to calculate the aerodynamic force by integration. The results show when the train passes the bridge-tunnel junction under crosswinds, the side force of the train will dramatically change from negative to positive or from positive to negative and the standard deviation of pressure on train windward surface is larger than that on train leeward surface. The aerodynamic change patterns of trains on the windward and leeward tracks are similar, but the side force of the train running on the windward track is generally more significant than that on the leeward track; the main reason is that compared with the train on leeward track, the negative pressure on windward surface is smaller and that on leeward surface is larger.
关键词
横风/移动列车/桥隧过渡段/风压测量/轨道位置/风洞试验Key words
crosswinds/moving train/tunnel-bridge junction/pressure measurement/track position/wind tunnel test引用本文复制引用
基金项目
National Natural Science Foundation of China(51925808)
National Natural Science Foundation of China(52178516)
Science and Technology Research and Development Program of China Railway Group Limited(2021-Special-04-2)
Tencent Foundation and Xplorer Prize,China()
出版年
2023
NETL
NSTL
维普
万方数据