考虑风屏障效应的车桥系统三分力系数风洞试验研究

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摘要采用节段模型风洞试验，测试了车辆通过平地路基、跨度32m简支箱梁、跨度16m简支T梁时的三分力系数，综合分析了不同行车工况、不同线路构造形式及设置单、双侧风屏障后车辆和桥梁的气动特性。结果表明：较于箱梁和T梁，车辆在路基上行驶时更安全；安装单侧风屏障和双侧风屏障时车辆和桥梁的气动力系数都很接近，背风侧风屏障并不能有效改善车辆的气动性能；双车存在时背风侧车对迎风侧车的气动干扰较小，而迎风侧车的存在却使背风侧车的气动力系数减小，侧力系数甚至出现负值；风屏障的存在改变了车桥系统周围的流场；迎风侧车对右轨线的侧倾力矩系数总是大于对左轨线的侧倾力矩系数。

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	作者相关文章
	王玉晶1
	郭薇薇1
	2
	夏禾1
	2
	张楠1
	2
	张田3

关键词 ：车桥系统, 风屏障, 气动特性, 行车安全性, 风洞试验

Abstract：With wind tunnel test of a sectional model, the tri-component coefficients of a train when it runs on the flat ground, a 32m span simply-supported box girder and a 16m span simply-supported T-shaped beam were tested, respectively.Aerodynamic characteristics of the train and the bridge were comprehensively analyzed under different running cases, different railway forms, and different wind barrier conditions (installed on single side or both sides).The results show that it is safer for the train to run on the flat ground than on the box girder and the T-shaped beam.Aerodynamic coefficients of the train and bridge were very close when the wind barriers were installed on the windward side and both sides, demonstrating that the existence of leeward barrier cannot improve the aerodynamic performance efficiently.When there are simultaneously two trains, the leeward train has little aerodynamic interference on the windward one, while the windward train decreases the aerodynamic coefficients of the leeward train even to make the side force coefficient a negative value.The existence of wind barrier obviously changes the wind flow around the train-bridge system.Rolling moment coefficient to the right track is always greater than that to the left track.

Key words： train-bridge system wind barrier aerodynamic characteristics running safety of train wind tunnel test

收稿日期: 2017-12-04 出版日期: 2018-10-15

引用本文:

王玉晶1，郭薇薇1，2，夏禾1，2，张楠1，2，张田3. 考虑风屏障效应的车桥系统三分力系数风洞试验研究[J]. 振动与冲击, 2018, 37(20): 88-94.
WANG Yujing1，GUO Weiwei1，2，XIA He1，2，ZHANG Nan1，2，ZHANG Tian3. Wind tunnel test of tri-component coefficients for a train-bridge system considering wind barrier effect. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(20): 88-94.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I20/88

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