三主桁断面车-桥气动特性的风洞试验研究

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摘要为研究三主桁断面车-桥组合系统的气动特性，以某大跨度斜拉桥为工程背景，采用节段模型风洞试验，通过开发的车-桥气动力同步测试装置对车-桥组合状态下各自的气动力进行了测试，研究了线路位置、双车交会间距、风攻角等因素对车-桥系统气动特性的影响，分析了紊流来流对车-桥气动特性的影响，讨论了列车气动导纳的特征。结果表明：由于绕流剪切层的影响，靠近迎风侧车辆阻力系数大于其他线，线路2上列车的升力系数最大；双车交会时，背风侧车辆的阻力系数和升力系数随交会间距的增大而增大；受桁架自身绕流的影响，紊流来流对列车气动力功率谱影响较小；阻力和升力的气动导纳随折减频率呈现先增后减的趋势。

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	韩旭1
	向活跃1
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	罗扣3
	李永乐1
	2

关键词 ：三主桁断面, 车-桥系统, 气动特性, 同步测试装置, 气动导纳, 风洞试验

Abstract：To investigate the aerodynamic characteristics of the vehicle-bridge coupled system for a three-main truss section bridge, a large-span cable-stayed bridge with three-main trusses section was taken as the research object, and a device for measuring aerodynamic force of vehicle-bridge synchronously was used to measure the aerodynamic forces on vehicle and bridge through a section model wind tunnel test. Many factors, such as track location, two trains crossing, wind attack angle, etc., that affect the aerodynamic characteristics of the vehicle-bridge system were studied. The influence of turbulent wind on the aerodynamic characteristics was discussed. The characteristics of aerodynamic admittance of train are discussed. The results show that due to the influence of the shear layers of flow around, the drag coefficient of vehicle on the windward side is greater than that of other lines, and the lift coefficient of train on Line 2 is the largest. When two trains pass each other, The drag and lift coefficient of the vehicle on the leeward side increase with the increase of the intersection distance. Due to the influence of the flow around the truss, the turbulent wind has little influence on the power spectrum of aerodynamic force of the train. The aerodynamic admittance of drag and lift forces increases first and then decreases with the increase of the reduction frequency.

Key words： three-main trusses section vehicle-bridge system aerodynamic characteristics synchronous test device aerodynamic admittance wind tunnel test

收稿日期: 2020-12-16 出版日期: 2022-04-15

引用本文:

韩旭1，向活跃1,2，罗扣3，李永乐1,2. 三主桁断面车-桥气动特性的风洞试验研究[J]. 振动与冲击, 2022, 41(7): 268-275.
HAN Xu1, XIANG Huoyue1,2, LUO Kou3, LI Yongle1,2. Wind tunnel tests of aerodynamic characteristics of vehicle-bridge with 3-main truss section coupled system. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(7): 268-275.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I7/268

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