六线双层铁路钢桁桥车桥系统气动特性风洞试验研究

发布时间：2018-01-23 04:42

本文关键词： 车桥系统六线双层铁路桥梁气动特性节段模型风洞试验　出处：《工程力学》2016年04期 　论文类型：期刊论文

【摘要】：为研究多线双层铁路桥梁车辆与桥梁的气动特性,利用三分力分离装置-交叉滑槽系统,对某六线双层大跨铁路斜拉桥进行节段模型风洞试验。测试了不同车桥组合下车辆与桥梁各自的气动力,研究了单列车的位置、双车同层交会、双车上下层共存时车辆和桥梁气动特性的相互影响,并讨论了风攻角对上层车辆气动力的影响。试验结果表明,当车辆位于桥梁断面不同位置时,车辆气动力差异较大;由于上层桥面宽度较大,气流经过桥梁断面前缘分离后,再附着于较靠后的背风侧车辆,导致背风侧车辆的阻力系数更大;双层车辆共存时,当两者同处于迎风侧,气动力有明显的相互影响;风攻角对背风侧车辆的气动力影响显著。
[Abstract]:In order to study the aerodynamic characteristics of vehicles and bridges on multi-line and double-deck railway bridges, a three-point force separation device, the cross chute system, is used. The model wind tunnel test of a six-line double-deck long-span cable-stayed bridge is carried out. The aerodynamic forces of the vehicle and the bridge under different vehicle-bridge combinations are tested, and the position of the single train and the intersection of the two cars with the same layer are studied. The influence of wind attack angle on the aerodynamic force of upper vehicle is discussed when the lower deck of the vehicle coexists. The experimental results show that the vehicle is located in different positions of the bridge section. The difference of vehicle aerodynamic force is great; Because the upper deck width is large, the airflow is separated through the front edge of the bridge section, and then attached to the vehicle on the leeward side, which leads to the larger resistance coefficient of the vehicle on the leeward side. When the double-deck vehicle coexists, the aerodynamic force has obvious interaction when both are in the upwind side. The angle of attack has a significant effect on the aerodynamic force of the vehicle on the leeward side.
【作者单位】：西南交通大学桥梁工程系;中铁二院工程集团有限责任公司;
【基金】：国家自然科学基金重点项目(U1334201) 铁道部科技研究开发计划项目(2011G026-B) 国家重点基础研究发展规划(973)项目(2013CB036206)
【分类号】：U446
【正文快照】： 高速列车运行于大跨度桥梁时,自然风同时作用在列车与桥梁上,车辆处于桥梁的气动绕流之中,桥梁的外形会影响车辆的气动特性,而桥梁断面的气动特性也会随着列车的到达或离去而发生改变。自然风、列车和桥梁三者作为一个相互作用的系统,确定车桥系统中车辆和桥梁的气动参数非常

【相似文献】