横风下流线箱型桥-轨道交通车辆气动干扰风洞实验研究

发布时间：2018-03-21 15:12

本文选题：横风　切入点：流线箱型桥　出处：《振动与冲击》2017年05期 　论文类型：期刊论文

【摘要】：轨道交通车辆与桥梁间存在显著的气动干扰,但现有研究大多以流线型高铁车辆和钝体外形的简支梁桥为研究对象,且往往重点关注桥梁对车辆气动力大小的影响。以某流线箱型轨道专用桥和钝体外形的轨道交通车辆为背景,首先通过刚性节段模型测力试验,利用开发的车-桥系统气动力同步分离装置对不同风攻角、车桥组合方式下车辆和桥梁各自的气动力进行测试,分析横风下车桥间气动干扰对车辆、主梁和车桥系统所受总体气动力的影响规律;然后结合烟线法获得的车桥系统绕流场显示结果,揭示车桥间气动干扰机理。研究成果可为以后典型车桥组合工况下车、桥气动力经验公式的提出奠定基础,以及深入认识车桥间气动干扰机理提供参考。
[Abstract]:There is significant aerodynamic interference between rail transit vehicles and bridges, but most of the existing researches focus on streamlined high-speed railway vehicles and simply supported beam bridges with blunt body shape. And the influence of bridge on the aerodynamic force of vehicle is often focused on. Taking the special bridge of a streamline box track and the railway vehicle with blunt body shape as the background, the force measurement test of rigid segment model is carried out at first. The aerodynamic forces of vehicles and bridges under different wind attack angles and vehicle-bridge combinations are tested by using the developed vehicle-bridge system aerodynamic synchronous separation device, and the aerodynamic interference between the cross-wind and the bridge is analyzed. The main girder and the vehicle-bridge system are affected by the overall aerodynamic force, and then combined with the results obtained by the smoke line method to show the flow field around the vehicle-bridge system, the mechanism of aerodynamic interference between the vehicle and the bridge is revealed. The research results can be used for the later typical vehicle-bridge combination conditions to get off. The empirical formula of bridge aerodynamic force is put forward and the mechanism of aerodynamic interference between vehicle and bridge is deeply understood.
【作者单位】：中南大学土木工程学院;高速铁路建造技术国家工程实验室;中国建筑第五工程局有限公司;
【基金】：国家自然科学基金(51322808;51508580;U1534206) 湖南省自然科学基金(2016JJ3149) 中国博士后科学基金(2014M562133) 中国铁路总公司科技研究开发计划(2015G002-C) 中南大学“创新驱动计划”(2015CX006) 长沙理工大学桥梁工程安全控制省部共建教育部重点实验室开放基金(14KB02)
【分类号】：U441.3

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