Wind tunnel tests on aerodynamic characteristics of train-triple-box girder system

YANG Lingbo; HUA Xugang; WANG Chaoqun; CHEN Zhengqing

doi:10.7638/kqdlxxb-2021.0212

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Wind tunnel tests on aerodynamic characteristics of train-triple-box girder system

更新时间：2026-05-28

- Wind tunnel tests on aerodynamic characteristics of train-triple-box girder system
- Vol. 40, Issue 2, Pages: 105-114(2022)
- 作者机构：
  
  湖南大学风工程与桥梁工程湖南省重点实验室,长沙,410082
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2021.0212
  CLC： U448.27
- Published：2022
- 稿件说明：
移动端阅览
杨凌波, 华旭刚, 王超群, 等. 分离式三箱梁车-桥系统气动特性风洞试验[J]. 空气动力学学报, 2022, 40(2): 105−114.

YANG Lingbo, HUA Xugang, WANG Chaoqun, et al. Wind tunnel tests on aerodynamic characteristics of train-triple-box girder system[J]. 2022, 40(2): 105-114.
杨凌波, 华旭刚, 王超群, 等. 分离式三箱梁车-桥系统气动特性风洞试验[J]. 空气动力学学报, 2022, 40(2): 105−114. DOI： 10.7638/kqdlxxb-2021.0212

YANG Lingbo, HUA Xugang, WANG Chaoqun, et al. Wind tunnel tests on aerodynamic characteristics of train-triple-box girder system[J]. 2022, 40(2): 105-114. DOI： 10.7638/kqdlxxb-2021.0212.

摘要

为研究分离式三箱梁气动力特性和主梁-列车系统的气动干扰效应，基于风洞试验对比分析了直线型腹板及圆形腹板以及附属设施对主梁断面三分力系数的影响，进一步研究了不同腹板形式主梁气动力的雷诺数效应，同时讨论了列车与主梁间的气动干扰效应。结果表明：分离式三箱梁的阻力系数随风攻角的变化趋势与分离式双箱梁十分接近，即先减小后增大，且拐点大约在风攻角为−2°到0°之间。腹板形状对分离式三箱梁的三分力系数影响很小，而风屏障等附属设施和气动措施的影响较大。在试验雷诺数范围内，两种腹板形式的分离式三箱梁施工期裸梁断面均存在明显雷诺数效应，但两者有明显区别：直线型腹板主梁的阻力系数对雷诺数变化较为敏感，升力系数和力矩系数则不敏感；而圆形倒角腹板主梁的阻力系数和力矩系数均对雷诺数的变化较为敏感。列车与分离式三箱梁间存在显著的气动干扰效应，且不同风攻角间存在明显差异。单个列车存在时，列车和主梁之间的相对水平位置对主梁的三分力系数影响不大；双列车会车时，主梁的阻力系数较无列车和单列车时显著减小，且背风侧列车受到的气动力先突降后突增，对行车安全不利。

Abstract

In order to investigate the aerodynamic characteristics of the triple-box girder and the aerodynamic interference between trains and the triple-box girder of a bridge

wind tunnel tests were carried out to discuss the effects of the web shape and appurtenant facilities as well as the Reynolds number on the aerodynamic force coefficients of the triple-box girder. The results indicate that the variation trend of drag coefficient of the triple-box girder with the wind attack angle is very similar to that of the twin-box girder

i.e.

it first decreases and then increases with a turning point in the wind attack angle range of −2°～0°. The web type only has a minor effect on the aerodynamic force coefficients

while appurtenant facilities such as the wind barrier has significant effects. Within the Reynolds number range of the tests

bare girders with two different webs (namely curved type and linear type) both have obvious Reynolds number effects

but a clear difference exists between them: for the girder with a linear-type web

only the drag coefficient is sensitive to the Reynolds number change; while for the girder with a curved-type web

both drag and moment coefficients are sensitive to the Reynolds number variation. The aerodynamic interference effect between the train and the girder is remarkable

and such an effect varies with the wind attack angle. When a single train exists

the relative horizontal position between the train and the girder has little effect on aerodynamic force coefficients of the girder. When two trains meet each other

the drag coefficient of the girder is significantly reduced compared to that without trains or with a single train

and the aerodynamic force of the leeward train first drops and then increases suddenly

which is unfavorable for the traffic safety.

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Keywords

references

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