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|本期目录/Table of Contents|

三维风场下的不同桥梁断面形式的气动特性数值分析

《应用力学学报》[ISSN:1000-4939/CN:61-1112/O3]

期数:
2019年02期
页码:
473-479
栏目:
出版日期:
2018-12-18

文章信息/Info

Title:
Aerodynamic selection research of bridge girder section in three-dimensional wind field
作者:
王旭12袁波12陈红鸟12罗杰12
1 贵州大学 空间结构研究中心 550003 贵阳;2 贵州省结构工程重点实验室 550003 贵阳
Author(s):
Wang Xu12 Yuan Bo12 Cheng Hongniao12 Luo Jie12
1Space Structure Research Center, Guizhou University, 550003, Guiyang, China; 2 Guizhou Provincial Key Laboratory for Structure Engineering, Guizhou University, 550003, Guiyang ,China
关键词:
三分力系数CFD数值模拟桥梁断面气动选型
分类号:
U488.21
DOI:
10.11776/cjam.36.02.A037
文献标识码:
A
摘要:
基于计算流体力学(CFD)方法,计算风对桥梁的静力作用。首先在二维和三维风场环境中,分别计算了同一桥梁断面的三分力系数,将其与风洞试验结果进行了对比。然后在三维风场下,分别以扁平箱梁、分离式双边箱梁和∏型梁三种经典桥梁断面为结构模型,建立-5°~+5°共11个风攻角下的流场模型,以剪切应力输运k-ω模型为湍流模型,提取不同攻角下的三分力系数,绘制了桥梁结构模型周围的风场特征图,包括压力云图、速度和旋涡的分布图,分析不同桥梁断面形式的抗风性能。结果表明,三维的计算结果更加接近试验值,其阻力系数和升力系数与试验值的误差分别为1.36%和0.054%。通过三维数值分析得到的数据可以初步确定抗风性能好的断面类型,能为大跨度桥梁的设计与研究提供重要参数。

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