基于CFD数值计算的大跨悬索桥碳纤维矩形截面吊杆风致振动研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (18) : 199-205.

论文

张建国，张春

作者信息 +

Wind-induced vibration of carbon fiber rectangular hangers of large-span suspension bridges based on CFD analysis

ZHANG Jianguo，ZHANG Chun

Author information +

文章历史 +

摘要

以某大跨悬索桥的吊杆为对象，将其替换为碳纤维材料做成的矩形截面吊杆，通过FLUENT软件对截面边长比为1:1、1:2和1:3时的矩形吊杆从0度到90度风攻角进行二维数值模拟，得出了各自对应的风振特性参数，进而对吊杆产生驰振与涡激共振的可能性进行深入研究，推算出相应的临界风速。同时还给出了对于不同截面比的吊杆相应的斯托罗哈数St与风攻角的关系，为悬索桥矩形吊杆的抗风设计提供一定的理论数据。

Abstract

Taking the hangers of a large span suspension bridge as a research subject, carbon fiber material is used to replace steel material and the cross-section is made into rectangle. The 2D numerical simulations of hangers with the cross-section ratios of 1:1, 1:2 and 1:3 is conducted. Wind attack angle differs from 0 degree to 90 degree. Some wind vibration characteristic parameters are obtained. Therefore, the possibility of the vortex-induced vibration and galloping of the hangers are explored, and the corresponding critical wind speed is calculated. At the same time, the relationship between the Strouhal number St of the rectangular hangers of different section ratios and the wind attack angle is also known.

导出引用

张建国，张春. 基于CFD数值计算的大跨悬索桥碳纤维矩形截面吊杆风致振动研究[J]. 振动与冲击, 2023, 42(18): 199-205

ZHANG Jianguo，ZHANG Chun. Wind-induced vibration of carbon fiber rectangular hangers of large-span suspension bridges based on CFD analysis[J]. Journal of Vibration and Shock, 2023, 42(18): 199-205

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