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  

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

作　　者：张建国[1] 张春 ZHANG Jianguo;ZHANG Chun(School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学建筑与土木工程学院,福建厦门361005

出　　处：《振动与冲击》2023年第18期199-205,共7页Journal of Vibration and Shock

基　　金：福建省自然科学基金面上项目(2018J08015)。

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°到90°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特劳哈尔数S t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。Taking the hangers of a large span suspension bridge as a research subject,carbon fiber material was used to replace steel material and the rectangular cross-section was adopted.The 2D numerical simulations of hangers with the cross-section ratios of 1∶1,1∶2 and 1∶3 were conducted.The wind attack angle varied from 0°to 90°.Some corresponding wind vibration characteristic parameters were obtained.The possibility of the vortex-induced vibration and galloping of the hangers was explored,and the corresponding critical wind speed was calculated.At the same time,the relationship between the Strouhal number S t of the rectangular hangers of different section ratios and the wind attack angle was presented.

关 键 词：吊杆 数值模拟 驰振 涡激共振 截面比 

分 类 号：TU317.2[建筑科学—结构工程] TU973.213