摘要
采用有限元分析方法,以国内某大跨度悬索加劲钢桁梁桥为研究背景,对主塔钢压杆涡振性能进行研究。采用基于RANS方法的k-wSST湍流模型,开展了塔柱压杆钝体断面的气动稳定性CFD数值模拟计算,得到了断面的自激气动力系数以及周围流场信息。计算结果发现压杆断面在尾流区存在明显漩涡脱落,有可能引发涡激振动现象,对构件的耐久性造成损伤。
In this paper, the eddy vibration performance of steel compression bar of main tower is studied by using finite element analysis method and taking a domestic long-span suspension stiffened steel truss bridge as the research background. Using k-wSST turbulence model based on RANS method, the CFD numerical simulation of the aerodynamic stability of the blunt body section of the column strut is carried out, and the self-excited aerodynamic coefficients of the section and the flow field information around the section are obtained. The results show that there are obvious vortex shedding in the wake region of the compressed bar section, which may cause vortex-induced vibration and damage the durability of the member.
出处
《建筑技术开发》
2019年第9期138-139,共2页
Building Technology Development
关键词
悬索桥
压杆
钝体
涡激振动
suspension bridge
sressure bar
sluff body
vortex-induced vibration
