【摘要】 为了研究风嘴对流线形钢箱梁涡振性能的影响，以顺德斜拉桥为工程背景，通过节段模型测振风洞试验研究流线形钢箱梁涡振性能，研究发现：原设计断面在成桥状态出现超过规范限值的竖弯涡振和扭转涡振；为提高风洞模型试验效率，首先采用CFD的方法分析了62°、50°和40°风嘴对断面流场特性的影响，结果表明小角度风嘴可以进一步强化断面流线形、降低迎风侧的负压力并改变断面漩涡的规模和位置。随后通过主梁节段模型风洞试验验证了40°风嘴的气动优化措施能较好地消减涡振，该研究可为流线形钢箱梁涡振性能研究提供参考。更多还原

【Abstract】 In order to study wind fairing effect on the vortex-induced vibration(VIV) of streamline steel box deck, taking Shunde cable-stayed bridge of unequal pylons as engineering background, the VIV performance of the streamline steel box girder was studied by the method of segmental model wind tunnel test. It was found that the vertical bending vortex vibration and torsional vortex vibration of the original design section exceeded the limit during the service period. In order to improve the efficiency of wind tunnel model tests, firstly, the CFD method is used to analyze the influence of 62°, 50°, 40° wind fairing on the flow field characteristics of the section, and the smaller wind fairing makes the section streamline more obvious, reduces the negative pressure at the windward, and changes the scale and position of the vortex on the bridge deck. Then, the wind tunnel test results verify that the aerodynamic optimization measure of 40° can reduce the amplitude of VIV better. This study can provide reference for the research of VIV performance of streamline steel box girder.更多还原