大跨悬索桥扁平箱梁气动力展向相关性研究

CORRELATIONS OF AERODYNAMIC SPANWISE OF FLAT BOX GIRDER OF LONG-SPAN SUSPENSION BRIDGE

为了研究扁平箱梁气动力展向相关性,文中通过节段模型风洞试验,分析了风攻角变化时,模型的气动三力展向相关性。结果表明展向间距增大时,气动力的展向相关性减小,同一展向间距下,升力的相关性最强。模型上表面测点压力与升力在中游时相关性最强,与扭矩负攻角随着攻角增大先增后减,下游相反;正攻角时为先增后减。

This paper study correlations of the three forces of aerodynamic spanwise in flat box girder as the angle of attack changed by the wind tunnel testing.The results show that the spanwise correlation of aerodynamic forces de⁃creases with the increase of spanwise spacing,and the correlation of lift force is the largest with the same spanwise spacing.The correlation between the pressure and the lift force on the upper surface of the model is largest in the middle reaches,and the negative angle of attack increases first and then decreases with the increase of angle of at⁃tack,but it is with opposite trends in the lower reaches,in which angle of attack increases first and then decreases.