大跨度箱形钢拱肋气弹模型涡振试验研究  

Vortex-induced vibration test of a long-span box-shape steel arch rib

作　　者：许福友[1] 谭岩斌[1] 张哲[1] 潘盛山[1] 

机构地区：[1]大连理工大学土木工程学院,大连116024

出　　处：《振动与冲击》2011年第2期10-14,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50708012);高等学校博士点新教师基金资助项目(20070141073);辽宁省博士启动基金资助项目(20081086)

摘　　要：通过风洞试验研究了大跨度矩形钢拱肋气弹模型在均匀流场和紊流场中3种攻角(-3°、0°、+3°)、多种偏角(0°～90°)条件下的涡振响应。研究结果表明:均匀流场中,发现了稳定的一阶反对称竖弯和对称竖弯涡振,紊流场中未发现明显稳定的涡振;均匀流场中,一阶反对称竖弯涡振振幅很小,风速较低,锁定区也很窄;一阶对称竖弯涡振振幅很大,风速较高,锁定区也很宽;1/4断面涡振振幅大于拱顶断面涡振振幅;可以认为当偏角大于10°时,矩形拱肋不会出现涡振。Through wind tunnel tests in smooth and turbulent flows,the vortex-induced vibration responses of a large-span rectangular steel arch rib aeroelastic model were investigated.Three kinds of attack angles（-3°,0°,＋3°） and multiple yaw angles（0°～90°） cases were incorporated.The results showed that in smooth flows,the stable 1st anti-symmetric vertical bending vortex vibration and the 1st symmetric one can be observed,they are not found in turbulent flows;the 1st anti-symmetric vertical bending vortex vibration amplitude is very small with lower wind speed and narrower lock-in area;on the contrary the 1st symmetric vertical bending vortex vibration amplitude is largeer with higher wind speed and wider lock-in area;the vortex vibration amplitude of the 1/4 section is greater than that of the vaulted section;when the yaw angle is greater than 10°,a vortex vibration does not appear for the rectangular rib.

关 键 词：钢拱肋 气弹模型 涡振 风洞试验 

分 类 号：V215.34[航空宇航科学与技术—航空宇航推进理论与工程]