基于高低雷诺数试验的分离双箱涡振性能对比  

Comparison and Analysis of Vortex Induced Vibration for Twin-Box Bridge Sections Based on Experiments in Different Reynolds Numbers

作　　者：张伟[1] 魏志刚[1] 杨詠昕[1] 葛耀君[1] 

机构地区：[1]同济大学土木工程防灾国家重点试验室,上海200092

出　　处：《同济大学学报（自然科学版）》2008年第1期6-11,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金重点资助项目(50538050);国家"八六三"高技术研究发展计划资助项目(2006AA11Z108);国家自然科学基金资助项目(50608059)

摘　　要：为比较分离双箱涡振性能在高低雷诺数试验中的异同,在同济大学TJ-1和TJ-3风洞试验室进行了40个工况的对比试验.结果表明,在低雷诺数试验中涡振出现的阻尼比区间及其相应的振幅都较大,在高雷诺数试验中涡振出现的阻尼比区间和幅值都较小;导流板在零度攻角时无论雷诺数高低都能减小涡振振幅,但在攻角存在时,导流板仅在低雷诺数试验条件下能够增大涡振振幅而在高雷诺数试验条件下则会减小涡振振幅.最后还对试验现象差异的机制进行了分析,并对与大带东桥和昂船洲桥研究结果异同的原因进行了分析.In order to compare the performance of the vortex induced vibrations （VIV） of twin-box bridge sections in different Reynolds numbers, two groups of experiments with 40 cases were carried out in TJ-1 and TJ-3 wind tunnel. The results show that VIV occurs in a more widely range of damping ratios with rather larger amplitudes in the low Reynolds number experiments. While in the high Reynolds number experiments, VIV only occurs in a much closer range of damping ratios with the amplitude being smaller. As for the guide vanes, they do decrease the amplitude of VIV in the attack angle of zero no matter the Reynolds number is high or low. However, when the attack angle exists, they only can decrease the amplitudes in the high Reynolds number experiments while the amplitudes of VIV will be increased a lot in the low Reynolds number experiments. Comparisons are also done with the experiments of the Great Belt East Bridge and the Stonecutters Bridge. The mechanisms of the experiments are detailed hereafter together with the reasons of comparisons＇ divergence and agreement.

关 键 词：桥梁风洞试验 分离双箱 雷诺数 涡激共振 振动控制 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]