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

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.

关键词:桥梁风洞试验;分离双箱;雷诺数;涡激共振;振动控制;低雷诺数;试验条件;分离;涡振;性能;Reynolds Numbers;Different;Experiments;Based;Sections;Bridge;Vibration;Induced;Vortex;Analysis;异同的原因;研究;昂船洲;分析;机制

Abstract:

Key words:bridge wind tunnel experiment; twin-box bridge sections; Reynolds number; vortex induced vibration; vibration control