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准流线型桥梁断面涡激共振的雷诺数效应

, PP. 47-51

Keywords: 桥梁工程,雷诺数效应,涡激共振,脉动压力

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Abstract:

为了研究准流线型桥梁断面涡激共振的雷诺数效应,通过改变模型尺度实现雷诺数的改变,并在模型表面布置测压点,进行风洞试验。测量了大、小2种模型风速与振幅的关系及各测点的风压时程,分析了振动频谱、扭矩系数时程及各测点脉动压力频谱随雷诺数的变化规律,揭示了扭转涡激振动的雷诺数效应。研究结果表明,脉动压力频谱的雷诺数效应引起了扭矩系数时程的雷诺数效应,从而引发振动频谱的雷诺数效应,最终导致了流线型桥梁断面扭转涡激振动的雷诺数效应。

References

[1]  陈政清,桥梁风工程[M].北京:人民交通出版社,2005.
[2]  张 伟,魏志刚,杨咏昕,等.基于高低雷诺数试验的分离双箱涡振性能对比[J].同济大学学报:自然科学版,2008,36(1):6-11. ZHANG Wei,WEI Zhi-gang,YANG Yong-xin,et al.Comparison and analysis of vortex induced vibration for twin-box bridge sections based on experiments in different Reynolds numbers[J].Journal of Tongji University:Natural Science,2008,36(1):6-11.
[3]  Larsen A,Schewe G.Reynolds number effects in the flow around a bluff bridge cross section[J].Journal of Wind Engineering and Industrial Aerodynamic,1998,74/76:829-838.
[4]  Schewe G.On the force fluctuations acting on a circular cylinder in cross flow from subcritical up to transcritical Reynolds numbers[J].Journal of Fluid Mechanic,1983,133:265-285.
[5]  李加武,崔 欣,张宏杰,等.粗糙度对雷诺数效应的影响[J].长安大学学报:自然科学版,2009,29(2):56-59. LI Jia-wu,CUI Xin,ZHANG Hong-jie,et al.Influence of surface roughness on Reynolds number effects[J].Journal of Chang'an University:Natural Science Edition,2009,29(2):56-59.
[6]  李加武,林志兴,金 挺.压力积分法在桥梁断面雷诺数效应研究中的应用[J].振动工程学报,2006,19(4):505-508. LI Jia-wu,LIN Zhi-xing,JIN Ting.Application of pressures integration in effeets of bridge decks[J].Journal of Vibration Engineering,2006,19(4):505-508.
[7]  徐福友,林志兴,李永宁,等.气动措施抑制桥梁涡振机理研究[J].振动与冲击,2010,29(1):73-76. XU Fu-you,LIN Zhi-xing,LI Yong-ning,et al.Vortex resonance depression mechanism of a bridge deck with aerodynamic measures[J].Journal of Vibration and Shock,2010,29(1):73-76.
[8]  李国豪.桥梁结构稳定与振动[M].修订版.北京:中国铁道出版社,1996.
[9]  埃米尔?希缪,罗伯特?H?斯坎伦.风对结构的作用:风工程导论[M].刘尚培,项海帆,谢霁明,译.上海:同济大学出版社,1991.
[10]  李加武,张宏杰,韩万水.斜拉桥风致响应的雷诺数效应[J].中国公路学报,2009,22(2):42-47. LI Jia-wu,ZHANG Hong-jie,HAN Wan-shui.Wind-induced response of cable-stayed bridge with consideration of Reynolds number effect[J].China Journal of Highway and Transport,2009,22(2):42-47.

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