| 准流线型桥梁断面涡激共振的雷诺数效应 |
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| 引用本文： | 崔欣,李加武,陈飞,刘健新. 准流线型桥梁断面涡激共振的雷诺数效应[J]. 长安大学学报(自然科学版), 2011, 0(2): 47-51,62 |
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| 作者姓名： | 崔欣 李加武 陈飞 刘健新 |
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| 作者单位： | 长安大学公路学院;浙江浙西高速公路管理有限公司; |
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| 基金项目： | 国家自然科学基金项目(50578014) |
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| 摘 要： | 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。
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| 关 键 词： | 桥梁工程 雷诺数效应 涡激共振 脉动压力 |
Reynolds number effect on vortex resonance of streamline-like bridge deck section |
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| CUI Xin,LI Jia-wu,CHEN Fei,,LIU Jian-xin. Reynolds number effect on vortex resonance of streamline-like bridge deck section[J]. JOurnal of Chang’an University:Natural Science Edition, 2011, 0(2): 47-51,62 |
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| Authors: | CUI Xin LI Jia-wu CHEN Fei LIU Jian-xin |
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| Affiliation: | CUI Xin1,LI Jia-wu1,CHEN Fei1,2,LIU Jian-xin1 (1.School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China,2.Zhejiang Zhexi Expressway Manage Co ltd,Hangzhou 310014,Zhejiang,China) |
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| Abstract: | In order to study the Reynolds number effect on vortex resonance of streamline-like bridge deck section,Reynolds number was changed by adjusting scale of model,and pressure taps were set on the surface of model.Amplitude and wind pressure time history of two models were recorded.Reynolds number effect on vibration frequency spectrum,moment coefficient time history and fluctuation pressure frequency spectrum were studied.Intrinsic reasons of Reynolds number effect on vortex was revealed.The investigation ind... |
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| Keywords: | bridge engineering Reynolds number effect vortex resonance fluctuating pressure |
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