刘小兵, 张海东, 王彦彪. 扁平箱梁涡激力的展向相关特性研究[J]. 工程力学, 2016, 33(增刊): 239-243,250. DOI: 10.6052/j.issn.1000-4750.2015.05.S049
引用本文: 刘小兵, 张海东, 王彦彪. 扁平箱梁涡激力的展向相关特性研究[J]. 工程力学, 2016, 33(增刊): 239-243,250. DOI: 10.6052/j.issn.1000-4750.2015.05.S049
LIU Xiao-bing, ZHANG Hai-dong, WANG Yan-biao. STUDY ON SPANWISE CORRELATION OF VORTEX-INDUCED FORCES ON A FLAT BOX GIRDER[J]. Engineering Mechanics, 2016, 33(增刊): 239-243,250. DOI: 10.6052/j.issn.1000-4750.2015.05.S049
Citation: LIU Xiao-bing, ZHANG Hai-dong, WANG Yan-biao. STUDY ON SPANWISE CORRELATION OF VORTEX-INDUCED FORCES ON A FLAT BOX GIRDER[J]. Engineering Mechanics, 2016, 33(增刊): 239-243,250. DOI: 10.6052/j.issn.1000-4750.2015.05.S049

扁平箱梁涡激力的展向相关特性研究

STUDY ON SPANWISE CORRELATION OF VORTEX-INDUCED FORCES ON A FLAT BOX GIRDER

  • 摘要: 针对扁平箱形断面梁,在均匀流场中进行了涡激振动节段模型风洞试验,研究了扁平箱梁涡激力的展向相关性。结果显示:在涡振锁定区的振幅下降阶段,升力的展向相关性随着振幅的减小而减弱;在涡振锁定区的振幅上升阶段,升力的展向相关性随着振幅的增大先增强后减弱,升力展向相关系数的最大值出现在振幅上升阶段的某个风速,而不是最大振幅对应的风速;均匀流场条件下,在涡振锁定区内,扁平箱梁涡激力的展向相关性不仅与振幅有关,也与来流风速值有关。

     

    Abstract: A sectional model wind tunnel test of a flat box girder in smooth flow was performed and the spanwise correlation of vortex-induced forces was investigated. The study results show that spanwise correlation of lift force becomes weakened with the decrease of vibration amplitudes at vibration amplitude-decreasing stage in lock-in range. At vibration amplitude-increasing stage in lock-in range, with the increase of vibration amplitudes, spanwise correlation of lift force becomes strengthened first and then weakened. The maximum value of spanwise correlation coefficient appears in a wind speed in vibration amplitude-increasing stage, rather than the wind speed corresponding to maximum vibration amplitude; In lock-in range, spanwise correlation of vortex-induced forces of flat box girder is dependent on both vibration amplitude and wind speed in smooth flow.

     

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