针对串列双矩形断面涡激振动气动干扰问题,在均匀流场下,分别对不同间距比D/B、不同阻尼比条件下上、下游矩形断面涡激振动气动干扰效应进行了风洞试验研究,并将上、下游矩形断面涡激振动锁定区间、涡激共振振幅与单矩形断面进行了对比。结果表明:串列双矩形断面竖向涡激振动锁定区间、上游矩形断面扭转涡激振动锁定区间不因上、下游矩形断面间距比及阻尼比的影响而改变,下游矩形断面扭转涡激振动锁定区间随上、下游矩形断面间距比的变化而略有变化;上、下游矩形断面净间距和阻尼比对上、下游矩形断面竖向涡激及扭转涡激共振振幅有影响;对于上游矩形断面竖向和扭转涡激振动,D/B=0.5时干扰效应达到最大,D/B≥4时气动干扰效应可以忽略;而对于下游矩形断面的竖向和扭转涡激振动,D/B=0.5时干扰效应达到最大,D/B≥7时仍存在气动干扰效应,且表现为抑制作用。
Abstract
Aimed at aerodynamic interference on vortex-induced-vibration (VIV) of two rectangular cylinders in tandem in smooth flow, section models of windward and leeward rectangular cylinders in tandem with various ratios of separation distance to the width of single rectangular cylinder and various damping ratios were tested in smooth flow field in wind tunnel. The vortex lock-in regions and amplitudes of windward and leeward rectangular cylinders were compared with those of the single rectangular cylinder. The results show that the vortex lock-in regions of vertical vortex-induced vibration of windward and leeward rectangular cylinders and torsional vortex-induced vibration of windward rectangular cylinder are not affected by the factors, such as ratio of separation distance to width of the single rectangular cylinder and damping ratio. The vortex lock-in regions of torsional vortex-induced vibration of leeward rectangular cylinder are affected by ratio of separation distance to width of single rectangular cylinder. The amplitudes of vertical and torsional vortex-induced vibration of windward and leeward rectangular cylinders are affected by the factors, such as ratio of separation distance to width of single rectangular cylinder and damping ratio. The aerodynamic interference effect on vortex-induced vibration of vertical and torsional of windward rectangular cylinder is maximum when D/B is 0.5(D is distance between the two rectangular cylinders; B is the width of the single rectangular cylinder) and the effect can be neglected when D/B is larger than 4 to 6. The aerodynamic interference effect on vortex-induced vibration of vertical and torsional of leeward rectangular cylinder is maximum when D/B is 0.5. The effect exists and is expressed as inhibition state significantly when D/B is larger than 4 to 6.
关键词
桥梁工程 /
串列双矩形断面 /
风洞试验 /
涡激振动 /
气动干扰效应
{{custom_keyword}} /
Key words
bridge engineering /
two rectangular cylinders in tandem /
wind tunnel test /
vortex-induced vibration /
aerodynamic interference effect
{{custom_keyword}} /
中图分类号：
U441.3
{{custom_clc.code}}
({{custom_clc.text}})
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] ZDRAVKOVICH M M.Review of Flow Interference Between Two Circular Cylinders in Various Arrangements[J].Journal of Fluids Engineering,1977,99(4):618-633.
[2]姚熊亮,陈起富,徐文景.均匀流场串列圆柱涡激振动特性的实验研究[J].振动工程学报,1994,7(1):17-22.
YAO Xiong-liang,CHEN Qi-fu,XU Wen-jing.Experimental Research on Two Circular Cylinders in Tandem Arrangements at Critical Reynolds Numbers[J].Journal of Vibration Engineering,1994,7(1):17-22.
[3]TAKEUCHI T,MATSUMOTO M.Aerodynamic Response Characteristics of Rectangular Cylinders in Tandem Arrangement[J].Journal of Wind Engineering and Industrial Aerodynamics,1992,41(1/2/3):565-575.
[4]TAKEUCHI T,MATSUMOTO M.Vortex-induced Oscillations of Tandem Rectangular Bluff Bodies[C]//COOK N J.Wind Engineering:1st IAWE European and African Regional Conference.London:Thomas Telford Service Ltd,1993:421-430.
[5]KUMAR R A,GOWDA B H L,SOHN C H.Interference Excitation of a Square Section Cylinder[J].Journal of Mechanical Science and Technology,2008,22:599-607.
[6]KHANDURI A C,STATHOPOULOS T,BEDARD C.Wind-induced Interference Effects on Building－a Review of the State-of-the-art[J].Engineering Structures,1998,20(7):617-630.
[7]顾 明,黄 鹏.群体高层建筑风荷载干扰的研究现状及展望[J].同济大学学报:自然科学版,2003,31(7):762-766.
GU Ming,HUANG Peng.Research History and State-of-art of Interference Effects of Wind Loads of a Cluster of Tall Buildings[J].Journal of Tongji University:Natural Sciences,2003,31(7):762-766.
[8]ROWAN A I,STOYAN S,XIE J M,et al.Tacoma Narrows 50 Years Later－Wind Engineering Investigations for Parallel Bridges[J].Bridge Structures,2005,1(1):3-17.
[9]KIMURA K,SHIMA K,SANO K,et al.Effects of Separation Distance on Wind-induced Response of Parallel Box Girders[J].Journal of Wind Engineering and Industrial Aerodynamics,2008,96(6/7):954-962.
[10]KOLYUSHEV I,KIVILUOMA R.Aerodynamic Study of the Neva Twin Cable-stayed Bridge[C]//IABSE.IABSE Reports.Shanghai:IABSE,2004:260-261.
[11]刘志文,陈政清,刘 高,等.双幅桥面桥梁三分力系数气动干扰效应试验研究[J].湖南大学学报:自然科学版,2008,35(1):16-20.
LIU Zhi-wen,CHEN Zheng-qing,LIU Gao,et al.Experimental Study of Aerodynamic Interference Effects on Aerostatic Coefficients of Twin Decks Bridges[J].Journal of Hunan University:Natural Sciences,2008,35(1):16-20.
[12]刘志文,陈政清,胡建华,等.大跨度双幅桥面桥梁气动干扰效应[J].长安大学学报:自然科学版,2008,28(6):55-59.
LIU Zhi-wen,CHEN Zheng-qing,HU Jian-hua,et al.Aerodynamic Interference Effects on Twin Decks Bridges with Long-span[J].Journal of Chang'an University:Natural Science Edition,2008,28(6):55-59.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
基金
国家自然科学基金项目(50608030);国家自然科学基金项目(50738002)
{{custom_fund}}
{{custom_fund}}
PDF全文下载(973 KB)
