串列双流线型断面涡激振动气动干扰试验  

Aerodynamic Interference Test on Vortex-induced Vibration of Two Streamline Cylinders in Tandem

作　　者：刘志文[1] 陈政清[1] 栗小祜[1,2] 周帅[1,3] 吕建国[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南省通平高速公路建设开发有限公司,湖南岳阳414500 [3]广西交通投资集团有限公司,广西南宁530028

出　　处：《中国公路学报》2011年第3期51-57,共7页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50608030);国家自然科学基金项目(50738002)

摘　　要：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、下游流线型断面涡激振动气动干扰进行了风洞试验研究,并将上、下游流线型断面涡激振动锁定区间、涡激振动振幅与单流线型断面进行了对比。结果表明:上、下游流线型断面涡激振动锁定区间不因D/B及阻尼比的影响而改变,上、下游流线型断面D/B和阻尼比对其涡激振动振幅有影响;上游断面涡激振动气动干扰效应主要受D/B的影响,当D/B≤3时,对上游断面涡激振动的干扰效应表现为增大效应;当D/B>3时,对上游断面涡激振动的干扰效应可忽略;下游断面涡激振动气动干扰效应主要受上游断面涡激振动振幅影响,当上游断面振幅较大时,其对下游断面干扰效应主要表现为抑制作用;当上游断面振幅较小时,其对下游断面干扰效应则表现为增大效应;随着双幅断面间距增加,干扰效应逐渐减弱。Wind tunnel tests of aerodynamic interference on vortex-induced vibration（VIV） of windward and leeward streamlines with different separation ratios D/B and different damping ratios in smooth flow field were carried out.The lock-in regions and VIV amplitudes of windward and leeward streamline cylinders were compared with those of single streamline cylinder.The results show that the lock-in regions of VIV of windward and leeward streamline cylinders are not affected by D/B and damping ratio.However,the amplitudes of VIV of windward and leeward streamline cylinders are affected by the two factors.The aerodynamic interference effects on VIV of windward streamline cylinder are mainly affected by D/B.When D/B is less than or is equal to 3,the interference effects of VIV of windward streamline cylinder are large.When D/B is larger than 3,the aerodynamic interference effects on VIV of windward streamline cylinder can be neglected.The aerodynamic interference effects on VIV of leeward streamline cylinder are mainly affected by the VIV amplitudes of windward streamline cylinder.When the VIV amplitudes of windward streamline cylinder are large,the interference effects of leeward streamline cylinder will be suppressed.However,the interference effects of leeward streamline cylinder increase when the VIV amplitudes of windward streamline cylinder are small.The interference effects of leeward streamline cylinder decrease with increasing of space of two streamline cylinders.

关 键 词：桥梁工程 串列双流线型断面 风洞试验 气动干扰效应 涡激振动 均匀流 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]