欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
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。
英文摘要：
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.
同期刊论文项目
同项目期刊论文
Investigation on influence factors of buffeting response of bridges and its aeroelastic model verifi
Investigation of Locking Force for Stay Cable Vibration Control Using Magneto-Rheological Fluid Damp
Influence of arrangement field on magnetostrictive and mechanical properties of magnetostrictive com
期刊信息
位置：