A rectangular cylinder in a fluid flow is known to show complicated cross-flow vibration behavior due to the interaction between the Kármán vortex-induced vibration and galloping. Wind tunnel experiments were carried out to investigate the cross-flow vibration behavior of several rectangular cylinders for which different stream-wise lengths, B and a fixed cross-flow height, D were used to define the side ratio, B/D of 1.0, 1.2, 1.4, and 1.6. For the isolated cylinder, stronger interaction between KVIV and galloping was demonstrated as the B/D was increased. The placement of a downstream square plate at a gap, S from the cylinder had a significant effect on the peak of VIV, A_VIV of the cylinder. With the downstream square plate at S/D ​= ​1.17, the A_VIV was enhanced about five times than that of the isolated cylinder (B/D ​= ​1.0). In contrast, the A_VIV was suppressed by about 50% for two cylinders, B/D ​= ​1.2 and 1.6, with S/D ​= ​1.15 and 2.12, respectively. However, galloping was significantly enhanced for two cylinders, B/D ​= ​1.2 and 1.4 with S/D ​= ​1.15. These findings are useful to develop a vibration control technique crucial to avoid hazardous vibrations or to induce vibrations for beneficial purposes.

已知在流体流中的矩形圆柱体由于Kármán涡流诱发的振动与驰豫之间的相互作用而表现出复杂的横流振动行为。进行风洞实验以研究几个矩形圆柱的横流振动行为，其中使用不同的流向长度B和固定的横流高度D定义边比B / D为1.0， 1.2、1.4和1.6。对于隔离的圆柱体，随着B / D的增加，KVIV和舞动之间的相互作用更强。将下游方板放置在距离圆柱体S的间隙处对VIV的峰值A _VIV有显着影响的圆柱体。下游方板的S / D  = 1.17时，A _VIV增强了约比孤立圆柱体的五倍（B / D  = 1.0）。相比之下，两个气缸的B / D值分别 为1.2 / 1.6和A / D 分别为1.15和2.12，使A _VIV降低了约50％。但是，对于两个气缸，B / D  = 1.2和1.4的S / D  = 1.15 ，舞动显着增强。这些发现对于开发振动控制技术非常有用，该技术对于避免有害振动或有益于诱发振动至关重要。