In this paper, cross-flow vortex-induced vibration (VIV) responses of a circular cylinder surrounded with different control rods have been investigated in a wind tunnel. The number of rods n is set equal to 3 and 6, and the ratios of diameters d / D (where d is the diameter of small rods, D is the cylinder diameter) are assumed to 0.10, 0.16 and 0.20. The spacing ratios of s (s = G / D, where G is the gap distance between the main cylinder surface and the control rod surface) are selected as 0.2, 0.4 and 0.6 respectively. The Reynolds number based on the main cylinder is in the region of Re = 4 000–42 000. Results show that the VIV can be significant suppressed if placing the control rods in appropriate arrangement. And the gap between the rod and the main cylinder plays a more important role in the VIV amplitude response. When the spacing ratio between the rod and main cylinder is 0.2, VIV can be best suppressed by 96.7%. However, rods do not always suppress VIV and the responses can be more severe in other spacing ratios (s = 0.4, 0.6). And typical vortex shedding frequency lock-in phenomenon can be observed. When the spacing ratio is 0.2, other than the natural frequency component, St frequency is also presented in the frequency spectrum of wake velocity.

在本文中，已经在风洞中研究了被不同控制棒包围的圆柱体的错流涡激振动 (VIV) 响应。杆数n设置为 3 和 6，直径比d / D（其中d是小杆的直径，D是圆柱直径）假定为 0.10、0.16 和 0.20。s的间距比（s = G / D，其中G是主缸面与控制杆面的间隙距离）分别选取为0.2、0.4和0.6。基于主缸的雷诺数在Re = 4 000-42 000 范围内。结果表明，如果将控制杆放置在适当的位置，VIV 可以得到显着抑制。并且杆与主缸之间的间隙在VIV幅度响应中起更重要的作用。当杆与主缸的间距比为0.2时，VIV可最佳抑制96.7%。然而，杆并不总是抑制 VIV 并且在其他间距比（s= 0.4, 0.6)。并且可以观察到典型的涡旋脱落频率锁定现象。当间距比为0.2时，尾流速度频谱中除了固有频率分量外，还存在St频率。