Circular section tubular members with smaller wind load shape coefficient and higher stability are widely used in ultra-high-voltage (UHV) transmission towers. However, the tubular members, especially those with a large slenderness ratio, are prone to vortex-induced vibration (VIV) within a specific wind speed range. The sustained vibration of members can easily cause fatigue failure of joints and threaten the operational safety of transmission lines. Consequently, a novel countermeasure for the VIV of tubular towers using a new type of radial spoiler is proposed, whose mechanism is to change the vortex shedding frequency by destroying the large-scale vortexes into small-scale vortexes. Then, the parametric analysis of different variables is carried out based on the orthogonal experiment and numerical simulation, including the height H and length B of the spoiler and the distance S between adjacent spoilers. The results show that the above three parameters all have significant influences on vortex shedding frequency. Additionally, a practical design method of the new radial spoiler is proposed, and the recommended values of H, B, and S are 1D∼2D, 1.5H∼3H, and 5D∼12.5D, respectively, where D is the diameter of the tubular member. Finally, a numerical verification of the suppression effects is carried out, demonstrating that the proposed quick design method is simple and reliable, which can be widely used in the VIV design of tubular towers.

中文翻译：

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一种新型管式塔筒涡激振动径向扰流板及其实用设计方法

具有较小风荷载形系数和较高稳定性的圆截面管状构件被广泛应用于特高压（UHV）输电塔。然而，管状构件，尤其是长细比较大的管状构件，在特定风速范围内容易发生涡激振动（VIV）。构件的持续振动容易引起接头疲劳失效，威胁输电线路的运行安全。因此，提出了一种新型径向扰流器管塔VIV的新对策，其机制是通过破坏大尺度涡流为小尺度涡流来改变涡流脱落频率。然后，在正交试验和数值模拟的基础上，对不同变量进行参数分析，包括高度扰流板的H和长度B以及相邻扰流板之间的距离S。结果表明，上述三个参数均对涡旋脱落频率有显着影响。此外，提出了一种新型径向扰流器的实用设计方法，H、B和S的推荐值分别为1 D ∼2 D、1.5 H ∼3 H和5 D ∼12.5 D，其中D是管状构件的直径。最后，对抑制效果进行了数值验证，表明所提出的快速设计方法简单可靠，可广泛应用于管塔的VIV设计。