梯形螺旋线对斜拉索上水线的影响及其减振效果研究

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摘要在滑移理论的基础上，通过COMSOL软件建立带有双螺旋线的斜拉索圆柱绕流模型，得到斜拉索的风压力系数和风摩擦系数。忽略斜拉索在横风向上的振动，通过改变风向得到在不同截面下带有双螺旋线的斜拉索受到的气动力，进而求得斜拉索的振动时程曲线及其频谱分析结果。结果显示，双螺旋线的存在抑制了水线在斜拉索表面的振荡，使得斜拉索在横风向受到的拉索气动力变化范围逐渐缩小，气动力的振荡频率远大于斜拉索的自振频率，降低了水线与斜拉索产生共振的可能性，从而抑制了斜拉索的风雨激振现象。

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	王剑1
	戚永圣2
	逯鹏3
	吴金团2
	关健1
	乔浩玥4

关键词 ：风雨激振, 气动减振, 螺旋线, 滑移理论, 水线

Abstract：On the basis of lubrication theory, a model of cylindrical flow around a stay cable with double helix was established by COMSOL software, and the wind pressure coefficient and wind friction coefficient of the stay cable were obtained. Ignoring the vibration of the stay cable in the cross-wind direction, the aerodynamic force of the stay cable with double helix under different cross-sections is obtained by changing the wind direction, that the vibration time history curve and frequency spectrum analysis of the stay cable are also obtained. The results show that the existence of the double helix suppresses the oscillation of the rivulet on the surface of the stay cable, so that the cable aerodynamic changes in the cross-wind directions gradually decrease, accompanied by the aerodynamic oscillation frequency is much greater than that of the cable stay. Therefore, the wind-rain-induced vibration of the cable is suppressed because of the possibility of resonance between the rivulet and the cable is greatly reduced.

Key words： rain-wind induced vibration aerodynamic vibration reduction spiral line lubrication theory rivulet

收稿日期: 2020-10-29 出版日期: 2022-03-15

引用本文:

王剑1，戚永圣2，逯鹏3，吴金团2，关健1，乔浩玥4. 梯形螺旋线对斜拉索上水线的影响及其减振效果研究[J]. 振动与冲击, 2022, 41(5): 235-242.
WANG Jian1, QI Yongsheng2, LU Peng3, WU Jintuan2, GUAN Jian1, QIAO Haoyue4. Influences of trapezoidal helix on waterline of stay cable and its vibration reduction effect. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(5): 235-242.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I5/235

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