郑云飞, 刘庆宽, 战启芳, 刘训臣, 刘晓庆. 螺旋线参数对斜拉索气动特性影响的试验研究[J]. 工程力学, 2020, 37(S): 301-306. DOI: 10.6052/j.issn.1000-4750.2019.04.S057
引用本文: 郑云飞, 刘庆宽, 战启芳, 刘训臣, 刘晓庆. 螺旋线参数对斜拉索气动特性影响的试验研究[J]. 工程力学, 2020, 37(S): 301-306. DOI: 10.6052/j.issn.1000-4750.2019.04.S057
ZHENG Yun-fei, LIU Qing-kuan, ZHAN Qi-fang, LIU Xun-chen, LIU Xiao-qing. EXPERIMENTAL STUDY ON HELICAL LINE PARAMENTS’ EFFECT ON AERODYNAMIC CHARACTERISTICS OF STAY CABLES[J]. Engineering Mechanics, 2020, 37(S): 301-306. DOI: 10.6052/j.issn.1000-4750.2019.04.S057
Citation: ZHENG Yun-fei, LIU Qing-kuan, ZHAN Qi-fang, LIU Xun-chen, LIU Xiao-qing. EXPERIMENTAL STUDY ON HELICAL LINE PARAMENTS’ EFFECT ON AERODYNAMIC CHARACTERISTICS OF STAY CABLES[J]. Engineering Mechanics, 2020, 37(S): 301-306. DOI: 10.6052/j.issn.1000-4750.2019.04.S057

螺旋线参数对斜拉索气动特性影响的试验研究

EXPERIMENTAL STUDY ON HELICAL LINE PARAMENTS’ EFFECT ON AERODYNAMIC CHARACTERISTICS OF STAY CABLES

  • 摘要: 斜拉索的大幅振动问题,例如风雨振、干索驰振,是桥梁设计和研究人员关注的问题之一。为了防止风雨振的发生,在斜拉索表面设置螺旋线是一种常见措施。而在进行螺旋线直径、间距选取时,只关注其对风雨振的影响,未考虑对干索驰振的影响。为了明确不同螺旋线参数组合对风雨振、干索驰振振动特性的影响,通过风洞试验的方法,在风速6 m/s~50 m/s范围内,在有、无人工模拟降雨环境下对不同螺旋线参数组合斜拉索进行测振试验,得到斜拉索模型振幅随螺旋线参数的变化规律。研究结果表明:总体而言,设置螺旋线后,斜拉索振幅减小,但斜拉索的振幅并非随螺旋线直径单调改变,呈现先增大后减小的趋势,螺旋线直径增大到某一数值时,振幅最大,工程应用中应慎重选择螺旋线的直径;随着螺旋线间距的增大,斜拉索振幅逐渐减小,设置螺旋线后,干索驰振的振幅明显减小;对于同一间距,螺旋线直径改变对干索驰振的影响不明显,对于同一直径,螺旋线间距小于临界间距后,螺旋线间距的改变对干索驰振的影响不明显,螺旋线间距大于临界间距后斜拉索发生明显振动。

     

    Abstract: The vibration-related problems of stay cables, such as rain-wind induced vibration and dry cable galloping, are one of the concerns of bridge designers and researchers. In order to prevent the occurrence of rain-wind induced vibration, it is a common measure to set the helical line on the surface of the cable. In the selection of the diameter and space of the helical line, the effects of rain-wind induced vibration are usually considered, while the effects of dry cable galloping are not. In order to clarify the influence of helical line parameters, wind tunnel tests were performed to obtain vibration control effects of helical lines with different diameters and spaces, in the wind speed range of 6 m/s ~ 50 m/s with and without rainfall. The results show that the amplitude of the stay cable generally decreases after the spiral is set, but it increases first and then decreases with the increase of the helical line diameter, so the diameter of helical line should be carefully selected in engineering applications. With the increase of helical line space, the amplitude of the stay cable gradually decreases. After the helical line is set, the amplitude of dry cable galloping is significantly reduced. For the same distance, the change in the diameter of helical line has no obvious effect on the dry-cable vibration of stayed cable. For the same diameter, when the helical line space is smaller than a critical space, the change of helical line space has no obvious effect on dry cable galloping, and the cable stay vibrates obviously when the helical line space is greater than the critical space.

     

/

返回文章
返回