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螺旋线是常用的抑制斜拉索风雨振的措施。为了研究优化的螺旋线参数,通过风洞试验的方法,针对直径分别为90 mm、110 mm、155 mm、160 mm的斜拉索模型,分别缠绕0.7 mm~3.0 mm直径的单螺旋线或双螺旋线,考察了螺旋线直径、缠绕方式、缠绕的间距等参数对不同直径斜拉索风雨振的抑振效果,发现在斜拉索直径不变的情况下,对于同一螺旋线间距,螺旋线直径越大抑振效果越明显;对于同一螺旋线直径,螺旋线间距越小抑振效果越明显;对于同一螺旋线直径和相同的缠绕方式,斜拉索直径越大,抑振需要的螺旋线间距越小。针对不同直径的斜拉索,为了达到抑振效果,提供了所需要的螺旋线参数组合,为实际工程设计提供了参考。在实际工程中,需要针对斜拉索直径、表面真实状态以及斜拉索生产和安装等各种因素综合考虑各参数组合。
Helix is commonly used to inhibit the wind and rain vibration cable stay. In order to study the optimized parameters of helix, wind tunnel tests were performed on a 90 °, 110 mm, 155 mm and 160 mm diagonal cable model with single helix of 0.7 mm to 3.0 mm diameter or double The effects of helical diameter, winding method and winding pitch on the vibration and vibration suppression of diagonal cables with different diameters were investigated. It was found that for the same helix pitch, the helix The larger the diameter is, the more obvious the vibration suppression effect is. For the same helix diameter, the smaller the helix spacing is, the more obvious the vibration suppression effect is. For the same helix diameter and the same winding mode, The smaller the pitch. For diagonal cables with different diameters, in order to achieve the vibration suppression effect, the required combination of helical parameters is provided, which provides a reference for the actual engineering design. In the actual project, it is necessary to consider various combinations of parameters in view of the diagonal cable diameter, the real state of the surface and the production and installation of the stay cables.