线性分布荷载作用下的大跨越档架空导线计算

Calculation of overhead wire rope sag for large crossings under linear distributed loads

为了对线性分布荷载作用下的大跨越档架空导线进行计算,采用抛物线法推导了大跨越档架空导线在均布荷载和三角形分布荷载共同作用下的弧垂函数、线长函数以及轴向张力的表达式。基于大跨越档架空导线的弧垂函数,计算了架空导线的最大弧垂值。通过分析可知:架空导线的最大弧垂取值点到低悬挂点的水平距离与均布荷载和三角形分布荷载的比值以及架空导线的档距有关。

In order to calculate the large crossings overhead wire rope sag under linear distributed loads,the expressions of sag function,line length function and axial tension of large crossings overhead wire rope sag under uniform load and triangle distributed load are derived by parabola method.Based on the sag function of large crossings overhead wire rope sag,the maximum sag value of overhead wire rope sag is calculated.Through the analysis,it can be seen that the horizontal distance from the maximum sag point to the low suspension point of the overhead wire rope sag is related to the ratio of the uniform load to the triangle distributed load and the span of the overhead conductor.