考虑弯曲刚度影响的跳线长度计算

为解决高压输送电路工程实际中所遇到的跳线线长计算不准确，施工困难以及优化铁塔等问题，文章进行跳线刚度研究．由力学角度分析了干字型塔及桥型塔跳线特点，从悬链线模型人手，充分利用柔性梁的分析方法，据所给出的边界条件求出其解析解，并对该解析式进行数值积分．同时考虑在3种状态下对电气间隙的影响，从而得出考虑刚性影响以后的跳线线长计算公式，并附以算例．结果显示所得线长明显比悬链线的线长短，从经济利益的长远角度出发表明电线刚性不能被忽略，该文具有较强的针对性和实用性。

Calculation on length of jumping-line considering influence of bending strength

In order to solve the problem of calculating the length of jumping-line in engineering practical fielas, rigidity was researched. Analysis was done on the umping-line's characteristics of the strain tower from the mechanics angle. Starting with a suspension line model and making full use of the soft beam's analysis method, analytic interpretation can be solved with the boundary condition. Then the numerical integral can be obtained. At the same time, the calculation formula of the length of jumping-line considering influence of rigidity can be got after considering three kinds of the influence of electricity cleft, and an example was given. The results show that the length of the line is obviously shorter than that of the suspension line. For long-term planning the results indicate that the rigidity of jump-line cannot be neglected and play a directive role in the design in the engineering practical fields.