分裂导线扭转特性缩尺模型试验与分析

Scale Model Test and Analysis of Torsional Property of Bundle Conductor

大档距多分裂导线翻转扭绞故障时有发生,为此设计并研制了一套研究分裂导线扭转特性的缩尺模型试验装置。依据分裂导线力学基本关系并结合量纲分析法,建立双尺度模型相似关系,以某680m档距的四分裂实际线路为例,通过模型试验和有限元数值模拟方法,基于扭矩-扭转角关系曲线分别着重研究分裂导线间隔棒数目、导线垂度(张力)参数对扭转刚度和翻转倾覆扭矩的影响,可为分裂导线防翻转倾覆设计提供参考。

As bundle conductors are experiencing turnover and twisting accidents frequently, a scale model test device for the research of torsional property of bundle conductors is designed and developed. According to the basic relationship of bundle conductor mechanics and the dimension analysis method, the similarity relations of the two-scale model are established. Taking a 680m-span line on quad bundled as an example, the model tests and the finite element numerical simulation method are carried out to study the effects of spacer numbers and sag (tension) parameters of bundle conductors on the torsional stiffness and overturning torque based on the relation curve between torque and torsion angle, which can provide reference for the anti-overturning design of bundle conductors.