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Research on icing four-split wire-induced de-icing algorithm based on CR method

DOI：

 作者 单位 邮编 鲁佳帛* 重庆交通大学 土木工程学院，重庆 400000 400000 王家林 重庆交通大学 土木工程学院，重庆 400000 吕中宾 国网河南电力公司电力科学研究院, 郑州, 450052 黄瞻 重庆交通大学 土木工程学院，重庆 400000 范理 重庆交通大学 土木工程学院，重庆 400000 伍川 国网河南电力公司电力科学研究院, 郑州, 450052 刘小会 重庆交通大学 土木工程学院，重庆 400000

为了更真实、快速地模拟覆冰分裂导线的诱发脱冰过程，本文基于Co-rotational理论法开发了梁单元有限元计算程序，可以快速准确地模拟间隔棒的大位移几何非线性问题。将梁单元退化为杆单元，该单元可以快速准确地计算覆冰导线空间大范围的运动，通过算例验证了方法的可靠性。最后定义了覆冰脱落加速度判定准则，建立了覆冰四分裂导线的诱发脱冰有限元模型。针对该有限元模型研究了不同子导线在不同覆冰厚度、初始脱冰位置和临界加速度时各子导线的脱冰跳跃高度及变化规律。结果表明：不同子导线初始脱冰产生的诱发脱冰效应会产生不同的冰跳效应，接近非诱发脱冰模式的1.25倍;下子导线所引起的诱发效应远大于上子导线;覆冰厚度越厚，初始脱冰位置越靠近中点，临界加速度越小，所引起的诱发效应越大。本文模拟结果可为重冰区输电线路设计提供参考，本文提出的模拟方法可为分裂导线脱冰、除冰的仿真提供了一种新的研究思路。

In order to more realistically and quickly simulate the induced de-icing process of ice-coated and split conductors, this paper develops a beam element finite element calculation program based on the Co-rotational theory method, which can quickly and accurately simulate the large-displacement geometric nonlinear problem of spacers. The beam element is degenerated into a rod element, which can quickly and accurately calculate the large-scale motion of the ice-coated wire space, and the reliability of the method is verified by an example. Finally, the judging criterion of the ice-coated shedding acceleration is defined, and the finite element model of the ice-coated four-split conductor induced de-icing is established. According to the finite element model, the de-icing jump height and variation law of each sub-conductor under different ice thickness, initial de-icing position and critical acceleration are studied. The results show that: the induced de-icing effect of different sub-conductors will produce different ice jump effects, which are close to 1.25 times of the non-induced de-icing mode; the induced effect caused by the lower sub-conductor is much larger than that of the upper sub-conductor; thicker, the closer the initial deicing position is to the midpoint, the smaller the critical acceleration, and the greater the induced effect. The simulation results in this paper can provide a reference for the design of transmission lines in heavy ice areas, and the simulation method proposed in this paper can provide a new research idea for the simulation of deicing and deicing of split conductors.
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