基于CR法的覆冰四分裂导线诱发脱冰算法研究  

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

作　　者：鲁佳帛 王家林[1] 吕中宾 黄瞻 范理 伍川 刘小会[1] LU Jia-bo;WANG Jia-lin;L Zhong-bin;HUANG Zhan;FAN Li;WU Chuan;LIU Xiao-hui(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;State Key Laboratory of Bridge and Tunnel Engineering in Mountain Areas,Chongqing Jiaotong University,Chongqing 400074,China;State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆交通大学省部共建山区桥梁及隧道工程国家重点实验室,重庆400074 [3]国网河南电力公司电力科学研究院,郑州450052

出　　处：《计算力学学报》2024年第6期1116-1123,共8页Chinese Journal of Computational Mechanics

基　　金：重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0166);重庆市研究生导师团队建设项目(JDDSTD2022003)资助

摘　　要：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,从而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,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 calculation program based on the Corotational method,which can quickly and accurately simulate the large-displacement geometrically 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 or 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.

关 键 词：四分裂导线 诱发脱冰 子导线 动力响应 

分 类 号：TM752[电气工程—电力系统及自动化] O242.21[理学—计算数学]