| 鲁佳帛,王家林,吕中宾,黄瞻,范理,伍川,刘小会.基于CR法的覆冰四分裂导线诱发脱冰算法研究[J].计算力学学报,2024,41(6):1116~1123 |
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| 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 |
| 投稿时间：2023-06-18 修订日期：2023-08-03 |
| DOI：10.7511/jslx20230618002 |
| 中文关键词: 四分裂导线 诱发脱冰 子导线 动力响应 |
| 英文关键词:quad bundle conductors ice-shedding induce effect sub-conductor dynamic response |
| 基金项目: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. |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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