Calculation and Analysis on Torsional Stiffness of Large-span Multi-conductor Bundle

LI Qing; MA Lun; XIE Jian; LOU Wenjuan; LI Mengli

doi:10.13296/j.1001-1609.hva.2020.02.023

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Calculation and Analysis on Torsional Stiffness of Large-span Multi-conductor Bundle

更新时间：2025-04-26

- Calculation and Analysis on Torsional Stiffness of Large-span Multi-conductor Bundle
- High VoltageApparatus Vol. 56, Issue 2, Pages: 158-162(2020)
- 作者机构：
  
  1. 国网河南省电力公司电力科学研究院
  2. 浙江大学结构工程研究所
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.02.023
  CLC： TM75
- Published：2020
- 稿件说明：
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[1]李清,马伦,解健,楼文娟,李梦丽.大档距多分裂输电导线扭转刚度计算分析[J].高压电器,2020,56(02):158-162.

LI Qing, MA Lun, XIE Jian, et al. Calculation and Analysis on Torsional Stiffness of Large-span Multi-conductor Bundle[J]. High voltageapparatus, 2020, 56(2): 158-162.
[1]李清,马伦,解健,楼文娟,李梦丽.大档距多分裂输电导线扭转刚度计算分析[J].高压电器,2020,56(02):158-162. DOI： 10.13296/j.1001-1609.hva.2020.02.023.

LI Qing, MA Lun, XIE Jian, et al. Calculation and Analysis on Torsional Stiffness of Large-span Multi-conductor Bundle[J]. High voltageapparatus, 2020, 56(2): 158-162. DOI： 10.13296/j.1001-1609.hva.2020.02.023.

摘要

大档距输电线路弧垂较大

弧垂对多分裂导线扭转刚度的影响不可忽略。文中分别采用LINK单元和BEAM单元模拟子导线和间隔棒

建立了大档距多分裂导线的精细有限元模型。通过输电线路的找形分析考虑导线自重、弧垂对初始张力和几何构型的影响

建立了扭矩与扭转角的关系

从而确定了多分裂导线的整体扭转刚度。与已有的试验结果对比表明

文中基于找形分析的有限元模型所得扭转刚度具有较高的精度。在此基础上

进一步研究了不同档距和不同初始张力下的扭转刚度变化规律

分析了目前常用的Nigol扭转刚度计算公式的误差及其产生的原因

指出了Nigol方法不适用于大档距分裂导线扭转刚度的计算。文中方法可较为精确地确定大档距多分裂导线的扭转刚度

为大档距输电线路抗翻转和抗舞动设计计算提供参考。

Abstract

To reveal the effect of sag of large-span multi-conductor bundle on its torsional stiffness

a refined finite element model of large-span multi-conductor bundle is built by using LINK and BEAM elements to simulate the conductors and spacers

respectively.With the form finding analysis on the model

the effects of self-weight and sag of the bundle on initial tension and geometric configuration of transmission line are considered.Then

the relation between torque and rotation angle of the bundle is established to derive the entire torsional stiffness.Thus obtained torsional stiffness has high accuracy compared with test results.Furthermore

the effects of span length and initial tension of the conductor bundle on its torsional stiffness are investigated.The deviation of the Nigol ’s calculating formula of torsional stiffness

as well as the causes of the deviation

is analyzed

and conclusion is drawn that the Nigol’ s formula is not applicable to large-span multi-conductor bundle.The present method can accurately calculate torsional stiffness of large-span multi-conductor bundle

hence it may facilitate the anti-overturning and anti-galloping design of large-span transmission line.

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