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[1]李 清,马 伦,解 健,等.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 Voltage Apparatus,2020,56(02):158-162.[doi:10.13296/j.1001-1609.hva.2020.02.023 ]
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大档距多分裂输电导线扭转刚度计算分析()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年02期
页码:
158-162
栏目:
研究与分析
出版日期:
2020-02-14

文章信息/Info

Title:
Calculation and Analysis on Torsional Stiffness of Large-span Multi-conductor Bundle
作者:
李 清12 马 伦1 解 健2 楼文娟2 李梦丽1
(1. 国网河南省电力公司电力科学研究院, 郑州 450052; 2. 浙江大学结构工程研究所, 杭州 310058)
Author(s):
LI Qing12 MA Lun1 XIE Jian2 LOU Wenjuan2 LI Mengli1
(1. State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China; 2. Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China)
关键词:
输电线路 分裂导线 大档距 扭转刚度 有限元法
Keywords:
transmission line conductor bundle large span torsional stiffness finite element method
DOI:
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.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-09-23; 修回日期:2019-11-26基金项目:国家电网公司重大科技项目(52170217000U);国家自然科学基金面上项目(51678525, 51372515)。Project Supported by Major Science and Technology Project of SGCC(52170217000U),National Natural Science Foundation of China (51678525,51372515).李 清(1965—),男,硕士,教授级高工,主要从事输电线路舞动、电气设备在线监测及故障诊断研究。马 伦(1989—),男,硕士,工程师,主要从事输电线路防灾技术研究。楼文娟(1963—),女,教授,博士生导师,主要从事结构风工程、输电线路抗风以及舞动问题等研究(通讯作者)。
更新日期/Last Update: 2020-02-14