覆冰多分裂输电导线舞动的动态张力随机分析与可靠度评估  

Stochastic dynamic tension analysis and reliability evaluation of ice-covered multi-split transmission line galloping

作　　者：李正良[1,2] 王泽宇 王涛 吕大刚 谭忆秋[3,4] LI Zhengliang;WANG Zeyu;WANG Tao;LYU Dagang;TAN Yiqiu(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education,Chongqing University,Chongqing 400044,China;School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,China;Chongqing Research Institute of Harbin Institute of Technology,Harbin Institute of Technology,Chongqing 401151,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400044 [3]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090 [4]哈尔滨工业大学重庆研究院,重庆401151 [5]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《振动工程学报》2025年第3期529-538,共10页Journal of Vibration Engineering

基　　金：重庆市博士后研究项目特别资助(2022CQBSHBT3009);哈尔滨工业大学重庆研究院博士后特别支持计划(KY506023002)。

摘　　要：结合有限元模型与概率密度演化法,建立了针对覆冰多分裂输电线舞动的动态张力随机分析方法;通过等价极值分布法构建了覆冰多分裂导线舞动的拉断破坏失效准则,进而发展了一种覆冰多分裂输电导线舞动可靠度评估框架;对某单跨覆冰四分裂输电导线进行随机动力响应分析与可靠度评估。算例分析表明:本文方法可高效地分析该跨覆冰输电导线舞动的随机动态张力,导线进入稳定舞动阶段后随机动态张力受多模态共同影响;导线舞动时的拉断破坏可靠概率不会随着初始垂度的增加而单调增加;初始风攻角对导线舞动时的拉断破坏可靠概率影响显著,初始风攻角为20°~60°时该跨导线可靠概率较低。In response to the galloping issue faced by ice-covered multi-split transmission lines,this study proposes a method based on the probability density evolution approach for dynamic tension stochastic analysis and reliability evaluation of such transmission lines.A stochastic analysis method for the dynamic tension in ice-covered multi-split transmission lines is established by integrating the finite element model with the probability density evolution technique.A tensile failure criterion for ice-covered multi-split transmission lines is developed by using the equivalent extreme value distribution method,and a framework for reliability evaluation of the transmission lines is constructed.Stochastic dynamic response analysis and reliability evaluation on a single-span ice-covered four-split transmission line are conducted.The analysis of the example shows that:The method in this paper can efficiently analyze the stochastic dynamic tension of the ice-covered four-split transmission line,and the stochastic dynamic tension is influenced by multiple modes after the transmission line enters the stable galloping stage;The tensile failure reliability probability of transmission lines during galloping does not exhibit a monotonous relationship with the increase of initial sag;The initial wind attack angle plays a crucial role in determining the tensile failure reliability probability of the transmission line,and the reliability of the transmission line is relatively low when the initial wind attack angle falls within the range of 20°to 60°.

关 键 词：覆冰多分裂输电导线 舞动 动态张力 随机动力响应 动力可靠度 

分 类 号：TM726.6[电气工程—电力系统及自动化] TU312.1[建筑科学—结构工程] O324[理学—一般力学与力学基础]