广东电力2017，Vol.30Issue(4)：108-114,7.DOI:10.3969/j.issn.1007-290X.2017.04.019
输电导线微风振动疲劳损伤机理
Fatigue Damage Mechanism on Breeze Vibration of Transmission Conductors
摘要
Abstract
Long-time breeze vibration of transmission conductors will cause conductor strand breakage and even endanger safe operation of lines.Therefore, this paper firstly uses finite element simulation software for modeling LGJ150-25 steel reinforced aluminum conductor and then analyzes contact wearing between strands so as to evaluate generation of contact cracks and extension degree.Finally, it develops analysis mechanism on strand breakage by combining current conductor fatigue theory.Results indicate that the main function of the inner steel core of the conductor is load bearing, thus generation rate of contact wearing and cracks of the inner and second inner steel cores is far less than that of outer strands.Adhesive wearing will occur at contact points of the outermost layer and second outer layer aluminum strands when amplitude is less than 0.1 mm while skimming wearing occurs when amplitude is more than 0.1 mm.In addition, when amplitude is more than 0.1 mm and under the common action of contact wearing and plastic deformation, a large number of cracks will come into being at contact points of adjacent layer aluminum strands at the clamp exit.Meanwhile, cracks sharply extend and strengthen which seriously endanger normal operation of transmission lines.关键词
微风振动/疲劳损伤/磨损/振幅/拉力载荷Key words
breeze vibration/fatigue damage/wear/amplitude/tensile load分类
信息技术与安全科学引用本文复制引用
司伟杰,黄新波,赵隆,陈子良,潘高峰..输电导线微风振动疲劳损伤机理[J].广东电力,2017,30(4):108-114,7.基金项目
陕西省重点科技创新团队计划 (2014KCT-16) （2014KCT-16）
陕西省工业科技攻关项目(2016GY-052) （2016GY-052）
