覆冰输电线路铁塔非线性屈曲分析  

Analysis on Nonlinear Buckling of Icing Power Transmission Line Tower

作　　者：徐冠华[1] 黄新波[2] 肖渊[1] 廖明进[2] 

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]西安工程大学电子信息学院,陕西西安710048

出　　处：《广东电力》2015年第8期93-96,共4页Guangdong Electric Power

基　　金：国家自然科学基金资助项目(51177115);教育部"新世纪优秀人才支持计划"(NCET-11-1043);陕西省重点科技创新团队计划(2014KCT-16)

摘　　要：为明确输电塔稳定特性,揭示冰厚、档距、风载、地形地貌、覆冰形式等参数对输电塔稳定性的影响规律,采用数值模拟方法建立塔线体系有限元模型,对铁塔的极限承载能力在不同影响因子作用下的变化特性进行研究。研究表明:输电塔失稳时,其临界冰厚随着垂直档距的增加呈减小的趋势;覆冰与风载荷共同作用下,其临界风速与冰厚呈反比例关系;不均匀覆冰作用下,输电塔的极限承载能力随不均匀系数的增加而降低。In order to confirm stability of power transmission tower,reveal influencing laws on stability of power transmis-sion tower of parameters including ice thickness,span,wind load,landform and icing form,numerical stimulation method was used for establishing finite element model of tower line system and studying changing characteristic of limit carrying ca-pacity of the tower under different impact factors.Research indicates that at the time of unstability of the power transmis-sion tower,its critical ice thickness might present decreasing tendency with increase of vertical span.Meanwhile,under combined action of icing and wind load,critical wind speed of the power transmission tower shows a reverse relationship with icing thickness while under uneven icing action,the limit carrying capacity of the power transmission tower may reduce with increase of uneven coefficients.

关 键 词：塔线体系 覆冰 风载荷 屈曲分析 稳定性 

分 类 号：TM75[电气工程—电力系统及自动化]