输电塔线在覆冰与风载下的可靠性分析  

Reliability Analysis of Transmission Tower-line Considering Wind and Icing Loads

作　　者：冯径军[1,2] 柳春光[1] 冯娇[3] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024 [2]中国水电顾问集团西北勘测设计研究院,陕西西安710065 [3]中国兵器工业集团庆阳特种化工有限公司设计研究院,辽宁辽阳111001

出　　处：《水电能源科学》2011年第10期203-206,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50878039);国家973计划基金资助项目(200808025)

摘　　要：以湖南省郴州地区输电线路为例,构建了输电塔线体系精细化有限元模型,基于2008年南方覆冰实测资料,考虑输电塔角钢尺寸的不确定性、角钢材料性能随时间的老化及输电塔本身所受覆冰荷载和风荷载的随机性,采用蒙特卡罗法分析计算了4种工况下的可靠性。结果表明,随覆冰厚度的增加,输电塔的失效概率迅速增大,覆冰和风荷载共同作用是输电塔失效的主要原因,为重冰区覆冰架空输电线路技术设计提供了依据。Taking the transmission lines of Chenzhou City in Hunan Province for an example, the power transmission towerqines finite element model is established. According to icing measured data in south area in 2008, Monte Carlo method is used to calculate the reliability at four conditions by considering the uncertainty of the size of transmission tower angle steel, angle steel material properties with time of aging and load randomness of icing and wind. The results show that the failure probability of transmission tower increases rapidly with the ice thickness growing; icing and wind loads are the main reason for failure of power transmission towers. Therefore, it provides basis for technical design of overhead transmission line in heavy icing area.

关 键 词：输电塔线体系 覆冰荷载 可靠性 失效概率 

分 类 号：TM75[电气工程—电力系统及自动化] O342[理学—固体力学]