覆冰荷载下500kV输电塔失效模式研究  

Failure Mode Analysis for 500kV Transmission Tower under Icing Load

作　　者：刘春城[1] 胡晓炜[1] 乔亮[2] 曹玲[1] 张伟民[3] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]河南省电力公司洛阳供电公司,河南洛阳471000 [3]云南电网公司电力教育中心,云南昆明650204

出　　处：《水电能源科学》2013年第11期197-200,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50978049);中国电机工程学会电力青年科技创新基金资助项目(200836);吉林市杰出青年基金资助项目(200804)

摘　　要：以2008年初南方雪灾致输电塔倒塌为背景,利用ANSYS软件建立了某500kV输电线路的一塔两线体系精细化有限元模型,给出了利用荷载增量最小准则法搜寻输电塔主要失效模式的过程,计算了中、重冰区高压输电塔的主要失效模式,列出各失效路径中失效杆件的位置,进而对比分析了中、重冰区下输电塔结构的可靠性。结果表明,中冰区的输电塔的失效模式大部分在塔头位置,不能满足标准要求,而重冰区的主要失效模式出现在塔头部分的偏多,部分出现于塔身位置,相比于塔头,塔身部分的能满足标准要求。In the background of collapse of transmission tower caused by the snowstorms on early 2008, finite ele- ment model of 500 kV transmission tower-line system is established By using ANSYS. According to the minimum incre mental loading criterion, the failure mode of the transmission tower is obtained. Under medium and heavy icing area, it calculates the failure probability of these failure modes and lists the location of each failure path. The reliability of trans- mission tower structure is analyzed. The results show that under medium icing area, most elements of failure modes are located in tower head, which can not meet the requirements of criterion; under heavy icing area, fallure modes still are main located in tower head, but others are located in tower body, which can meet the requirements of criterion.

关 键 词：输电塔 覆冰 失效模式 ANSYS 

分 类 号：TM726.3[电气工程—电力系统及自动化]