拉线初始预应力分布对拉线杆塔受力影响的研究  

Influence of Initial Prestress Distribution of Guy for Mechanics of Guyed Transmission Tower

作　　者：甘凤林[1] 李小磊[1] 高黔 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]安徽省蚌埠市供电公司,安徽蚌埠233040

出　　处：《广东电力》2010年第9期7-10,26,共5页Guangdong Electric Power

基　　金：东北电网科技基金资助项目(2008371)

摘　　要：鉴于拉线塔的重要性及受力特性,应用结构分析软件ANSYS对拉线塔建立相应的非线性有限元模型,并以东长哈送电线路87号拉门塔为例,研究拉线初始预应力的分布,找出拉线初始预应力分布对拉门塔受力性能影响的规律。研究结果表明:拉线初始预应力对拉门塔初始状态下的支座反力、节点位移和杆件轴向应力的影响呈线性关系,对荷载状态下的受力性能的影响呈非线性关系,因此,应优化选取拉线初始预应力。In view of the mechanical characteristic and the importance of guyed transmission tower,the paper builds corresponding nonlinear finite element model of guyed transmission tower by using structural analytic software ANSYS.Taking a guyed portal transmission tower as an example,an investigation is made into the initial prestress distribution of guy,thus identifying the law between initial prestress distribution of guy and mechanical properties of guyed portal tower.Research findings show that the initial prestress of guy exerts linear-relationship influence on base counteracting force under initial condition,node displacement and stem axial stress of guyed portal tower,and nonlinear-relationship influence on mechanical properties under load condition.As a result,the initial prestress of guy should be selected optimally.

关 键 词：拉线塔 非线性有限元 拉线初始预应力 ANSYS软件 拉线塔受力 

分 类 号：TM753[电气工程—电力系统及自动化]