摘要
采用非线性有限元分析方法研究了塔线耦合体系覆冰导线舞动的规律及特点,以及输电线舞动对酒杯塔受力及变形的影响发现绝缘子的布置型式对覆冰导线舞动的幅值及规律有很大的影响;由于塔线耦合的作用,左右跨的各相导线在具有相同覆冰厚度、形状以及受相同气动载荷情况下,所形成的舞动幅值及相位存在差异,从而导致输电线作用在塔上的力沿各方向分力不平衡,导致输电塔产生沿导线方向侧弯变形、与导线垂直方向侧弯变形以及横担的扭转变形;在导线舞动过程中输电塔的最大应力交替出现在塔头刚度较弱的部位.
The nonlinear finite element analysis is used to study the galloping law, characteristics of iced conductors on transmission tower-line coupling system; and the influence on force and deformation of cup type tower . The results indicate that the layout of insulators has a great effect on galloping law and ampli- tude of iced conductors; as a result of tower-line coupling, there is difference in amplitude and phase for each phase conductor of left and right spans although they have the same ice thickness, shape and subject the same aerodynamic loads; so that the component forces in every direction on transmission tower caused by conductors are unbalanced; therefore the transmission tower produces lateral and along the conductor longitudinal direction bending deformation, and torsion deformation in the crossarm position; the maxi mum stress of transmission tower in the process of conductor galloping appears alternately in the weak stiffness parts of the tower head.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2014年第3期394-398,406,共6页
Engineering Journal of Wuhan University
基金
国家自然科学基金项目(编号:10872141)
天津市自然科学基金项目(编号:11JCYBJC05800)
关键词
非线性有限元
覆冰导线
舞动
塔线耦合
nonlinear finite elements
iced conductor
galloping
tower-conductor coupling
