覆冰输电线结构及载荷对舞动的影响  

Influence of conductor structure and loads on galloping of a transmission line

作　　者：周坤涛[1,2] 郝淑英[1] 刘君[1] 张琪昌[3] 

机构地区：[1]天津理工大学机械工程学院,天津300384 [2]天津电子信息职业技术学院机电技术系,天津300132 [3]天津大学机械工程学院力学系,天津300072

出　　处：《振动与冲击》2012年第1期116-120,共5页Journal of Vibration and Shock

基　　金：天津市自然科学基金(11JCYBJC05800);国家自然科学基金(10872141)

摘　　要：为深入研究导线结构形式对输电线路系统动力学特性影响,以及导线结构形式及气动扭转载荷对覆冰输电线路舞动规律及幅值的影响,采用ANSYS参数化设计语言编写了计算导线舞动的非线性有限元分析程序,计算得出了系统气动载荷作用下的时间历程曲线。发现:在相同的气象条件下,分裂导线的振幅明显大于单根导线,且分裂数越高,导线越容易在短时间内形成稳态的舞动,应尽量采用单根导线或减少导线分裂数;扭转气动力载荷对面内外舞动的规律及幅值影响不大,对扭转角的幅值有较大影响,因此可忽略扭转气动载荷对断线和倒塔的作用。For profoundly understanding influence of conductor structure forms and aerodynamic torsion loads on dynamic characteristics, galloping law and amplitude of an iced transmission line, a computer program based on nonlinear finite element analysis was developed using ANSYS parametric design language, time history curves were computed. Results indicated that the galloping amplitude of the bundle conductors is obviously greater than that of a single conductor, time needed to enter a steady state of galloping decreases noticeably as more conductors are added; consequently, in the same weather conditions, single conductor and less conductors in bundle should be adopted; aerodynamic torsion loads have slight influence on galloping law and amplitude for in-plane and out-of-plane galloping, but have a greater effect on amplitude of torsion angle ; therefore the effect of aerodynamic torsion loads on breaking of an iced transmission line and its towers can be ignored.

关 键 词：输电线结构 舞动 有限元 气动扭转载荷 动力学响应 

分 类 号：TM75[电气工程—电力系统及自动化] O323[理学—一般力学与力学基础]