摘要
以湖南某220 k V输电线工程为原型,基于动力相似理论,设计了缩尺比为1︰20的2档塔线体系试验模型.采用程控方式控制模拟覆冰荷载的脱落,实现了拉链式脱冰和同时脱冰、整档脱冰与局部脱冰等多种工况.通过对这些脱冰工况下输电线的位移瞬态响应进行测试与分析,得出了脱冰动荷系数和跳跃高度随脱冰速度、脱冰量以及脱冰位置等参数的变化规律,这些规律可为塔线体系的设计提供参考.
Taking the 220 kV transmission line in Hunan province as the prototype,a test model of double-span tower-line system with scale ratio of 1 ∶ 20 was designed on the basis of dynamic similarity theory. A program was developed to control the shedding of ice load,and different working conditions including zippered and simultaneous ice-shedding in entire and part span was simulated.The transient response of the transmission line in these ice-shedding condition was tested and analyzed,according to the results of experimental study,the change rule of dynamic load coefficient and the jump height with the change of ice-shedding speed,quantity and location was obtained,which may provided the design basis of tower-line system.
作者
谢献忠
刘赛
王文军
梁开元
Xie Xianzhong;Liu Sai;Wang Wenjun;Liang Kaiyuan(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2019年第1期70-76,共7页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金资助项目(11272119)
关键词
输电线路
相似理论
脱冰
跳跃高度
动荷系数
transmission line
similarity theory
ice-shedding
jump height
dynamic load coefficient
