覆冰八分裂导线舞动过程中的次档距振动研究  

Investigation on the Sub-span Oscillation in the Process of Galloping of Iced Eight-bundle Conductors

作　　者：刘宇 蔡萌琦 王清远 黄春林[1] 丁顺利 周林抒 LIU Yu;CAI Meng-qi;WANG Qing-yuan;HUANG Chun-lin;DING Shun-li;ZHOU Lin-shu(School of Mechanical Engineering, Chengdu University, Chengdu 610106, China;School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China;Key Laboratory of Destructive Mechanics and Engineering Disaster Prevention and Mitigation, Sichuan University, Chengdu 610065, China;State Grid Sichuan Integrated Energy Service Co., Ltd., Chengdu 610031, China)

机构地区：[1]成都大学机械工程学院,成都610106 [2]成都大学建筑与土木工程学院,成都610106 [3]四川大学破坏力学与工程防灾减灾四川省重点实验室,成都610065 [4]国网四川综合能源服务有限公司,成都610031

出　　处：《科学技术与工程》2022年第12期4843-4848,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51507106);模式识别与智能信息处理四川省高校重点实验室开放基金(MSSB-2020-05);成都市国际科技合作资助项目(2020-GH02-00059-HZ)。

摘　　要：为了给覆冰八分裂输电线路的舞动特性和防振提供参考,通过数值分析的方法分析了八分裂导线的次档距振动现象和特征,对比数值模拟结果,寻找各子导线间的运动轨迹及舞动幅值的异同。结果表明:覆冰八分裂输电线路各子导线在不同风速下舞动的方向均相同,但因受尾流干扰和气动载荷的影响,子导线在不同的风速下振动的幅值不相同,其舞动时程图极限为一个斜椭圆形。可见覆冰八分裂导线舞动过程中的次档距振动,可能会导致子导线发生碰撞,从而对特高压(ultra-high voltage,UHV)输电线路的安全运行造成危害。研究成果对特高压输电线路的舞动原理和防振的后续研究有一定的参考意义。In order to provide a reference for the galloping characteristics and anti-vibration of the ice-coated eight-bundle transmission line,the phenomenon and characteristics of the sub-span oscillation of the eight-bundle conductor were analyzed by numerical analysis,and the numerical simulation results were compared to find the movement trajectory and similarities and differences in galloping amplitude.The results show that the sub-conductors of the iced eight-bundle transmission line dance in the same direction under different wind speeds.However,due to the influence of wake interference and aerodynamic loads,the vibration amplitudes of the sub-conductors under different wind speeds are different.The limit of the diagram is an oblique ellipse.It can be seen that the sub-span oscillation during the galloping process of the iced eight-bundle conductor may cause the sub-conductor to collide,which harms the safe operation of the ultra-high voltage(UHV)transmission line.The research results have certain reference significance for the follow-up research on galloping principle and anti-vibration of UHV transmission lines.

关 键 词：覆冰八分裂导线 舞动 档内振动 数值模拟 

分 类 号：TM752[电气工程—电力系统及自动化]