输电线覆冰舞动的简化分析方法  

SIMPLIFIED ANALYSIS METHOD OF ICE-COATED TRANSMISSION CONDUCTORS GALLOPING

作　　者：李黎[1,2] 曹化锦[1,2] 肖鹏[1,2] 夏正春[3] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]华中科技大学控制结构湖北省重点实验室,湖北武汉430074 [3]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《工程力学》2011年第A02期152-156,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(50878093)

摘　　要：覆冰导线舞动对大跨越输电线路造成严重危害,目前对输电线舞动的研究多采用复杂的数值模拟方法。该文利用数值风洞技术对覆冰导线的气动特性进行了数值模拟,采用有限元程序ANSYS建立弹簧-输电线模型进行静力分析,在LSDYNA中采用非线性粘性阻尼器单元来模拟覆冰导线的气动特性,进行显式有限元计算,提出了输电线舞动研究的简化分析方法并对其准确性进行了验证。最后,采用简化方法对500kV海门到汕头榕江大跨越工程进行了架空输电线的舞动计算。Ice-coated transmission conductor galloping causes serious harmful to power transmission towers, the present research on galloping mostly adopts complex numerical simulation. The numerical wind tunnel technology based on CFD numerical simulation was used to study the aerodynamic characteristics of ice-coated transmission conductors. A springtransmission line model, in which the spring was used to copy the actions of the tower to transmission conductors, was established and a nonlinear viscosity damper model was used to simulate the aerodynamic characteristics of ice-coated transmission conductors, based on ANSYS/LS-DYNA. The explicit finite element simulation method was used and galloping analysis was carried out. Based on the proposed model, a simplified calculation method of transmission conductors galloping was proposed and verified. And also based on the Haimen-Shantou 500kV long-span power transmission tower line project, the simplified calculation of transmission conductors galloping was performed.

关 键 词：输电线 舞动 简化分析 非线性粘性阻尼器 显式有限元 

分 类 号：TM726.3[电气工程—电力系统及自动化]