覆冰导线风致振动的数值模拟  

Numerical Simulation of Wind-induced Vibration for Iced Conductors

作　　者：叶文娟[1] 周焕林[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥市230009

出　　处：《电力建设》2012年第6期47-49,共3页Electric Power Construction

摘　　要：基于导线舞动的空气动力特性,依据流体动力学原理对覆冰导线绕流模型的流场进行了分析,得出不同风速、攻角下的空气动力系数,并探讨了风速、攻角等对舞动的影响。以索单元模拟输电导线,建立覆冰导线舞动的力学模型,采用Ansys软件对覆冰导线舞动进行模态分析,根据谐波叠加法研究了覆冰导线的风振响应,得出覆冰导线模型的前6阶振型并绘制导线对应振型的位移图,可为覆冰导线的优化设计提供依据。Based on the aerodynamic characteristics of conductor galloping, the fluid field around iced conductor was analyzed by using fluid dynamics. The aerodynamic coefficients at various wind speed and attack angles were calculated through numerical simulation, and the influences of the wind speed, attack angles on conductor galloping were discussed. Besides, the cable elements were used to simulate transmission line for the mechanics model of iced conductor galloping. The iced conductor galloping was modal analyzed with the use of Ansys, and the wind-induced response of iced conductor was studied with the use of harmonic superimposing method. The first six natural frequencies and eigenvectors were obtained and the displacement response curves of some vibration mode of the line were drawn, which could provide references for the iced conductor design.

关 键 词：覆冰导线 空气动力特性 索单元 数值模拟 谐波叠加法 

分 类 号：TM75[电气工程—电力系统及自动化]