覆冰导线舞动的非线性数值仿真研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (8) : 107-111.

论文

覆冰导线舞动的非线性数值仿真研究

李黎1,2; 陈元坤1,2; 夏正春3; 曹化锦1,2

作者信息 +

Nonlinear Numerical Simulation Study of Iced Conductor Galloping

LI Li1,2; CHEN Yuan-kun1,2; XIA Zheng-chun3; CAO Hua-jin1,2

Author information +

文章历史 +

摘要

导线的覆冰舞动严重威胁特高压输电线路的安全运行。本文利用能考虑扭转自由度的的两节点索单元，并结合分裂导
线等效为单根导线计算方法，建立了连续多档分裂导线舞动分析的有限元模型。同时采用计算流体动力学方法对覆冰导线气
动特性进行数值模拟，获得了覆冰导线在各风攻角下的气动力系数。基于连续多档导线的有限元模型与气动力系数-风攻角
曲线，利用龙格-库塔法对覆冰导线舞动进行非线性数值求解，并自编了FORTRAN程序。通过对汉江大跨越工程覆冰导线的
舞动数值仿真分析表明，该方法与程序是可行的，且具有较高的计算效率；并利用该方法研究了风速与初始攻角对舞动的影
响，为进一步研究输电线的舞动提供基础。

Abstract

The galloping of iced conductors is a serious threat to the safety of the transmission lines. A two-node
bar element having three translational and a torsional degree-of-freedom at each node was employed to model the
conductor. Combined with the method of the bundle conductor equivalence to a single conductor, the finite
element model of multi-span transmission line for galloping analysis was established. In addition, the
aerodynamic coefficient of iced conductor under different wind attack angle was obtained through computational
fluid dynamics method. On the basis of the finite element model and aerodynamic coefficient curve, the
Runge-Kutta method was applied to carried out nonlinear numerical simulation of iced conductor galloping and
the FORTRAN program was compiled. The galloping of the long-span transmission line crossing Hanjiang River
was analyzed. The results indicate that the presented method and program are reliable and efficient. Meanwhile,
the impact of the wind velocity and initial attack angle on galloping were investigated with the program. They can
provide references for the further study of galloping.

导出引用

李黎; 陈元坤;夏正春;曹化锦;. 覆冰导线舞动的非线性数值仿真研究[J]. 振动与冲击, 2011, 30(8): 107-111

LI Li;CHEN Yuan-kun;XIA Zheng-chun;CAO Hua-jin;. Nonlinear Numerical Simulation Study of Iced Conductor Galloping[J]. Journal of Vibration and Shock, 2011, 30(8): 107-111