覆冰输电线结构及载荷对舞动的影响

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (1) : 116-120.

论文

覆冰输电线结构及载荷对舞动的影响

周坤涛1,2; 郝淑英1; 刘君1; 张琪昌3

作者信息 +

The influence of conductor structure and loads on the galloping of transmission line

ZHOU Kun-tao1; HAO Shu-ying1; LIU Jun1; ZHANG Qi-chang2

Author information +

文章历史 +

摘要

为深入研究导线结构形式对输电线路系统动力学特性影响，以及导线结构形式及气动扭转载荷对覆冰输电线路舞动规律及幅值的影响，采用ANSYS参数化设计语言编写了计算导线舞动的非线性有限元分析程序，计算得出了系统气动载荷作用下的时间历程曲线。发现：在相同的气象条件下，分裂导线的振幅明显大于单根导线，且分裂数越高，导线越容易在短时间内形成稳态的舞动，应尽量采用单根导线或减少导线分裂数；扭转气动力载荷对面内外舞动的规律及幅值影响不大，对扭转角的幅值有较大影响，因此可忽略扭转气动载荷对断线和倒塔的作用。

Abstract

For profoundly understanding the influence of conductor structure forms and aerodynamic torsion loads on the dynamic characteristics, the galloping law and amplitude of iced transmission line, a computer program based on nonlinear finite element analysis was developed by applying ANSYS parametric design language, time history curve was obtained. Result indicates that: the galloping amplitude of the bundle conductors is obviously greater than a single conductor, Time needed to come into being steady state of galloping decrease noticeably as more conductors are added ,in the same weather conditions, consequently single conductor and less numbers of conductors in bundle should be adopted as far as possible; aerodynamic torsion loads have slight influence on galloping law and amplitude for in-plane and out-of-plane galloping, but have a greater effect on the amplitude of angle of torsion, therefore the effect of the aerodynamic torsion loads on the breaking of iced transmission lines and towers can be ignored.

导出引用

周坤涛;郝淑英;刘君;张琪昌. 覆冰输电线结构及载荷对舞动的影响[J]. 振动与冲击, 2012, 31(1): 116-120

ZHOU Kun-tao;HAO Shu-ying;LIU Jun;ZHANG Qi-chang. The influence of conductor structure and loads on the galloping of transmission line[J]. Journal of Vibration and Shock, 2012, 31(1): 116-120