基于脉动风影响的输电线路舞动分析

Galloping Analysis of Transmission Lines Based on the Influence of Fluctuating Wind

为研究脉动风影响下的输电线舞动特性,运用谐波合成法分析得到平均风谱与脉动风谱来模拟大气自然风,并根据导线风攻角及几何特性确定覆冰导线风荷载分布情况。本文采用有限元分析软件建立2b2-ZMK-72型铁塔"两塔三线"模型,施加脉动风作用下的风荷载,并计算分析导线舞动情况。结果表明,该塔线体系中,导线发生舞动时,破坏主要以疲劳破坏为主,舞动频率达到0.35Hz和0.753Hz时对导线破坏最大。

For the transmission line of wind under the influence of the characteristics of galloping, Using the harmonic synthesis method of average wind spectrum and fluctuating wind spectrum to simulate atmospheric natural wind, And determine the wind load distribution of ice coating on conductor wire according to the geometric characteristics and wind at- tack angle. This paper uses finite element analysis software to establish the 2b2 -ZMK- 72 type tower ＂two towers and three lines＂ model, Applying wind load under pulsating wind, Calculation and analysis of wire galloping. The results showed that, In the tower line system, when the conductor galloping, the fatigue failure is the main failure, When the galloping frequency reaches 0. 35Hz and 0. 753Hz,the wire is the most destructive.