输电塔-覆冰导线耦合体系非线性动力响应分析

为了全面准确的了解输电线路塔线耦合体系的动力特性以及覆冰导线的非线性舞动响应,建立了“三塔两线”的空间有限元模型.选用风工程界广泛应用的Davenport脉动风速谱,叠加相应位置的平均风速,模拟风速时程.运用现有的新月形覆冰计算模型,采用时程分析法分别对单塔、无覆冰塔线体系以及不同攻角下的输电塔-覆冰导线体系进行了风荷...

Non-linear analysis on dynamic response for coupled transmission tower-iced line system

In order to understand the dynamic properties of transmission tower-line coupling system and the non-linear wave-induced response of iced conductor cross-section , a three-tower and two-line finite element analysis model was built, in which the Davenport spectrum was chosen as target spectrum to simulate stochastic fluctuating wing wind, then the wind was created by adding harmonic wave and stochastic wind above. By using the existing crescent icing calculation model, single tower, tower-line without icing and icing tower-line with different attack angle were investigated based on time-history analysis method, the displacement of tower and line, and the stress of steel were analyzed simultaneously. The results indicate that icing has some effect on the displacement and stress of the transmission tower-line system, and the nonlinear-galloping of transmission tower-line coupling system is important.