干字形输电塔考虑塔线耦连效应的动力特性分析

Dynamic Property Analysis on Gan Typed Transmission Tower with Consideration of Coupling Even Effect of Tower Line

研究了干字型输电塔考虑塔线耦连效应的动力特性问题。首先采用有限元理论建立输电塔的分析模型,进一步采用有限元分析软件ANSYS形成输电塔-导线体系的有限元模型。通过数值模拟计算研究了某实际大跨度转角输电塔的动力效应,发现两侧相邻导线对该输电转角塔的动力性能存在一定程度的影响。由于导线的附加质量和刚度效应作用,该输电塔的前2阶自振频率减小了约10%。

This paper studies dynamic property of Gan typed transmission tower with consideration of coupling even effect of tower line. It establishes analysis model of transmission tower by adopting finite element theory and forms finite element model of transmission tower-conductor system by using finite element analysis software ANSYS. It studies dynamic effect of one longspan angle transmission tower by means of numerical simulation calculation and finds out that the adjacent conduc- tors on two sides will affect dynamic performance of this angle transmission tower and for reasons of additional quality and stiffness effect of the conductor, natural frequency of vibration of the first two ranks reduces about 10%.