沿海强风区高柔铁塔偶联动力特性分析

Analysis on Coupling Dynamic Properties of High-rise Flexible Transmission Tower in Coastal Strong Wind Area

论文研究了沿海强风区高柔铁塔的塔线偶联动力特性问题。首先建立了输电铁塔的力学模型,然后基于有限元理论建立了塔线体系有限元分析模型。以中国南部沿海某大跨度输电铁塔为工程背景,研究了有无输电线时铁塔动力特性的差异。研究表明:输电转角塔的塔线偶联效应较为显著,导线对铁塔自振频率存在一定程度的影响。

The dynamic properties of coupled transmission tower-line system in coastal strong wind area are actively investigated in this study.The mechanical model of the single tower is first established and then the model of the transmission tower-line system is also constructed.A real transmission tower-line system constructed in southern coastal areas in China is taken as the example to investigate the difference of dynamic properties with and without transmission lines.The observations indicate that the coupling effects between tower and lines are very clear and the lines may affect the natural frequencies of tower to some extent.