大跨越输电塔塔线耦联体系动力特性分析

采用有限元分析软件ANSYS9．0对耐张塔、跨越塔单塔的未挂线状态和工作状态进行模态分析。用Beam188单元模拟输电塔自身杆件,用Link180单元模拟导线和绝缘子,用Plane82单元建立自定义杆件截面,用Mass21单元模拟附加质量。建立塔线耦联体系,比较了其动力特性与单塔的区别,研究了跨越塔的振型频率随挡距改变的变化趋势,指出塔线耦联体系的动力特性与单塔相比有较大不同,在进行科研和设计工作时必须考虑耦联体系的工况。

Analysis on Dynamic Features of Long Span Transmission Line System

The finite element analysis software ANSYS 9.0 is used to make model analysis for wireless and working state of a strain tower and a crossing tower. The Beam188 unit is used to simulate the bar of transmission tower. The Link180 is used to simulate lead and dielectric. The Plane82 unit is used to establish user-defined bar section. The Mass21 unit is used to simulate additive mass. The transmission line system is established and the differences between its dynamic features and single tower are compared. As the changes of span, the changing trends of the frequency of crossing towers are researched. The results show that large differences exist between single tower and transmission line system, and the working state of this system should be considered for science research and design work.