基于模态分析的酒杯型输电塔线耦联体系基频近似计算  

Approximate Calculation of Fundamental Frequency of Cup Type Transmission Tower Line Coupling System Based on Modal Analysis

作　　者：吴秀峰[1] 赵可[1] 李红芳[1] 卢兴[1] 张松鹤[1] 

机构地区：[1]辽宁工程技术大学建筑工程学院,阜新123000

出　　处：《世界科技研究与发展》2015年第6期684-687,704,共5页World Sci-Tech R&D

基　　金：辽宁省教育厅科学研究一般项目(L2015222)资助

摘　　要：针对《建筑结构荷载规范》和电力部门给出的输电塔架基频计算方法各不相同问题,基于ANSYS软件建立不同高度的酒杯型输电塔架有限元模型,通过模态分析得出结构基频并与规范计算结果比对。结果表明:利用梁杆组合单元建立的输电塔架模型参数与实际较吻合;考虑导线与塔架间的弱耦合效应,进而利用此模型建立输电塔线耦联体系模型进行分析,得出了适合于实际工作状态的酒杯型输电塔线耦联体系基频近似计算公式。The calculation method of transmission tower fundamental frequency varies in ＂ Electrical specification＂ and ＂ Load code for the design of building structures＂ , so a modal analysis on different height cup type transmission tower finite element models was performed. The tower fundamental frequency of FEM models were established and analyzed. It showed that the result of transmission tower model parameters of beam-rod element was close to actual compared with the result of standard calculation. So transmission tower line coupling system was established using beam-rod element, meanwhile, considering the weak coupling effect between wire and tower. The fundamental frequency approximation formula of cup type transmission tower line coupling system was deduced which can be used in actual working condition.

关 键 词：输电塔线耦联体系 有限元法 最小二乘法拟合 模态分析 结构基频 

分 类 号：TM75[电气工程—电力系统及自动化] TU311.4[建筑科学—结构工程]