摘要
以正在建设中的世界第一高 3 46 5m的输电塔———江阴大跨越为工程背景 ,建立了考虑输电线、绝缘子和塔架耦合的两塔三段线分析模型 ,用非线性有限元分析方法对大跨越塔线体系进行了风振响应分析 ,并进行了气动弹性模型风洞试验。通过理论计算和试验研究 ,指出输电线对塔架的自振频率影响较小 ,而结构体系风振响应分析则应考虑塔线耦合影响 。
Based on the engineering of the tallest transmission towers in the world, which is a part of the Jiangyin 500kV long span transmission line system under construction over the Changjiang River,an accurate spatial finite element model composed of two towers and three spans transmission lines is established considering the coupling effect among the transmission towers, insulators and transmission lines. Then wind induced vibration response is calculated with the nonlinear finite element method and the wind tunnel test of the system is also made. Through analytical and experimental studies, it is pointed out that the natural frequencies of towers and lines can be separately computed, while wind induced vibration response of long span transmission line system must be analyzed in consideration of coupling effect between towers and lines.The analysis method and analysis conclusions can be used for reference to practical engineering.
出处
《建筑结构》
CSCD
北大核心
2004年第7期25-28,10,共5页
Building Structure
基金
国家自然科学基金资助项目 ( 5 0 0 780 40 )
关键词
大跨越输电塔线体系
动力特性
风振响应
气动弹性模型
风洞试验
long span transmission line system
aeroelastic model
wind tunnel experiment
dynamic behavior
wind induced vibration response
