风荷载作用下大跨越输电塔动力响应分析  

Dynamic Response Analysis of Large Span Transmission Tower under Wind Load

作　　者：刘海锐 陈池[1] 段洪波[1] 王杭杭 LIU Hai-rui;CHEN Chi;DUAN Hong-bo;WANG Hang-hang(College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学土木与建筑学院,宜昌443002

出　　处：《价值工程》2018年第13期114-117,共4页Value Engineering

摘　　要：在ANSYS软件中建立大跨越输电塔有限元模型,对该结构模型进行简化分段,基于线性滤波法在MATLAB软件中模拟输电塔各段中心节点处的脉动风速时程,将其与平均风速叠加得到各段中心节点处的风速时程,根据风荷载与风速的关系,得到作用在各段中心节点上的风荷载时程,采用ANSYS软件中的时程分析方法计算输电塔在风荷载作用下的风振响应。结果表明:在风荷载作用下,随着高度的增加,输电塔动力响应的位移均值及加速度均方根逐渐增大。A finite element model of a large span transmission tower is established in ANSYS software,and the structural model is simplified and segmented.The fluctuating wind speed time history at the central node of each segment is simulated in MATLAB software based on linear filtering method,and overlaid with the average wind speed so that the wind speed time history at the central node of each segment is obtained.According to the relationship between wind load and wind speed,the wind load time history acting on the central node of each segment is obtained.The time history analysis method in ANSYS software is used to calculate the wind-induced response under the wind load of the transmission tower.The results show that under the action of wind load,the average value of displacement and the root mean square of acceleration of transmission tower dynamic response increase gradually with the increase of the height.

关 键 词：输电塔 风荷载 线性滤波法 时程分析 风振响应 

分 类 号：TB532[理学—物理]