摘要
输电铁塔是送电工程中的重要结构,其高柔特性使它对风荷载的作用尤其敏感,在结构抗风设计中合理而有效的方法是采用振动控制来减小结构的风振反应。以殴江某输电塔为工程背景,采用三角级数法模拟作用在输电塔架上的多维脉动风荷载,用有限元法以空间梁-杆-质量单元体系建立了输电塔架的三维有限元模型,对磁流变阻尼器的半主动控制策略和效果进行了详细的分析计算。在此基础上提出了一种半主动振动控制装置设计,为输电塔工程采用MR阻尼器进行减振控制设计提供借鉴意义。
Transmission tower is an important structure of power transmission engineering. Its high flexible characteristics make it particularly sensitive to wind load. The reasonable and effective method to reduce the wind vibration response of the structure is to use vibration control. Based on the Oujiang transmission tower system, the triangular series method is used to simulate the multidimensional pulsating wind load acting on the transmission tower. A 3D FEM model was established by using the beam-truss-mass system of the FEM. The semi-active control strategy and effect of MR dampers are analyzed and calculated in detail. Some valuable conclusions were gained for design of MR dampers. According to the conclusions, the design of semi-active vibration control device is proposed, which provides a reference for transmission tower with MR dampers.
作者
贺业飞
HE Yefei(Yantai Construction Surveyand Design Review Service Center,Yantai 264006,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期2021-2024,共4页
Building Structure
关键词
输电塔
风振响应
风振控制
时程分析
磁流变阻尼器
transmission tower
wind-induced vibration response
wind-induced vibration control
time history analysis
MR damper
