东南大学学报（英文版）2023，Vol.39Issue(4)：333-339,7.DOI:10.3969/j.issn.1003-7985.2023.04.002
下击暴流作用下悬浮抱杆的风振响应分析
Analysis of wind vibration response of suspended derrick under downburst
摘要
Abstract
The vibration response of a suspended derrick was analyzed using the finite element method to accurately estimate its safety performance in a transmission structure under a downburst.Based on the deterministic-random hybrid model,the entire process wind speed of the moving downburst is simulated by a modified stochastic wave-based spectral representation method.Meanwhile,the vibration response of the suspended derrick under a downburst was obtained.The results show that the suspended derrick swings considerably under a moving downburst,and the main structure bends with a displacement amplitude of approximately 1.388 m.Moreover,the maximum tension experienced by the outer tie line and supporting rope are 45.11 and 47.06 kN,respectively.The maximum displacement and tensile force values are observed when the center of the downburst is approximately 1 100 m away from the suspended derrick.This indicates that the suspended derrick is prone to produce a large wind vibration response under the downburst,which will adversely affect the construction safety of the transmission tower.Therefore,performing relevant reinforcement and vibration reduction control measures is essential.关键词
移动下击暴流/悬浮抱杆/确定性-随机混合模型/有限元模拟Key words
moving downburst/suspended derrick/deterministic-random hybrid model/finite element simulation分类
建筑与水利引用本文复制引用
林禹轩,徐梓栋,王浩,刘耀东,张寒,赵恺雍..下击暴流作用下悬浮抱杆的风振响应分析[J].东南大学学报（英文版）,2023,39(4):333-339,7.基金项目
The National Natural Science Foundation of China(No.52338011,51978155,52208481),China Postdoctoral Science Foundation(No.2023M730581). （No.52338011,51978155,52208481）
