摘要
在边界层风洞中开展了台风风场与B类风场条件下某角钢输电塔气弹模型试验,采用谐波合成法模拟了不同高度的风速时程,在时域内进行了输电塔结构风致响应计算,对比研究了两类风场条件下的风致响应与风振系数.研究结果表明:输电塔风致加速度响应随着来流风速的增大而明显增大,台风风场条件下加速度响应更为剧烈,比B类风场条件大约20%~30%;B类风场条件下风振系数为1.59,台风风场条件下达到1.85,总体增幅达到16%;数值模拟结果与风洞试验结果较为吻合.因此,台风多发地区的输电塔设计应考虑台风高湍流引起的动力风荷载增大效应.
Wind tunnel tests on a aeroelastic model of steel angle transmission tower under typhoon wind field and terrain B wind field were carried out,and then the time series of wind velocity for different height of the transmission tower were simulated by Weighted Amplitude Wave Superposition(WAWS)method and the wind-induced responses were calculated with FEM in time domain.The comparisons of wind-induced response and wind vibration factor between typhoon wind field and terrain B wind field were conducted.The results indicate that the wind-induced acceleration responses enlarge significantly with wind velocity increase,the wind-induced acceleration response under typhoon wind field is more intensive than that under terrain B wind field,and the amplification is up to 20%~30%.The highly weighted wind vibration factor with value of 1.59 under terrain B wind field,and the value of 1.85 under typhoon wind field are found,the amplification is up to 16% in total.The results from numerical simulation are in good agreement with that from the wind tunnel tests.Therefore,the design of transmission tower in typhoon-prone areas should take the fluctuating wind load magnification effect into consideration.
作者
郑家松
翁兰溪
郑宁敏
唐自强
武奋前
蔡虬瑞
陈伏彬
ZHENG Jiasong;WENG Lanxi;ZHENG Ningmin;TANG Ziqiang;WU Fenqian;CAI Qiurui;CHEN Fubin(State Grid Fujian Electric Power Company,Fuzhou 350003,China;Powerchina Fujian Electric Power Survey&Design Institute Co Ltd,Fuzhou 350003,China;School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第5期99-106,共8页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51778072)
国网福建省电力有限公司科技项目(5213001600GW)。
关键词
输电塔
台风风场
风致响应
风振系数
风洞试验
谐波合成法
transmission tower
typhoon wind field
wind-induced response
wind vibration factor
wind tunnel test
Weighted Amplitude Wave Superposition(WAWS)
