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运转工况下风电塔抗震分析
引用本文:戴靠山,赵志,易正翔,盛超.运转工况下风电塔抗震分析[J].北京科技大学学报,2017,39(10).
作者姓名:戴靠山  赵志  易正翔  盛超
作者单位:1. 同济大学土木工程防灾国家重点实验室,上海 200092;能源工程安全与灾害力学教育部重点实验室(四川大学),成都 610065;2. 同济大学土木工程防灾国家重点实验室,上海,200092;3. 加州大学洛杉矶分校土木与环境工程学院,洛杉矶 90025
基金项目:国家自然科学基金资助项目,上海市国际科技合作基金资助项目,能源工程安全与灾害力学教育部重点实验室开放基金资助项目
摘    要:为了研究运转工况下风电塔的地震响应及倒塔模式,使用风电塔设计软件FAST建立风电塔模型,比较停机和运转不同工况下的结构响应,并在运转工况下通过改变地震动输入方向研究不同风震组合角对结构响应的影响,得到最不利工况;使用ABAQUS建立风电塔的精细化有限元模型,将FAST计算的塔顶风荷载导入ABAQUS开展分析计算.将基于叶素理论计算的塔顶荷载与FAST计算结果进行对比,并进一步将弹性阶段ABAQUS与FAST模拟的塔顶位移进行对比,校验分析方法的合理性.利用ABAQUS模型将地震动调幅,开展倒塔模拟.研究结果表明运转工况下最不利风震组合角是90°,强震下塑性铰在塔身下部出现并向中上部发展,最终该风电塔在中上部发生破坏.

关 键 词:风电塔  风震组合  抗震分析  运转工况  倒塔模拟

Seismic analyses of wind turbine tower under operational conditions
DAI Kao-shan,ZHAO Zhi,YI Zheng-xiang,SHENG Chao.Seismic analyses of wind turbine tower under operational conditions[J].Journal of University of Science and Technology Beijing,2017,39(10).
Authors:DAI Kao-shan  ZHAO Zhi  YI Zheng-xiang  SHENG Chao
Abstract:In order to study seismic responses and collapse mode of a wind turbine tower under operational conditions, a wind tur-bine tower model was developed by the wind turbine design software FAST. The structural responses in idle condition and operational conditions were calculated and compared. The influences of different angles between wind and earthquake inputs on structural respon-ses were investigated. A detailed finite element model of the same tower was developed with ABAQUS. Wind load effects induced by the blades were calculated by FAST simulations and were verified with the results estimated through the blade element theory. Elastic analysis results from the FAST model and the ABAQUS model were also compared for verification purposes. Tower collapse simulations were conducted under earthquake excitations using the ABAQUS model. Study results show that the case with a 90° angle between the wind and earthquake inputs is the most dangerous scenario that could occur for tower dynamic responses. Collapse simulations indicate that the plastic hinges are initiated from the bottom part of the tubular tower wall; later, they develop into the upper part of the struc-ture too. The tower fails at the middle-upper part of the tower wall.
Keywords:wind turbine tower  wind-earthquake combination  seismic analysis  operational condition  collapse simulation
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