| 考虑土―结构相互作用的运转状态风电塔抗震分析 |
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| 作者姓名： | 戴靠山 毛振西 张玉林 赵志 梁发云 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室,上海200092;四川大学能源工程安全与灾害力学教育部重点实验室, 成都610065;同济大学土木工程防灾国家重点实验室,上海,200092 |
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| 基金项目： | 上海市国际科技合作基金项目(16510711300)能源工程安全与灾害力学教育部重点实验室开放基金(EES201603)科技部"政府间国际科技创新合作"重点专项资助项目(2016YFE0105600) |
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| 摘 要： | 针对某陆上风电场1.5 MW风电塔结构,建立了"塔筒-基础-地基"整体三维精细有限元模型,研究土-结构相互作用对风机运转状态下风电塔结构地震动力响应的影响规律.在风机运转状态下,使用FAST程序把风速时程转化为风荷载时程输入模型,并使用EERA程序进行土层地震反应分析得到模型土层底部的地震波,作为地震激励进行输入,对风电塔进行模态分析并计算风电塔地震动力响应.研究表明,考虑土-结构相互作用效应会引起风电塔体系自振频率降低,并显著增加风电塔的结构动力响应.
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| 关 键 词： | 风电塔 地震响应 土—结构相互作用 有限元分析 |
| 收稿时间： | 2016-10-18 |
Seismic response analyses of a wind turbine under operating conditions considering soil-structure interaction |
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| Affiliation: | 1) State Key Laboratory of Disaster Reduction in Civil Engineering and College of Civil Engineering, Tongji University, Shanghai 200092, China2) Key Laboratory of Energy Engineering Safety and Disaster Mechanics, Ministry of Education, Sichuan University, Chengdu 610065, China |
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| Abstract: | A detailed three-dimensional finite element model including soil-structure interaction was developed for a 1.5 MW onshore wind turbine. A comparative study was performed to investigate the soil-structure interaction (SSI) effects on the seismic responses of the wind turbine under operating conditions. Wind speed time histories were converted to wind load time histories under the operating condition by using the FAST program. Simulation analysis was conducted using the EERA program to derive earthquake excitations at the base of the soil model. Then modal analyses and seismic response analyses were performed. The results show that soil-structure interaction has significant influences on the dynamic characteristics of the wind turbine tower, which results in amplification of the structural responses. |
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