Wind Turbine Seismic Load Analysis Based on Numerical Calculation
Wind Turbine Seismic Load Analysis Based on Numerical Calculation
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DOI：
10.5545/sv-jme.2014.1646
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发表时间：
2014-10
影响因子：
1.7
通讯作者：
Xin Jin;H. Liu;Wenbin Ju
中科院分区：
文献类型：
--
作者：
Xin Jin;H. Liu;Wenbin Ju
大型风力涡轮机在欧洲已经普遍使用。由于该地区地震相对较少，对风电涡轮机规格的地震影响考虑不足，但目前在地震多发地区建设的风电场较多，在风电涡轮机设计中，地震影响不容忽视。基于多体系统动力学理论，考虑土-结构相互作用，建立了叶片-机舱-塔架-基础耦合模型，研究了风力发电机组在地震作用下的承载情况。根据多体系统动力学的基本理论，将风力涡轮机叶片-塔架系统由一系列连续的离散单元组成，塔架系统中的土-结构相互作用是通过设置在地基与土体交界面上的弹簧和阻尼实现的;机舱简化为刚体模型。基于欧洲规范8地震载荷谱，对一台涡轮机在地震作用下的动力响应进行了分析，并对地震载荷进行了比较。研究结果可为地震多发区风力发电机组关键部件的设计和控制策略提供参考。
Large-scale wind turbines have come into common use in Europe. Because violent earthquakes are relatively rare there, insufficient consideration has been given to the seismic impact on the wind turbine specifications; however, at present, there are many wind farms being constructed in earthquake-prone regions, and the seismic impact cannot be ignored in wind turbine designs. Based on the multi-body system dynamic theory and taking into consideration the soil-structure interaction, this paper proposes a blade-cabin-tower-foundation coupled model in order to study the load-bearing conditions of wind turbines under seismic impact. According to the basic theory of multi-body system dynamics, the wind turbine blade and tower system comprises a series of continuous discrete units, while soil-structure interaction in the tower system is realized through the spring and damping set on the interface between the foundation and the soil body; the cabin is simplified as a rigid model. Based on the Eurocode 8 earthquake load spectrum, the dynamic response of a wind turbine working under seismic impact is analysed, and the seismic load is compared. Results of the study can serve as references for designing key parts and control strategies of wind turbines for earthquake-prone regions.