Seismic analysis of wind turbines in the time domain
Seismic analysis of wind turbines in the time domain
复制标题
作者：
D. Witcher
在地震活跃地区设计和评估风力发电场的可行性时，与地震相关的风力涡轮机负荷分析显然是重要的。这种分析所采用的方法通常是基于已制定的用于评估作用于建筑物的地震荷载的编纂方法。这些方法不能很好地处理风力机结构动态运动与风荷载作用于转子叶片或风力机控制器响应的气动弹性相互作用。本文提出了一种替代方法，即在时域内进行计算。在这种情况下，风力机在紊流风荷载作用下的全气动弹性模型进一步受到与地震相对应的地面运动的激励。这种能力已经被引入到GH叶片风力涡轮机模拟包中。该软件可以用来计算风力发电机的风和地震联合载荷给定的外部条件的定义，为适当的一系列载荷情况。本文讨论了该方法，并给出了算例结果。版权所有©2004 John Wiley & Sons， Ltd
The analysis of wind turbine loading associated with earthquakes is clearly important when designing for and assessing the feasibility of wind farms in seismically active regions. The approach taken for such analysis is generally based on codified methods which have been developed for the assessment of seismic loads acting on buildings. These methods are not able to deal properly with the aeroelastic interaction of the dynamic motion of the wind turbine structure with either the wind loading acting on the rotor blades or the response of the turbine controller. This article presents an alternative approach, which is to undertake the calculation in the time domain. In this case a full aeroelastic model of the wind turbine subject to turbulent wind loading is further excited by ground motion corresponding to the earthquake. This capability has been introduced to the GH Bladed wind turbine simulation package. The software can be used to compute the combined wind and earthquake loading of a wind turbine given a definition of the external conditions for an appropriate series of load cases. This article discusses the method and presents example results. Copyright © 2004 John Wiley & Sons, Ltd.