PROPABILISTIC FATIGUE ANALYSIS OF OFFSHORE WIND TURBINES
PROPABILISTIC FATIGUE ANALYSIS OF OFFSHORE WIND TURBINES
复制标题
海上风力发电机的概率疲劳分析
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
D. Vamvatsikos
中科院分区：
文献类型：
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作者：
Dimitrios V. Bilionis;D. Vamvatsikos
风力涡轮机是利用风能生产能源的可持续且有效的解决方案。海上风力涡轮机尤其受到人们的特别关注。然而，它们的设计提出了巨大的挑战，因为海上结构要承受风浪联合动态载荷，这是安装地点的特征。本文的目的是提供一个单桩设计标准海上风力发电机泥线（基础）横截面疲劳寿命评估的案例研究，在概率框架下并假设检查横截面的厚度作为设计变量。对希腊爱琴海的两个潜在建设地点进行了考察。采用概率方法来根据两个感兴趣地点的风学数据确定疲劳寿命。其基础是对风（速度）和波浪（高度、周期）特征的广泛蒙特卡罗模拟。结果显示疲劳寿命对当地风浪条件、横截面几何形状（即基础桩的厚度）和焊接连接细节的依赖性。总而言之，爱琴海的条件更加有利，可以使用更简单的连接细节和更小的基础桩横截面厚度，但仍然具有可接受的性能。
Wind Turbines constitute a sustainable and effective solution for the production of energy using wind power. Offshore wind turbines especially are becoming of special interest. However, their design poses great challenges, since an offshore structure is subject to combined wind and wave dynamic loading that is characteristic of the site of installation. The purpose of this paper is to provide a case study of fatigue life assessment for the cross-section at mudline (foundation) of a standard offshore wind turbine with a monopile design, under a probabilistic framework and assuming the thickness of the examined cross-section as the design variable. Two potential sites of construction in the Aegean Sea of Greece were examined. A probabilistic approach was employed in order to determine the fatigue life based on anemological data at each of the two sites of interest. At its basis is an extensive Monte Carlo simulation of wind (velocity) and wave (height, period) characteristics. The results show the dependence of fatigue life on the local wind and wave conditions, the cross-section geometry (i.e. the thickness of the foundation’s pile) and the welded connection detail. All in all, the more benign conditions in the Aegean allow simpler connection details and smaller thickness of foundation pile’s cross-section to still have acceptable performance.