Lateral and Axial Capacity of Monopiles for Offshore Wind Turbines
Lateral and Axial Capacity of Monopiles for Offshore Wind Turbines
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DOI：
10.1007/s40098-013-0056-4
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发表时间：
2013-03
影响因子：
1.4
通讯作者：
A. Haiderali;U. Cilingir;G. Madabhushi
中科院分区：
文献类型：
--
作者：
A. Haiderali;U. Cilingir;G. Madabhushi
海上风能在全球范围内具有巨大的潜力，可以产生越来越多的清洁、可再生能源。单桩基础被认为是可行的，以支持较大的海上风力涡轮机在浅至中深水域。本文采用三维有限元分析方法，研究了不同抗剪强度和刚度的不排水粘土中单桩的侧向和轴向响应。在分析中使用了位于水深30米的海上风电场的轴向和横向载荷组合。数值推导的单桩轴向能力将与文献中使用既定方法计算的结果进行比较。此外，还将确定极限状态下的横向单桩承载力，并与可使用极限状态下的横向单桩承载力进行比较。通过参数化研究可以发现，除了与单桩轴向承载力接近的极高轴向载荷外，轴向载荷的变化对单桩的极限侧向承载力和侧向位移没有显著影响。
Offshore wind has enormous worldwide potential to generate increasing amounts of clean, renewable energy. Monopile foundations are considered to be viable in supporting larger offshore wind turbines in shallow to medium depth waters. In this paper, the lateral and axial response of monopiles installed in undrained clays of varying shear strength and stiffness is investigated using three-dimensional finite element analysis. A combination of axial and lateral loads expected at an offshore wind farm located in a water depth of 30 m has been used in the analysis. Numerically derived monopile axial capacities will be compared to those calculated using an established method in the literature. In addition, the lateral monopile capacity will be determined at ultimate limit state and compared to that at the serviceability limit state. Through a parametric study, it will be shown that with the exception of extremely high axial loads that border on monopile axial capacities, variation in axial loads does not have a significant effect on the ultimate lateral capacity and lateral displacement of monopiles.