Investigation on offshore wind turbine with an innovative hybrid monopile foundation: An experimental based study
Investigation on offshore wind turbine with an innovative hybrid monopile foundation: An experimental based study
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DOI：
10.1016/j.renene.2018.07.127
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发表时间：
2019-03
期刊：
影响因子：
8.7
通讯作者：
Xuefei Wang;X. Zeng;Xinyao Li;Jiale Li
中科院分区：
文献类型：
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作者：
Xuefei Wang;X. Zeng;Xinyao Li;Jiale Li
海上风电机组的支撑结构在维护结构稳定性和降低初始造价方面起着重要作用。提出了一种用于OWT的创新的混合型单桩基础。该概念利用已有的知识来解决新问题，具有更广泛的适应性。进行了一系列的离心机试验，研究了该混合地基系统在极端和使用条件下的工作性能。为了进行对比，对原单桩基础和纯车轮基础的单桩基础进行了试验，并考虑了两种粘土剖面。试验结果表明，与传统基础相比，混合单桩基础具有更大的极限承载力。提出了两种分析方法来估算这一创新设计的极限承载力，并通过离心机试验对结果进行了校核。在使用条件下，混合独桩基础表现出较强的循环阻力。总结了循环响应的影响因素。提出了估算混合独桩基础累积侧向位移的解析解。根据离心机试验结果，提出了一个退化因子。本研究旨在丰富对创新基础概念的理解，为实际应用提供设计参考。
The support structure for offshore wind turbines (OWTs) plays significant roles in maintaining the structural stability and reducing the initial cost. An innovative hybrid monopile foundation for OWTs is proposed. The concept has a wider adaptability by using established knowledge to solve for new problems. A series of centrifuge tests is performed to investigate the behavior of this hybrid foundation system in extreme and service conditions. OWTs with the original monopile foundation as well as the wheel-only foundations are tested for comparisons, and two clay profiles are considered. The test results show that the hybrid monopile foundation provides larger ultimate bearing capacities compared to the traditional foundations. Two analytical methods are proposed to estimate the ultimate bearing capacity of this innovative design, and the results are calibrated by the centrifuge tests. In service conditions, the hybrid monopile foundation shows stronger cyclic resistances. Influence factors of the cyclic responses are summarized. An analytical solution is put forward to estimate the accumulated lateral displacement of the hybrid monopile foundation. A degradation factor is suggested based on the results of the centrifuge tests. The study aims to enrich the understanding of the innovative foundation concept and to provide design references for practical applications.