To be competitive in offshore wind energy production, safe and economical foundation design is essential. In recent years, tripod suction bucket foundations have been considered as an alternative to conventional foundations owing to their unique features suitable for offshore construction environments, economic installation, and high overturning resistance. However, it is difficult to accurately predict the behavior of tripod foundation because the load acting on the tripod is complex in HVM (i.e., horizontal, vertical, and moment loads) and the response varies depending on the size and direction of the load. Moreover, it is harder to analyze because the effects of cyclic loads must be considered in an offshore environment. This study, therefore, has investigated the behavior of the tripod suction bucket foundation under cyclic loadings. To analyze the complex responses of the tripod foundation in detail, the overall behavior of the tripod foundation system was observed based on the compression–pullout behavior of a single bucket. Moment–rotation responses, the cyclic stiffness, and permanent displacements of the tripod foundation are evaluated by analyzing the vertical behavior of the single‐bucket foundations as well as the rotational behavior of the tripod foundation. A number of centrifuge model tests were carried out with different loading conditions (i.e., loading amplitudes and directions). It was confirmed that the cyclic behavior of the tripod bucket foundation is significantly affected by loading amplitudes and directions. Furthermore, this study emphasized the importance of considering load characteristics when designing the tripod foundation.

中文翻译：

---

离心机模型试验研究支撑海上风力机的三脚架吸水桶基础系统的循环行为。

为了在海上风能生产中具有竞争力，安全经济的基础设计必不可少。近年来，由于三脚架吸斗式地基具有适用于海上施工环境，经济安装和高抗倾覆性的独特功能，因此被认为是传统地基的替代产品。但是，由于在HVM中作用在三脚架上的负载（即水平，垂直和力矩负载）很复杂，并且响应取决于负载的大小和方向而变化，因此很难准确地预测三脚架基础的行为。而且，由于必须在海上环境中考虑周期性载荷的影响，因此更难分析。因此，本研究调查了三脚架吸水桶基础在周期性载荷下的性能。为了详细分析三脚架基础的复杂响应，基于单个铲斗的压缩拉出行为，观察了三脚架基础系统的整体性能。通过分析单桶基础的竖向行为以及三脚架基础的旋转行为，评估了三脚架基础的力矩-旋转响应，循环刚度和永久位移。在不同的加载条件（即加载幅度和方向）下进行了许多离心机模型测试。可以确定的是，三脚架铲斗基础的循环特性会受到载荷振幅和方向的显着影响。此外，这项研究强调了在设计三脚架基础时考虑载荷特性的重要性。