Design and test verification of mooring system for OCTABUOY platform

To ensure the operational safety of the OCTABUOY platform deployed in shallow-water environments for offshore wind turbine installation, this study proposes an eight-point mooring system tailored to the platform’s unique octagonal pontoon configuration. The designed mooring system exhibits high overall stiffness under combined ocean environ-mental loads and achieves balanced load distribution among individual mooring lines, thereby effectively suppressing extreme tension peaks. A series of physical model tests were conducted to analyze the mooring tensions and motion responses of the OCTA-BUOY platform. The distributions of mooring loads and motion modes were obtained under varying wave periods, wind speeds, current velocities, wind–wave incidence angles, and draft conditions, confirming the safety of the eight-point mooring system across all operating states. Additionally, the study evaluates the increased tension in the remaining mooring lines after a single-line failure and assesses the associated risk states. The pro-posed mooring configuration and validation methodology provide essential safety as-surance for the OCTABUOY platform during offshore wind turbine installation and offer critical references for evaluating whether specific sea states and tidal conditions are suita-ble for safe operations.为保障部署于浅水环境、用于海上风电安装的OCTABUOY平台的作业安全，本研究针对该平台独特的八角形浮筒构型，提出了一款八点系泊系统。所设计的系泊系统在复合海洋环境载荷下具备较高整体刚度，且可实现各系泊缆绳间的载荷均匀分布，从而有效抑制极端张力峰值。本研究开展了一系列物理模型试验，以分析OCTABUOY平台的系泊张力与运动响应。通过改变波浪周期、风速、流速、风浪入射角及吃水条件，获取了系泊载荷与运动模式的分布特征，验证了八点系泊系统在全运行工况下的安全性。此外，本研究还评估了单根系泊缆失效后剩余缆绳的张力增量，并分析了相关风险状态。所提出的系泊构型与验证方法，可为OCTABUOY平台在海上风电安装过程中提供关键安全保障，同时为评估特定海况与潮汐条件是否适宜安全作业提供重要参考依据。