In this research, a numerical investigation on the hydrodynamic response of a semisubmersible platform, developed by DeepCwind consortium, equipped with the National Renewable Energy Laboratory 5-MW reference wind turbine, and a typical 6-MW wind turbine is conducted. The main objective is to develop a numerical model validated by experimental test results of a semisubmersible platform with mooring lines made of various materials. A commercial software package is employed to model the floating platforms, and a coupled dynamic analysis is carried out on floater motions, mooring lines, and their interactions. The 5-MW numerical model is verified using experimental results of the reduced 1/50th scale semisubmersible platform model conducted by DeepCwind consortium. The results from the numerical model are also compared with FAST programme developed by the National Renewable Energy Laboratory, where an acceptable agreement is achieved to benchmark the parametric study presented herein. A semisubmersible platform with 6-MW wind turbine is designed through hydrostatic and hydrodynamic analyses, using the general arrangement, main structure, and mooring system from the verified 5-MW numerical model. A parametric study is carried out to study the influence of different parameters on the hydrodynamic response of the platform, including total mass, mooring material properties, and wave characteristics. Various mooring lines are examined with particular attention to polymer and synthetic materials to determine which is the most suitable for this platform. Results reveal that using the synthetic mooring lines due to their low Young's modulus provide better performance for the platform compared with other materials investigated in this research.

在这项研究中，对由 DeepCwind 财团开发的半潜式平台的水动力响应进行了数值研究，该平台配备了国家可再生能源实验室 5-MW 参考风力涡轮机和一个典型的 6-MW 风力涡轮机。主要目标是开发一个数值模型，该模型通过具有由各种材料制成的系泊绳索的半潜式平台的实验测试结果进行验证。使用商业软件包对浮动平台进行建模，并对浮动运动、系泊线及其相互作用进行耦合动力分析。使用由 DeepCwind 财团进行的缩小 1/50 比例半潜平台模型的实验结果验证了 5 MW 数值模型。数值模型的结果也与国家可再生能源实验室开发的 FAST 程序进行了比较，在那里实现了可接受的协议，以对这里介绍的参数研究进行基准测试。使用经验证的 5 MW 数值模型的总体布置、主体结构和系泊系统，通过流体静力学和流体动力学分析设计了一个带有 6 MW 风力涡轮机的半潜式平台。进行参数研究以研究不同参数对平台水动力响应的影响，包括总质量、系泊材料特性和波浪特性。检查各种系泊线，特别注意聚合物和合成材料，以确定哪种系泊最适合该平台。