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Response Characteristics of the DeepCwind Floating Wind Turbine Moored by a Single-Point Mooring System

机译：单点系泊系统系泊的DeepCwind浮动风轮机的响应特性

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In recent years, the SPM (Single-Point Mooring) concept has been widely employed in several branches of the naval architecture and marine engineering field, such as FPSOs (Floating Production, Storage and Offloading units), offshore oil rigs, etc., but not yet popular in the offshore wind energy. To investigate the response characteristics of an SPM-moored FWT (Floating Wind Turbine), in the present work, we perform a numerical study on the DeepCwind semisubmersible wind turbine, using the state-of-the-art open-source tool FAST. The free-decay test results show that the SPM layout affects the natural periods of the wind turbine in rotational modes, as well as the mooring stiffness of the diagonal rotational and crossing rotational-translational terms, especially in relation to the yaw mode. Comparisons of the RAOs (Response Amplitude Operators) elucidate that the presence of wind influences significantly the sway, roll and yaw motions of the SPM layout. Finally, the weathervane test shows that an asymmetry exists in the free-yaw motion response when the semisubmersible wind turbine is moored by an SPM system.
机译：近年来，SPM（单点系泊）概念已在海军建筑和海洋工程领域的多个分支中得到广泛采用，例如FPSO（浮式生产，存储和卸油装置），海上石油钻井平台等，但是，在海上风能中尚未流行。为了研究SPM系泊的FWT（浮动风力发电机）的响应特性，在当前工作中，我们使用最新的开源工具FAST对DeepCwind半潜式风力发电机进行了数值研究。自由衰减测试结果表明，SPM布局会影响旋转模式下风力涡轮机的自然周期，以及对角旋转和交叉旋转-平移项的系泊刚度，尤其是相对于偏航模式。通过比较RAO（响应幅度运算符）可以看出，风的存在会显着影响SPM布局的摇摆，滚动和偏航运动。最后，风向标测试表明，当半潜式风力涡轮机由SPM系统系泊时，自由偏航运动响应中存在不对称性。

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