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中文摘要：
基于凯恩方法和模态叠加法对三叶片水平轴海上浮式风电机组进行了刚柔耦合结构动力学建模和分析。首先建立浮式平台的水动力载荷模型,然后,把塔架和叶片等柔性件离散为有限个刚性单元体,并采用模态叠加法计算每一离散单元的偏速度和偏角速度,最后采用凯恩方法建立刚柔耦合结构动力学模型。以美国可再生能源实验室（NREL）海上5MW半潜式风电机组为算例,结合气动力载荷模型和水动力载荷模型对所建立的模型进行了风、浪响应计算,主要从输出功率、叶尖及塔顶振动信号的耦合特性两个方面对海、陆风电机组进行了对比。
英文摘要：
A rigid-flexible coupled structural dynamics model was established for offshore floating wind turbines with three-bladed horizontal-axis-rotor based on Kane method combined with the mode superposition method. Firstly, the hydrodynamic load model was determined. Then, the flexible members such as tower and blades of wind turbines were discretized into multiple rigid unit. Partial velocity and partial angular velocity of each discrete element were expressed by using the mode super- position method. Last, the rigid-flexible coupled structural dynamics model was derived based on a- bove work by using Kane method. The dynamic responses of the NREL 5-MW offshore baseline wind turbine were calculated using the established model along with the aerodynamic model and the hydro- dynamic model. The output power, coupled characteristics of offshore floating wind turbines were compared with onshore＇s.
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