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深海风力机因其役环境的复杂性,在产品开发阶段需要对各种载荷条件下的整机结构特性进行分析,并开发相应的分析或仿真系统。在已有研究基础上,开发了深海漂浮式风力机整机仿真系统,该系统主要由风力机气动模块、漂浮式海洋平台水动力模块和整机结构动力学模块三部分组成。其仿真算法核心为采用动态子结构法将水动力载荷与气动载荷同时加载到整机结构动力学模块界面上,实现气动和水动耦合条件下结构动力学特性的求解。为检验仿真模型的可信性,利用该系统对NREL基准的5MW漂浮式风力机进行结构动力学仿真分析。结果表明该模型可以求解气动和水动耦合条件下结构动力学问题。同时,研究表明深海漂浮式风力机在风与海浪载荷条件下,其漂浮式平台会产生相应的摇荡运动,气动与水动力载荷相互耦合对结构动力响应及功率波动有着显著影响。
Due to the complexity of its service environment, deep-sea wind turbines need to analyze the structural characteristics of the whole machine under various load conditions in the product development stage and develop corresponding analysis or simulation systems. Based on the existing research, a deep sea floating wind turbine machine simulation system is developed. The system mainly consists of three parts: the wind turbine pneumatic module, the floating marine platform hydrodynamic module and the whole machine structural dynamics module. The core of the simulation algorithm is to use the dynamic substructure method to load the hydrodynamic loads and the aerodynamic loads simultaneously to the structural dynamics module interface of the whole machine to solve the structural dynamic characteristics under the aerodynamic and hydrodynamic coupling conditions. In order to verify the credibility of the simulation model, this system was used to simulate the structural dynamics of NREL 5MW floating wind turbine. The results show that this model can solve the structural dynamics problem under the condition of aerodynamic and hydrodynamic coupling. At the same time, the research shows that the floating platform of the deep-sea floating wind turbine will generate corresponding oscillating motion under the wind and ocean wave loading conditions. The coupling of aerodynamic and hydrodynamic loads has a significant impact on the structural dynamic response and power fluctuation.