Study on Rigid-Flexible Coupling Effects of Floating Offshore Wind Turbines
Study on Rigid-Flexible Coupling Effects of Floating Offshore Wind Turbines
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DOI：
10.1007/s13344-019-0001-0
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发表时间：
2019-03
影响因子：
1.6
通讯作者：
Jiahao Chen;Zhiqiang Hu;Ge-liang Liu;D. Wan
中科院分区：
文献类型：
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作者：
Jiahao Chen;Zhiqiang Hu;Ge-liang Liu;D. Wan
为了考虑海上漂浮式风力发电机组的刚柔耦合效应，建立了非线性刚柔耦合动力学模型。提出的非线性耦合模型考虑了高阶轴向位移，这通常是忽略了传统的线性动力学模型。随后，所提出的非线性动力学模型和线性之间的动态差异进行调查。结果表明，在所提出的非线性动力学模型中，涡轮机叶片的刚度随总运动的增大而增大，而在线性动力学模型中，叶片的刚度随总运动的增大而减小。非线性动力学模型中的叶片变形也比线性模型中的叶片变形更合理。此外，与线性模型相比，所提出的非线性模型中观察到了更明显的耦合效应。结果表明，采用非线性动力学模型的海上浮式风力发电机的气动载荷、结构载荷和整体动力响应均略小于采用线性动力学模型的海上浮式风力发电机。综上所述，与传统的线性动力学模型相比，本文提出的非线性耦合动力学模型是一种考虑了海上漂浮式风力发电机组刚柔耦合效应的高阶动力学模型，雅阁更符合工程实际。
In order to account for rigid-flexible coupling effects of floating offshore wind turbines, a nonlinear rigid-flexible coupled dynamic model is proposed in this paper. The proposed nonlinear coupled model takes the higher-order axial displacements into account, which are usually neglected in the conventional linear dynamic model. Subsequently, investigations on the dynamic differences between the proposed nonlinear dynamic model and the linear one are conducted. The results demonstrate that the stiffness of the turbine blades in the proposed nonlinear dynamic model increases with larger overall motions but that in the linear dynamic model declines with larger overall motions. Deformation of the blades in the nonlinear dynamic model is more reasonable than that in the linear model as well. Additionally, more distinct coupling effects are observed in the proposed nonlinear model than those in the linear model. Finally, it shows that the aerodynamic loads, the structural loads and global dynamic responses of floating offshore wind turbines using the nonlinear dynamic model are slightly smaller than those using the linear dynamic model. In summary, compared with the conventional linear dynamic model, the proposed nonlinear coupling dynamic model is a higher-order dynamic model in consideration of the rigid-flexible coupling effects of floating offshore wind turbines, and accord more perfectly with the engineering facts.