漂浮式海上风机平台阻尼结构设计与研究

Design and Research on the Foundation Damping Structure of Semi-Submersible Floating Offshore Wind Turbines

[目的]为了寻求经济有效的漂浮式风机水动力性能提升方案,研究了加装垂荡板的设计方案,从而提升浮体水动力阻尼性能和减摇效果,最终改善漂浮式海上风电机输出功率的稳定性。[方法]以10 MW半潜型浮式风机为例,通过计算流体力学的方法,探讨了垂荡板结构不同设计参数对于提升漂浮式风机基础水动力阻尼的效用,寻找出优化设计方案。[结果]经过优化设计后的垂荡板结构垂荡阻尼较原结构增大14.9%,摇摆阻尼增大19.1%,而“梅花形”边缘垂荡板垂荡运动阻尼较原始模型提升36.98%。[结论]揭示泄涡产生与垂荡板水动力阻尼改善的形成机理,创新性地提出“梅花形”垂荡板结构,有效改善浮体垂荡运动的阻尼性能,上述结论为此类漂浮式海上风机基础结构的研究与设计工作提供重要参考。

[Introduction]In order to find an economic and effective solution to the improvement of the hydrodynamic performance of floating offshore wind turbines,this paper studies the design scheme of heave plates to improve the hydrodynamic damping performance and anti-rolling effect of the floating body,and finally improve the stability of the output power of floating offshore wind turbines.[Method]Taking a 10 MW semi-submersible floating wind turbine as an example,this paper discussed the effect of different design parameters of the heave plate structure on improving the hydrodynamic damping using the method of computational fluid dynamics,and found an optimal design scheme.[Result]After optimized design,the heave damping of the heave plate structure is increased by 14.9%,and the roll damping is increased by 19.1%,and while the heave damping of the“quincunxshaped”edge heave plate is increased by 36.98% compared with the original model.[Conclusion]This paper reveals the formation mechanism of the generation of vortex vents and the improvement of the hydrodynamic damping of the heave plate,and puts forward the“quincunx-shaped”heave plate structure in an innovative manner that can effectively improve the damping performance of the heave motion of the floating body.The above conclusions provide important references for the research and design of the foundation structure of the floating offshore wind turbines of this kind in the future.