潮流能水轮机复合材料叶片结构力学性能分析及选型

Mechanical performance and shape determination of composite tidal turbine blades

叶片是潮流能水轮发电机的主要承载构件,直接影响着整机的性能和寿命。文章针对100 k W水平轴潮流能水轮发电机复合材料叶片,结合叶片受力特点,提出了腹板式和箱梁式两种全复合材料叶片结构,并应用有限元软件ANSYS建立了含有复合材料铺层信息的三维模型,分析了叶片的强度、叶尖挠度及材料失效性。通过对两种叶片结构对比分析表明,箱型梁式叶片的结构形式更为合理,叶片自重可减少21%。文章的研究成果可为今后同类叶片的设计提供参考。

Blades are important components for tidal turbines, and they determine performances and life cycles of tidal turbines. The paper presented two types of composite blades including web type and box beam type for 100 k W horizontal axis tidal turbine considering the mechanical characteristics of blades. A 3D finite element model including stacking sequences was established in software ANSYS, strength, tip deflection and material failure of blades were analyzed and compared. The comparison results demonstrated that box beam type blade is rational, and self-weight of blades can be reduced by 21%. Results and conclusions in the paper can provide a reference for similar blades design.