大型风力机叶片腹板根部形状研究

RESEARCH ON THE SHAPE FOR WEB ROOT OF LARGE WIND TURBINE ROTOR BLADE

叶片腹板根部形状不同,造成腹板应力分布也不同,特别是对于薄弱部位还可能因为应力叠加引发叶片破坏。本文主要研究不同腹板根部形状对腹板根部危险区域应力分布的影响,并将腹板根部切除形状的比例系数定义为C型结构形状因子F,然后对C型结构形状因子分为三种情况进行讨论,结合有限元分析结果和现场的挂机结果,确定腹板根部的最优形状。

Different root shape of shear web,result different stress distribution of web,especially for the weak parts may be caused blade damage due to the stress superposition. This article discusses the influence of different web root shape on the stress distribution of dangerous area. By calling the proportion coefficient of web root excision shape to C-type form factor F,the paper uses three ways to discuss the C-type form factor. By combine the result of finite element analysis and practice,the best shape of web root was finally determined.