空气动力学学报2011，Vol.29Issue(3)：391-395,5.
大型风力机复合材料叶片动态特性及气弹稳定性分析
Dynamic analysis and aeroelastic stability analysis of large composite wind turbine blades
摘要
Abstract
Parametric modeling technique is developed to fast build the three-dimensional finite element shell model of a preliminarily designed large composite wind turbine blade, which is subsequently used in the dynamic analysis and static elastic aeroelastic stability analysis of the blade. In the dynamic analysis, natural frequencies and corresponding modal shapes are obtained for the blade in the case of being still as well as being rotating with rated revolution. For the rotating blade, the stress stiffening effect and spin-softening effect due to the centrifugal forces are taken into account. The static elastic aeroelastic stability analysis, i.e. buckling analysis in this paper, is distinct from its counterparts in adopting the pressure distributions obtained from CFD (Computational Fluid Dynamics) calculations as the loads. An interpolation code is developed to address the mismatch between the unstructured CFD grids of the blade surface and the finite shell elements used in the buckling analysis, allowing mapping the pressures computed by using CFD to the finite element model. It is concluded that structural analysis of large composite wind turbine blades using three-dimensional finite element shell model is beneficial to revealing the relatively weak zones of the blades.关键词
风机叶片/壳模型/模态分析/气弹稳定性/屈曲分析Key words
wind turbine blade/ three-dimensional shell model/ dynamic characteristic/ static aeroelastic stability/ buckling analysis分类
能源科技引用本文复制引用
刘伟,尹家聪,陈璞,苏先樾..大型风力机复合材料叶片动态特性及气弹稳定性分析[J].空气动力学学报,2011,29(3):391-395,5.基金项目
国家重点基础研究发展计划项目(2007CB714603) （2007CB714603）
