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建立了某兆瓦级风力机叶片各截面两种不同的有限元模型并分别对其截面弯曲刚度进行分析。两种模型均采用悬臂梁边界条件,第一种模型建立了各截面外轮廓线沿轴向拉伸后的等截面梁壳体模型,第二种方法建立了各截面平面模型沿轴向拉伸后的等截面梁实体模型。将两种模型的单元坐标系调整到与实际铺层基本一致,所计算出各截面刚度与国外技术文件所提供的数据基本吻合,从而验证了这一分析叶片各不同位置截面刚度方法的有效性,对风力机叶片结构自主开发设计具有一定的参考价值。
Two different finite element models of each section of a MW wind turbine blade were established and the bending stiffness of the section was analyzed respectively. The two models adopt the cantilever boundary conditions. The first model establishes the isometric cross-section beam shell model after the outer contour lines of each cross-section are stretched in the axial direction. The second method establishes the axial stretching After the cross-section beam solid model. The unit coordinate system of the two models is adjusted to be consistent with the actual ply, and the calculated stiffness of each section is basically consistent with the data provided by foreign technical documents, thus verifying the validity of this method for analyzing the section stiffness of different positions of blades , It has certain reference value for the self-development and design of wind turbine blade structure.