摘要
利用复合材料有限元法和Tsai-Wu强度理论,研究铺层纤维方向对叶片3个不同结构区域叶根、翼型过渡区域和翼型区域强度性能的影响。结果表明铺层纤维方向对3个区域的强度性能影响具有明显差异性:0°铺层纤维方向在靠近叶根端部和叶片外区域处具有最优强度性能;45°铺层纤维方向在几何突变附近区域表现出最优强度性能。经分析表明差异性主要是由于不同区域的面内应力分量特性导致的,该结论的正确性由弯曲正应力的理论解和数值解的对比获得验证。同时铺层纤维方向对叶片强度最危险区域——叶根几何突变处的受压和受拉面的强度性能影响同样表现出差异性。
The influence, by ply angle, on the strength of three different structural regions of wind turbine blade- root, airfoil transition zone and airfoil zone was studied based on composite material finite element method and Tsai-Wu strength theory. The research showed that the influence is obvious different in the three different structural regions. 0° ply angle presents the best strength property both in the root near the end of blade and in the outer blade, while 45° ply angle has the best strength property in the area near the geometric catastrophe section. And the difference is determined by the character of in-plane stress components for different structural regions of blade, which is verified by the contrast of bending normal stress got from between theoretical method and FEM. Meanwhile, the influence on the strength by ply angle is also varied between the compressive and tensile area of the geometric catastrophe section-the most dangerous region.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2014年第5期835-840,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51075365)
