为了研究具有三维复杂构形的复合材料风机叶片的逐次破坏过程和极限承载能力,将复合材料细观力学非线性本构理论桥联模型与有限元软件ABAQUS通过用户子程序UGENS结合起来对风力发电机叶片结构进行极限强度分析.只需提供纤维和基体的材料性能参数、纤维体积含量以及蒙皮和增强筋的铺层数据包括铺设角、层厚和铺层数,就可预报出复合材料复杂叶片结构的整体承载能力以及叶片破坏所处的位置,为正确评估和合理设计风机叶片结构提供了一种简便有效的分析方法.以一种20 kW风机叶片为例,用此方法实现了新型复合材料叶片结构的极限分析和合理设计,提高了叶片的强度和刚度,有效降低了叶片的重量.本文中的方法同样适用于其它复合材料复杂结构的极限分析与强度设计.
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