面向设计的复合材料旋翼桨叶动力优化设计

DESIGN ORIENTED DYNAMIC DESIGN OPTIMIZATION OF COMPOSITE ROTOR BLADES

提出一种面向设计的复合材料旋翼桨叶结构动力优化方法。采用典型剖面设计、变量连接、铺层变量连续化等方法，有效地处理了剖面内部形状、复合材料铺层、配重质量３类设计变量。在动力分析模型中考虑了剖面翘曲、耦合变形和陀螺力的影响，由三级数值计算模式实现固有频率灵敏度分析。约束条件包括了固有频率、结构重量、自转惯量等设计要求，优化求解采用基于序列二次规划的算法。上述方法真实反映了桨叶结构特征和实际工程设计要求。

A design oriented method for the dynamic design optimization of composite rotor blades is presented. The design variables are classified into the shape variables of the cross section, the layer variables of composites, and the mass variables of lump masses. The methods of typical cross section design, variable linking, and continuing of the layer variables have been proposed to deal with these three kinds of variables effectively. The dynamic model has accounted for the effects of the cross section warping, the deformations coupling, and the gyroscopic force. The sensitivity analysis of the coupled frequencies is implemented by means of a three level calculation. The structural weight, vibration frequencies, and rotation inertia of the blade have been included into constraints. The optimization solution is based on the algorithm of sequential quadratic/linear programming. These methods are suitable to practical design and particular features of composite rotor blades.