基于等效刚度矩阵的复合材料机翼盒段优化设计

通过刚度矩阵转换,将复合材料层合板等效成正交各向异性材料板,并采用beam单元模拟加筋桁条。将机翼盒段的蒙皮厚度和加筋桁条面积作为设计变量,机翼盒段的质量作为目标函数,运用多岛遗传算法和序列二次规划算法相结合的优化方法,对多变量、多约束条件下的大展弦比复合材料机翼进行结构优化设计。通过算例分析,机翼的复合材料结构质量下降了9.55%,优化时间较短。

Optimization Design for Box of Composite Wing Based on Effective Stiffness Matrix

Based on stiffness matrix,the modulus of composite laminate is translated to the modulus of orthotropic plate and the stiffeners are idealized as beam.In the method of combining multi-island genetic algorithm with sequential quadratic algorithm,the thickness of panels and the area of stiffeners are regarded as design variables and the weight of the box of composite wing as objective function to design the structure of a high aspect-ratio composite wing with multiple variables and constraints.The numerical e...