复合材料加筋壁板结构工程化优化设计

Engineering Optimization Design of Composite Stiffened Panel

针对飞机结构减重的需求,对复合材料加筋壁板结构的优化设计工程化方法进行发展和研究。为减少优化规模,采用布局尺寸优化和铺层顺序优化两级优化的策略进行优化。布局尺寸优化采用内点罚函数法、Powell方法和黄金分割法,在保证稳定性约束条件下减少结构重量;铺层顺序优化运用了铺层参数的概念来提高优化效率。算例表明,该方法在满足约束条件的情况下,很好地实现了结构的减重,且求解效率较高,方便工程实用。

Considering the requirement of weight reduction of aircraft structure, the engineering optimization design method for composite stiffened panel is developed. To reduce the scale of optimization, the strategy of two-step optimization is selected, which consists of size optimization and stacking sequence optimization. The interior point penalty function method, Powell method and golden section method are used in the first step, which can reduce the structure weight in the condition of maintaining structure stability. The layer parameters are applied in the second step to improve the optimization efficiency. The example shows that the method in this paper is well used in structural weight reduction with high solving efficiency and engineering practicability.