多工况下复合材料层合板开口补强优化设计

复合材料层合板广泛应用于航空航天结构，其开口补强问题一直备受关注。以含大开口的复合材料层合板为研究对象，针对拉伸、剪切、压缩三种不同工况，分别采用不同材料和不同补强型式进行补强结构优化设计。以补强结构重量为目标函数，采用多级优化方法，对补强结构参数进行优化设计。对不同补强型式，不同补强材料下的重量特性进行对比分析。结果表明：在不同工况下，相较于螺接补强和共固化补强，插层补强型式较优，结构重量增加较小。

Optimization of Reinforcing Structure for Composite Laminate with Cutout Subject to Different Load Cases

Composite laminate has enjoyed a wide application in aerospace structures, thus the reinforcement of the cutout has always been concerned. Composite laminate with large opening under three different load cases: tension, shear and compress were investigated. The optimization design of different types of reinforcement with different materials was also conducted. The parameters of reinforced structure were optimized to satisfy the objective weight function, and the multi-level optimization method was adopted during the optimization process. The weight characteristics of reinforced structure were also compared and analyzed. The results show that under different load cases, compared with bolt connection reinforcement and co-curing reinforcement, intercalation reinforcement is better with the minimum weight increase.