双气室缓冲气囊多学科设计优化

针对某型着落装备着落工况的一种双气室新型缓冲气囊，基于ISIGHT多学科设计优化平台和HYPERMESH，LS-DYNA有限元分析软件以及FORTRAN语言编写的程序，通过组合优化策略对双气室缓冲气囊进行了多学科设计研究.以气囊体积为优化目标，以上气室的高度、初始充气压力和下气室的高度、初始冲气压力、排气压力、排气孔面积、气囊底面积、着落装备过载和最小离地距离等多学科要求同时为约束条件进行了设计优化.结果表明：通过多学科设计优化，在着落装备过载和最小离地距离满足设计要求的同时，气囊体积达到了最小,减小设计周期和减少试验次数，降低研制成本.

Optimal Design of Double-chamber Airbag Based on Multidisciplinary Design Optimization Technology

The optimal design of a new double-chamber airbag impact attenuation system for landing equipment was addressed. The design methodology involved the multidisciplinary design optimization technology and the combinatorial optimization strategy based on the commercial software of ISIGHT, HYPERMESH, LS-DYNA and a program by FORTRAN code. The optimization objective was the airbag volume. The constraint conditions included the height and the initial pressure of the above chamber, the height, initial pressure, venting pressure, venting area, bottom area of the under chamber, the overload and the smallest distance from the ground of the landing equipment. The results showed that the airbag reached the minimum volume based on the multi-disciplinary design optimization method, and the overload and the smallest distance from the ground of the landing equipment met the design requirements. The multi-disciplinary optimization design is feasible for design of airbag to cut down development cost by reducing the design cycle and the number of tests.