飞机结构总体优化设计方法

优化设计可以改善结构的应力分布，合理布置材料，从而提高材料的利用率.通过对全机结构逐层分解，确定优化设计变量、优化区域以及响应约束，并应用MSC Nastran中的可行方向法和敏度分析方法，对MA700飞机的机翼进行优化设计方法研究，考虑稳定性因素，初步解决长桁尺寸确定的问题，为后续优化设计工作积累经验.

Global optimization design method study of aircraft structure

The material utilization can be improved by optimization design which makes the stress distribution and the material arrangement more reasonable. The variables, optimization regions and the response constraints are determined through decomposition of the whole aircraft structure and the optimization design method of the wing of MA700 is studied with the feasible direction method and sensitivity analysis on the MSC Nastran platform. In the analysis, the stability problem is considered and the stringer size is preliminarily determined which offers some experience for the subsequent optimization design work.