基于NASTRAN的复合材料后梁稳定性优化设计与开口补强分析

Optimal Design and Opening Strengthen Analysis of Composite Rear Spar Stability Based on Nastran

结构失稳破坏在飞机静力试验中较为常见,结构稳定性破坏会导致全机结构的破坏。复合材料后梁开口后,对结构稳定性提出了更高的要求,因此必须在满足后梁静强度要求的基础上,对结构稳定性进行优化设计。应用理论计算和有限元软件Nastran对后梁结构稳定性进行了分析,对后梁结构立柱进行了布局优化设计和截面尺寸设计,最后对复合材料后梁开口结构进行了稳定性分析,为复合材料后梁详细设计提供了参数支持。

Structural instability failure is common in aircraft static test,and structural stability failure will lead to structural failure of the whole aircraft. The opening of the composite material rear spar put forward higher requirements on the stability of structure. Firstly we have to meet the static strength requirements,then the stability of the structure will be made an optimization design. Based on theoretical calculation and finite element analysis software Nastran,this article analyzes the rest rear spar stability and makes columns of rear spar rest structure layout optimization design and section size optimization design. It will provide detailed design parameters support for the composite material rear spar.