摘要
本文针对客机复合材料球面框,通过有限元计算,对球面框上的加强筋对结构屈曲性能的影响展开深入研究。球面框球皮采用碳纤维层合板,加强筋为填充PMI泡沫的帽形加强筋。建立有加强筋和无加强筋两种结构方案,并建立有限元模型进行静力和屈曲分析计算。结果表明客机复合材料球面框的加强筋对球面框结构的屈曲性能和稳定性有一定的改善作用,但对球面框结构的静强度改善作用不大,增加加强筋后球面框的应变和位移变化较小。球面框结构设计时出于成本和制造工艺考虑可以不采用加强筋。
In this paper, the research on structure buckling performance due to stiffeners on the composite domed rear pressure bulkhead of civil aircraft is carried out. The dome skin adopts the CFRP laminate and the stiffeners are hat shape stiffeners with PM1 loam core. According to establish two categories of structure with and without stiffeners, the static and buckling analyses by using of finite element analysis are carried out. The results show that the stiffeners on the composite domed rear pressure bulkhead have a positive influence on improving the buckling performance and stability of the struc- ture, but the stiffeners contribute less on the improvement of static strength of rear pressure bulkhead. The strain and deflec- tion of the rear pressure bulkhead are improved slightly. So it makes no sense to increase the stiffeners on the domed rear pressure bulkhead from the perspective of cost saving and manufacturing.
出处
《航空制造技术》
2016年第23期112-115,共4页
Aeronautical Manufacturing Technology
关键词
复合材料球面框
帽形加强筋
屈曲分析
Composite rear pressure bulkhead
Hat-shape stiffener
Buckling analysis
