复合材料机翼加筋壁板稳定性分析

Stability analysis on the ribbed panel of the composite wing

利用工程及有限元方法分别分析了加筋壁板整体和局部稳定性。分析发现:在有限元计算中模型边界条件的选取对分析结果有着较大的影响。通过大型有限元软件MSC.Patran/Nastran,计算了不同边界条件下加筋壁板稳定性,将结果与工程计算结果比较,得到一种有限元分析稳定性中较合适的模型及边界条件。同时运用论证的有限元模型及边界条件,分析了相同横截面积下,不同桁条设计方案的壁板整体稳定性,结果显示桁条横截面设计对加筋壁板的稳定性有着很大的影响。

The overall and local buckling of the ribbed panel is analyzed by project and finite element methods in this paper.The study shows that the choice of boundary conditions in the finite element method has a great influence on the results.The stability of the ribbed panel in different boundary conditions is analyzed by using the FE software of MSC.Patran.Compared the results with the project method,an appropriate choice of the model and boundary conditions is put forward.The stability of the ribbed panel with the same area of the stringer and different stringer designs is analyzed by using the model and boundary conditions mentioned above.The results show that the design of the stringer cross section has a great influence on the stability of the ribbed panel.