采用有限元数值模拟方法，研究了蒙皮内含分层损伤复合材料格栅加筋板结构(ags)的稳定性问题。
A finite element method was developed for the numerical analysis of advanced grid stiffened structure (AGS), and the stability problem of AGS with an embedded delamination was investigated.
试验还发现复合材料薄壁加筋板结构有较高的后屈曲承载能力，后屈曲过程中由于桁条脱胶会造成屈曲模态的变化。
Experiment results also reveal that stiffened thin-walled composite plate can bear greater load after buckling. And buckling mode change after stringer adhesive fails.
将此方法应用于复合材料加筋结构的冲击载荷识别，加筋结构等效为材料性质不均匀分布的层板结构，采用假设模态法建立正向冲击响应模型。
The stiffened composite panel is modeled as an equivalent laminate with varying properties and the forward impact response is obtained using an assumed mode approach.
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