In the symplectic method, the axisymmetric and non-axisymmetric buckling modes can be obtained directly. 这种辛方法克服了传统振型函数方法的局限性，并可直接得到轴对称和非轴对称的屈曲模态。
Experiment results also reveal that stiffened thin-walled composite plate can bear greater load after buckling.And buckling mode change after stringer adhesive fails. 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。
