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应用有限元分析技术,采用ABAQUS有限元计算软件研究了加筋在受压状态下的线性屈曲和非线性后屈曲行为,给出了分析屈曲以及后屈曲的方法,并且做了一些不同条件的研究。考虑了不同单元类型对特征值屈曲分析临界载荷的影响,并比较了不同单元、不同边界条件在非线性后屈曲分析下加筋的临界屈曲载荷与承载能力。单元类型对线性屈曲几乎没有影响,而对非线性后屈曲分析结果影响很大,在进行后屈曲分析时有必要选择合理的单元。
Using finite element analysis technology, ABAQUS finite element software was used to study the linear buckling and nonlinear post-buckling behavior of the stiffened under compressive conditions. The methods of analyzing buckling and post-buckling were given, and some different conditions were studied . The influence of different element types on the critical load of eigenvalue buckling analysis is considered. The critical buckling loads and bearing capacity of stiffened members with different elements and different boundary conditions under nonlinear postbuckling analysis are compared. The type of unit has almost no effect on linear buckling, but has a great effect on the nonlinear postbuckling analysis. It is necessary to choose a reasonable unit for post-buckling analysis.