In order to connect different components of the imperfections with structural features and their effect on shell buckling strength, the imperfections are generally decomposed using Fourier series.

Such generalized model can be used for global buckling analysis of grid-stiffened structures with different types of gr.

Under the global buckling constraint condition,the configuration of grid-stiffened composite panels was optimally designed by means of genetic algorithm.

The critical pressure of global buckling for simply supported square-honeycomb sandwich plates subjected to in-plane uniform pressure is obtained by using Fourier series and weighted residual method.

For thin-walled cold-formed steel members subjected to compression or bending,there are three buckling modes—local plate buckling,section distortional buckling and overall buckling.

The interactive local buckling modes of the trapezium corrugated channel sections with different width-to-thickness ratios,the overall buckling modes and the ultimate bearing capacity of the structure subjected to half-span and full-span vertical uniform loads were theoretically studied by FEM.

In order to attain lattice structure with high load-carrying efficiency,according to the two kinds of probable buckling modes of fiber winding composite lattice structures,overall buckling and local buckling,the equations used to compute overall buckling loads and local buckling loads were derived,and MATLAB program was compiled and used to compute buckling loads.