EXAMPLE 6, Slide 9: General buckling of the axially compressed cylindrical shell from a 90-degree model with discrete stringers and smeared rings

This is Fig. 7 from the 2010 GENOPT paper. The axially compressed cylindrical shell is analyzed as a true prismatic shell and not as a huge torus of the type shown three slides ago.

Symmetry conditions are applied at 0 degrees (bottom of the figure) and at 90 degrees (top of the figure), which implies that this model has weld lands spaced at 180 degrees, not at 120 degrees. In spite of this, the general buckling mode resembles that displayed in the previous slide.

This model, although optimized by GENOPT, is generated by the PANDA2 processor called PANEL3, created especially to handle stiffened cylindrical shells with added T-stiffened weld lands.

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