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This is Fig. 25 from the 2010 GENOPT paper, "Use of GENOPT and BIGBOSOR4 to optimize weld lands in axially compressed stiffened cylindrical shells and evaluation of the optimized designs by STAGS" by David Bushnell and Robert P. Thornburgh, AIAA 51st Structures, Structural Dynamics, and Materials Conference, 2010, AIAA Paper 2010-2927, called "2010 GENOPT paper" in the next two slides.
Shown here is a STAGS sub-domain model of the GENOPT-optimized internally ring and stringer stiffened axially compressed cylindrical shell with a weld land. Only one ring bay and one half of a T-stiffened weld land are included in this 60-degree sub-domain STAGS model. Symmetry conditions are imposed along the two longitudinal edges.
This figure shows the critical local buckling mode shape.
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