Example 12, Slide 9: General buckling modes of the same optimized cross-section profile shown two slides ago, but extended to include 5xWIDTH

Fig. 11 from the 2014 GENOPT paper.
Optimized “fold98updown” with the freer boundary conditions along the left-hand edge. This BIGBOSOR4 model of general symmetric buckling includes five full WIDTHs of 100 inches each. (The total width of the wide panel is 500 inches, with symmetry conditions applied along both the left-hand and right-hand edges.) There are 80 shell segments in this BIGBOSOR4 model. The optimum design of the panel cross section is the same as that shown in the previous two figures. The eigenvalues agree well with those from the half-width model, which is the much simpler BIGBOSOR4 model that is used for optimization of the panel cross section.

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