Example 11, Slide 23: Buckling of optimized axially compressed aluminum cylindrical shell with external T-shaped stringers

This is Fig. 36 from the 2014 GENOPT paper.
Three buckling modes of an axially compressed externally T-stringer-stiffened cylindrical shell, “equivalent” (same radius and material) to that shown in the previous two slides, was optimized by PANDA2 [30]. The weight of 90 degrees of this optimized T-stiffened cylindrical shell is 658 lb. (Compare with 485.8 lb for the optimized corrugated cylindrical panel shown in the previous two figures.)

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