EXAMPLE 6, Slide 5: Objective versus design iterations during an execution of the GENOPT processor called "SUPEROPT"

This is Fig. 4 from the 2010 GENOPT paper. This slide shows optimization of an internally ring and stringer stiffened cylindrical shell with a weld land.

This plot shows the objective versus design iterations during an execution of SUPEROPT. Each "spike" in the curve corresponds to a new "starting" design obtained randomly by the GENOPT processor, AUTOCHANGE. The results shown here were obtained with 5 executions of OPTIMIZE for each execution of AUTOCHANGE.

In this "weld land" study GENOPT is combined with BIGBOSOR4. The results displayed here and in the next 5 slides are from BIGBOSOR4 models in which the "true prismatic" formulation is used.

Reference for the "true prismatic shell" model:

Bushnell, David, "Comparison of a "huge torus" model with a true prismatic model for: 1. an axially compressed simple monocoque cylindrical shell, 2. an axially compressed optimized truss-core sandwich cylindrical shell, and 3. an axially compressed optimized internally ring and stringer stiffened cylindrical shell with a T-stiffened weld land, Unpublished report for NASA Langley Research Center, February 12, 2010 and contained in the file, ...bigbosor4/case/prismatic/prismaticshell.pdf

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