EXAMPLE 6, Slide 4: Huge torus model of a cylindrical shell of length L

This is Fig. 3a from the 2010 GENOPT paper. This slide shows a schematic of a “huge torus” model. For most “huge torus” models, a good choice of RBIG is RBIG = 100xL/pi. The cylindrical shells studied here have RADIUS = 48 inches.

For the “true prismatic” shell model the kinematic relationships introduced recently (2010) into BIGBOSOR4 correspond essentially to RBIG = infinity. The "true prismatic" BIGBOSOR4 model is used to generate all the results in the 2010 GENOPT paper. (drawing by Robert P. Thornburgh)

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an axially compressed optimized internally ring and stringer stiffened cylindrical shell with a T-stiffened weld land, Unpublished report for NASA Langley Research Center, February 12, 2010 and contained in the file, ...bigbosor4/case/prismatic/prismaticshell.pdf

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