Some prismatic structures that can be analyzed by BOSOR4/BIGBOSOR4

This is Fig. 33 from the 1974 BOSOR4 paper. This slide shows some typical prismatic shell structures that can be analyzed with BOSOR4/BIGBOSOR4. (from Computers & Structures, Vol. 4, pp 399 – 435, 1974)

Between 1974 and 2009 prismatic shells and panels were modeled in BOSOR4/BIGBOSOR4 as parts of a huge torus, as shown in the next two slides.

In 2010 the equations for a true prismatic thin-walled structure (and not just a "huge torus" approximation of a prismatic structure) were implemented in BIGBOSOR4, as documented three slides hence.

Reference for the "true prismatic" shell model incorporated recently (2010) into BIGBOSOR4:

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an axially compressed optimized internally ring and stringer stiffened cylindrical shell with a T-stiffened weld land, Unpublished report for NASA Langley Research Center, February 12, 2010 and contained in the file, ...bigbosor4/case/prismatic/prismaticshell.pdf

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