|
|
||
|
|
|
|
This is Fig. 6 from the 2010 GENOPT paper. This slide shows the optimized configuration after the execution of SUPEROPT.
180 degrees of the axially compressed cylindrical shell are included in the BIGBOSOR4 model, with symmetry conditions appled at the beginning and end of the 180-degree arc. The T-stiffened weld lands are spaced at 120-degree intervals in this example.
The acreage internal stringers and rings with rectangular cross sections (previously optimzed by PANDA2) are smeared out in this BIGBOSOR4 model, which is analyzed as a true prismatic shell and not as part of a huge torus such as that shown four slides ago.
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an axially compressed optimized internally ring and stringer stiffened cylindrical shell with a T-stiffened weld land, Unpublished report for NASA Langley Research Center, February 12, 2010 and contained in the file, ...bigbosor4/case/prismatic/prismaticshell.pdf
Page 54 / 190