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PANDA2-optimized, axially compressed, ring and stringer stiffened, perfect and imperfect cylindrical shells

This is Table 4 in the 2007 axialcomp paper. This slide lists optimum designs from PANDA2 suitable for analysis by STAGS (dimensions in inches).

"Imperfect" means the shell has an imperfection shape in the form of the critical general buckling mode.

The term, "Koiter", refers to the branch in PANDA2 in which local post-buckling states are computed. "no Koiter" means this postbuckling analysis branch is skipped.

"ICONSV" is a "conservativeness" index used in PANDA2. ICONSV=1 (most conservative model) is the recommended value.

"yes change imperfection" means that the amplitude of the general buckling modal imperfection is inversely proportional to the length and breadth of a combination of its axial and circumferential half-wave lengths.

"no change imperfection" means that the amplitude of the imperfection remains fixed at its user-provided value no matter what the shape of the general buckling modal imperfection is.

(From: AIAA 48th Structures, Structural Dynamics, and Materials Conference, Paper no. AIAA-2007-2216, 2007)

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