|
|
|
|
|
|
|
Flexural-Torsional buckling of axially compressed cruciform column with flanges |
|
Buckling of oval cylindrical shell in bending |
|
General buckling mode of optimized cylindrical balloon with 40 truss-like modules over 90 degrees of circumference |
|
Longitudinally corrugated long cylindrical shell under external pressure |
|
Axially compressed corrugated cylindrical shell |
|
|
|
|
|
|
|
|
|
Both perfect and imperfect shells are considered in our optimization. (a) Perfect wavy shell. (b) Imperfection shape based on critical buckling mode. |
|
General buckling of optimized, axially compressed corrugated panel |
|
Buckling of an optimized, complexly corrugated, axially compressed, cylindrical shell analyzed with HUGEBOSOR4 |
|
A finite element model of a complexly corrugated cylindrical shell under axial compression previously optimzed by GENOPT/BIGBOSOR4 |
|
Critical buckling mode of the uniformly axially compressed, complexly corrugated panel shown in the previous slide |
|
|
|
|
|
|
|
|
|
Another HUGEBOSOR4 model of an optimized, complexly corrugated cylindrical shell with smoothing under uniform axial compression |
|
STAGS model of the same optimized, complexly corrugated cylindrical shell with smoothing under uniform axial compression |
|
BIGBOSOR4 model of a simpler optimized, complexly corrugated cylindrical shell with smoothing under uniform axial compression |
|
STAGS model of the same simpler optimized, complexly corrugated cylindrical shell with smoothing under uniform axial compression |
|
The WEIGHT of “global” optimum designs versus number of major segments over WIDTH/2=50 inches |
|
|