Design of shell structures for buckling using correction response surface approximations
Satchi Venkataraman, Raphael T. Haftka, Theodore F. Johnson · 7th AIAA/USAF/NASA/ISSMO Symposium on Multidisciplinary Analysis and Optimization · 1998
Several programs for the analysis and design of shells of revolution against buckling, including PANDA2, BOSOR4 and STAGS, are discussed in the paper. It is demonstrated that inexpensive (and possibly less accurate) solutions based on simplified models available in PANDA2 can be effectively combined with more expensive and more accurate solutions available from BOSOR4 and STAGS. This is achieved by using response surfaces to approximate the ratio of the buckling loads from the expensive and less expensive programs. The utility of the procedure is demonstrated with an optimization of a ring stiffened cylinder. In addition, the effect of modeling decisions, such as the choice of finite element to model rings, are discussed.