Title and abstract from a 2006 PANDA2 paper about certain difficulties encountered when optimizing imperfect stiffened cylindrical shells

This and the next seven slides pertain to the paper, "Difficulties in optimization of imperfect stiffened cylindrical shells" by David Bushnell and Charles Rankin, AIAA 47th Structures, Structural Dynamics, and Materials Conference, Paper no. AIAA-2006-1943, 2006, referred to as "2006 difficult paper" in the next 7 slides.

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