Weight optimization of stiffened cylinders under axial compression

Abstract A methodology is developed, by which one may design a stiffened cylinder of specified material, radius, and length, such that it can safely carry a given uniform axial compression with minimum weight. The solution procedure is divided into two stages, Phase I and Phase II. In Phase I, an unconstrained minimization is performed against one of the active constraints (in this paper-general instability) and data are generated in a sufficiently large region of the design space by employing efficient mathematical search techniques, in Phase II, these data are employed to arrive at the minimum weight configuration that satisfies all other constraints. Two design examples are presented which demonstrate the methodology.

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