Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

Global stability of empty and fluid-filled imperfect cylindrical shells

P.B. Gonçalvesa,*, Z.J.G.N. Pradob, F.M.A. Silvaa
aCivil Engineering Department, Catholic University, PUC - Rio, 22453-900, Rio de Janeiro, RJ, Brazil bCivil Engineering Department, UFG, 74605-200, Goiânia, GO, Brazil
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ABSTRACT
Based on Donnell shallow shell equations, this work discusses the influence of geometric imperfections on the parametric instability and snap-through buckling of empty and fluid-filled cylindrical shells under axial loads. In particular, the influence of imperfections on the evolution of basins of attraction is studied in detail. As parameters are varied, basins of attraction undergo quantitative and qualitative changes that may affect seriously the safety and stability of the shell.

Keywords:  Cylindrical shells; Fluid-structure interaction; Parametric instability; Geometric imperfections; Global instability; Dynamic buckling
* Corresponding author. Tel.: +55 21 3114 1188; Fax: +55 21 3114 1195; E-mail: paulo@civ.puc-rio.br