000005025 001__ 5025
000005025 005__ 20141120140005.0
000005025 04107 $$aeng
000005025 046__ $$k2008-06-25
000005025 100__ $$aDubourg, V.
000005025 24500 $$aRELIABILITY–BASED DESIGN OPTIMIZATION: AN APPLICATION TO THE BUCKLING OF IMPERFECT SHELLS

000005025 24630 $$n4.$$pProceedings of the 4th International ASRANet Colloquium
000005025 260__ $$bASRANet Ltd., 2008
000005025 506__ $$arestricted
000005025 520__ $$2eng$$aDiscrepancies observed in experimental buckling loads of thin shells are often due to the random nature of initial shape imperfections, material properties and non-perfect boundary conditions. The work presented in this paper aims at finding the optimal dimensions of a single bay of a ring-stiffened cylinder representative of a submarine pressure hull under external hydrostatic pressure. It accounts for uncertainties of material properties and amplitudes of imperfections, supposed distributed over the two most critical buckling modes in a first simplified approach (overall and interframe buckling modes). The Reliability-Based Design Optimization problem considered here consists in finding an optimal deterministic design minimizing the weight of the structure while meeting a prescribed safety level. The present work hinges on closed-form / semi-numerical solutions for the buckling problems in a first approach. FORM reliability results based on a 3D shell finite element model are presented in a second part, in an effort to base such a design optimization on a more accurate mechanical model and to provide a sound basis for the optimal design of structures prone to buckling.

000005025 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000005025 653__ $$a

000005025 7112_ $$a4th International ASRANet Colloquium$$cAthens (GR)$$d2008-06-25 / 2008-06-27$$gASRANet4
000005025 720__ $$aDubourg, V.$$iNoirfalise, C.$$iBourinet, J.-M.
000005025 8560_ $$ffischerc@itam.cas.cz
000005025 8564_ $$s294297$$uhttps://invenio.itam.cas.cz/record/5025/files/071_Bourinet,_Jean-Marc.pdf$$yOriginal version of the author's contribution as presented on CD, paper No. 71.
000005025 962__ $$r4967
000005025 980__ $$aPAPER