Multiobjective optimization of orthogonally stiffened cylindrical shells for minimum weight and maximum axial buckling load

In the present research, the weight and axial buckling optimization of orthogonally stiffened cylindrical shells is carried out by the Genetic Algorithm. Constraints include two nondimensional functions of weight and buckling load in such a way that the stiffened shell has no increase in the weight...

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Bibliographic Details
Published in:Thin-walled structures Vol. 48; no. 12; pp. 979 - 988
Main Authors: Sadeghifar, M., Bagheri, M., Jafari, A.A.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01.12.2010
Elsevier
Subjects:
Axial buckling load
Buckling
Cylindrical shells
Energy of solution
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Genetic algorithms
Mathematical analysis
Minimum weight
Multiobjective optimization
Optimization
Physics
Shells
Solid mechanics
Stiffeners
Structural and continuum mechanics
Thin walled
Weight
Cylindrical shells
Multiobjective optimization
Weight
Axial buckling load
Genetic algorithms
Constraint
Multiobjective programming
Simple support
Revolution shell
Modeling
Optimization
Reinforced structure
Reinforced shell
Rayleigh Ritz method
Genetic algorithm
Weight function
Critical load
Axial load
Ritz method
Cylindrical shell
Buckling
Stiffener
ISSN:0263-8231, 1879-3223
Online Access:Get full text
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Summary:In the present research, the weight and axial buckling optimization of orthogonally stiffened cylindrical shells is carried out by the Genetic Algorithm. Constraints include two nondimensional functions of weight and buckling load in such a way that the stiffened shell has no increase in the weight and no decrease in the buckling load with respect to the initial unstiffened shell. In analytical solution, the Rayleigh–Ritz energy procedure is applied and the stiffeners are treated as discrete members. The optimization is implemented for shells with simply supported end conditions stiffened by four shapes of stiffeners including rectangular-, cee-, I-, and hat-shaped ones. The results show that the I-section and rectangular-section stiffeners are, respectively, the most and the least efficient in designing stiffened cylindrical shells for minimum weight and maximum critical axial buckling load.
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ISSN:0263-8231
1879-3223
DOI:10.1016/j.tws.2010.07.006