A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Optimisation of stiffeners for maximum fundamental frequency of cross-ply laminated cylindrical panels using social group optimisation and smeared stiffener method
AbstractA review of the literature reveals a dearth of research on the maximisation of natural frequencies of laminated composite stiffened panels. The present study combines an analytical solution based on the smeared stiffener method with a novel social group optimisation (SGO) algorithm to develop a procedure for the solution of such an optimisation problem. For this purpose, cross-ply laminated circular-cylindrical panels with a simply supported condition, stiffened by stringers and rings, are considered. The quantities and sizes of the stiffener are optimised to maximise the fundamental frequency of the panels under practical constraints. Example optimisations of various panel geometries are performed. The optimisation results show that the fundamental frequency can be increased significantly by using tailored rings and that for the considered numerical examples, stringers do not make any beneficial contribution to the maximisation of the fundamental frequency. It is also demonstrated that the SGO algorithm is an efficient tool for this kind of mixed-integer constrained optimisation problem.
HighlightsA new procedure for optimal design of stiffeners for laminated shell is developed.It combines smeared stiffener method with a novel social group optimisation (SGO).Stiffener quantity and size are optimised for maximising the fundamental frequency.The fundamental frequency can be significantly increased by the tailored rings.The SGO is shown efficient for this mixed integer constrained optimisation problem.
Optimisation of stiffeners for maximum fundamental frequency of cross-ply laminated cylindrical panels using social group optimisation and smeared stiffener method
AbstractA review of the literature reveals a dearth of research on the maximisation of natural frequencies of laminated composite stiffened panels. The present study combines an analytical solution based on the smeared stiffener method with a novel social group optimisation (SGO) algorithm to develop a procedure for the solution of such an optimisation problem. For this purpose, cross-ply laminated circular-cylindrical panels with a simply supported condition, stiffened by stringers and rings, are considered. The quantities and sizes of the stiffener are optimised to maximise the fundamental frequency of the panels under practical constraints. Example optimisations of various panel geometries are performed. The optimisation results show that the fundamental frequency can be increased significantly by using tailored rings and that for the considered numerical examples, stringers do not make any beneficial contribution to the maximisation of the fundamental frequency. It is also demonstrated that the SGO algorithm is an efficient tool for this kind of mixed-integer constrained optimisation problem.
HighlightsA new procedure for optimal design of stiffeners for laminated shell is developed.It combines smeared stiffener method with a novel social group optimisation (SGO).Stiffener quantity and size are optimised for maximising the fundamental frequency.The fundamental frequency can be significantly increased by the tailored rings.The SGO is shown efficient for this mixed integer constrained optimisation problem.
Optimisation of stiffeners for maximum fundamental frequency of cross-ply laminated cylindrical panels using social group optimisation and smeared stiffener method
Tran, Minh-Tu (author) / Pham, Hoang-Anh (author) / Nguyen, Van-Loi (author) / Trinh, Anh-Tuan (author)
Thin-Walled Structures ; 120 ; 172-179
2017-08-30
8 pages
Article (Journal)
Electronic Resource
English
Initial sizing optimisation of anisotropic composite panels with T-shaped stiffeners
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Initial sizing optimisation of anisotropic composite panels with T-shaped stiffeners
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