Reference : Composite structures optimization using sequential convex programming
Scientific congresses and symposiums : Paper published in a journal
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Engineering, computing & technology : Computer science
Engineering, computing & technology : Mechanical engineering
http://hdl.handle.net/2268/92538
Composite structures optimization using sequential convex programming
English
Bruyneel, Michaël [Université de Liège - ULg > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique >]
Fleury, Claude [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Optimisation multidisciplinaire >]
2002
Advances in Engineering Software
Elsevier Science
33
7-10
697-711
Yes
No
International
0965-9978
Oxford
United Kingdom
Fifth International Conference on Computational Structures Technology
6-8 September 2000
Leuven
Belgium
[en] Design of composite structures ; Optimization ; Convex approximations
[fr] MMA family
[en] sequential convex programming ; structural optimization ; dual method ; composite structures
[en] The design of composite structures is considered here. The approximation concepts approach is used to solve the optimization problem. The convex approximations of the MMA family are briefly described. Several modifications of these approximations are presented. They are now based on gradient information at two successive iterations, avoiding the use of the expensive second-order derivatives. A two-point fitting scheme is also described, where the function value at the preceding design point is used to improve the approximation. Numerical examples compare these new purely non-monotonous schemes to the existing ones for the selection of optimal fibers orientations in laminates. It is shown how these two-point based approximations are well adapted to the problem and can improve the optimization task, leading to reasonable computational efforts. A procedure is also derived for considering simultaneously monotonous and non-monotonous structural behaviors. The resulting generalized approximation scheme is well suited for the optimization of composite structures when both plies thickness and fibers orientations are considered as design variables. It is concluded that the newly developed approximation schemes of the MMA family are reliable for composite structures optimization. All the studied approximations are convex and separable: the optimization problem can then be solved using a dual approach. (C) 2002 Civil-Comp Ltd and Elsevier Science Ltd. All rights reserved.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/92538
also: http://hdl.handle.net/2268/92789
10.1016/S0965-9978(02)00053-4

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