Arc-elasticity and hierarchical exploration of the neighborhood of solutions in mechanical design
Article dans une revue avec comité de lecture
In most industrial design processes, the approaches used to obtain a design solution that best fits the specification requirements result in many iterations of the “trial-and-error” type, starting from an initial solution. In this paper, a method is proposed to formalize the decision process in order to automate it, and to provide optimal design solutions. Two types of knowledge are formalized. The first expresses the satisfaction of design objectives, relating to physical behaviors of candidate design solutions. This formalization uses three models, an observation one, an interpretation one and an aggregation one; every design solution is qualified through a single performance variable (a single objective function). The second model is related to modifications that may or may not be applicable to the pre-existing solution. The Designer is often able to define preferences concerning design variables. Some modifications related to this pre-existing solution, can be preferred to other ones. A hierarchy of design variables is proposed to formalize these preferences. The concept of arc-elasticity is introduced as a post-processing indicator to qualify candidate solutions through a trade-off between the performance improvement and their relative distances to the initial solution. The proposed method is used and applied to a riveted assembly, and a genetic algorithm is used to identify optimal solutions.
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Article dans une revue avec comité de lectureSEBASTIAN, Patrick; LEDOUX, Yann; COLLIGNAN, Arnaud; PAILHES, Jérôme (Elsevier, 2012)Engineering design in mechanics is a complex activity taking into account both objective modeling processes derived from physical analysis and designers’ subjective reasoning. This paper introduces arc-elastic dominance ...
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Article dans une revue avec comité de lectureSCARAVETTI, Dominique; NADEAU, Jean-Pierre; PAILHES, Jérôme; SEBASTIAN, Patrick (Inderscience, 2005)Early stages of the design process are often based on designers| experience; assumptions and irreversible decisions restricting the solution space are taken. It is difficult to take into account simultaneously every ...
Numerical modeling and experimental study of a box-section tube bundle thermal energy storage for free-cooling of buildings Communication sans acteROUAULT, Fabien; BRUNEAU, Denis; SEBASTIAN, Patrick; EKOMY ANGO, Serge; LOPEZ, Jérôme (Luisa F. Cabeza, 2012)A numerical model able to simulate the thermal behavior of an energy storage made of a bundle of rectangular tubes is presented. This model take into account the close-contact melting phenomenon due to the decreasign density ...