This paper will present how evolutionary structural optimization (ESO) and a recent modification of ESO, named Group ESO (GESO), can be used in tandem to fully optimize an aircraft wing. ESO is a heuristic, grund-based, topology optimization method, and can be employed as a powerful and robust design tool. It can be used to optimize for a large number of objectives, including those based on stress, stiffness, frequency and heat. However, as ESO is inheritantly suited to the optimization of continuum-based models, like other topology optimization methods it is unsuited to discretized, multicomponent structures. Although an arrangement of components may be 'interpreted' from a topology, the results of such an interpretation may often not be feasible from a manufacturing standpoint. Group ESO was recently conceived as a modification of the ESO method that allows it to optimize multi-component structures. Group ESO can be used effectively to constrain the ESO method to only produce manufacturable results. This method can find the optimal number of structural members in a model and is capable of finding the optimal location of those components. In addition, the size of the structural members, such as the thickness or height can also be optimized. In other words, GESO offers a means of finding the optimal configuration of components. The implementation of GESO requires the user to input a set of allowable sizes and also a 'search domain' of possible locations for each structural member. This search domain of possible locations may be based on what would provide best 'coverage'. In this case, the user would allow for a possible location at evently spaced intervals across the design domain in an unbiased fashion. Alternatively, the search space may be 'biased' by allowing for more possible locations in areas that are expected to be reinforced.
Aircraft wing design automation with ESO and GESO
Entwurfsautomatisierung von Flugzeug-Tragflächen mit Hilfe von ESO- und GESO-Verfahren
International Journal of Vehicle Design ; 28 , 4 ; 356-369
2002
14 Seiten, 16 Bilder, 2 Tabellen, 8 Quellen
Aufsatz (Zeitschrift)
Englisch
Aircraft wing design automation with ESO and GESO
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