New conceptual design of aeroelastic wing structures by multi-objective optimization

Author: Sleesongsom S.   Bureerat S.  

Publisher: Taylor & Francis Ltd

ISSN: 0305-215X

Source: Engineering Optimization, Vol.45, Iss.1, 2013-01, pp. : 107-122

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Abstract

Internal structural layouts and component sizes of aircraft wing structures have a significant impact on aircraft performance such as aeroelastic characteristics and mass. This work presents an approach to achieve simultaneous partial topology and sizing optimization of a three-dimensional wing-box structure. A multi-objective optimization problem is assigned to optimize lift effectiveness, buckling factor and mass of a structure. Design constraints include divergence and flutter speeds, buckling factor and stresses. The topology and sizing design variables for wing internal components are based on a ground element approach. The design problem is solved by multi-objective population-based incremental learning (MOPBIL). The Pareto optimum results lead to unconventional wing structures that are superior to their conventional counterparts.