On the multi-fidelity approach in surrogate-based multidisciplinary design optimisation of high-aspect-ratio wing aircraft

Date

2022

Authors

Lobo do Vale, José
Sohst, Martin
Crawford, Curran
Suleman, Afzal
Potter, G.
Banerjee, S.

Journal Title

Journal ISSN

Volume Title

Publisher

The Aeronautical Journal

Abstract

The reduction of computational costs in the context of the Multidisciplinary Design Optimisation of a typical medium-range aircraft was investigated through an assessment of active constraints and the use of multi-fidelity models-based estimation of drag and structural stress. The results show that for this problem, from the set of considered constraints that includes flutter boundary, the active constraint is a 2.5g pull up Maximum Take Off Weight. Results show that the multi-fidelity approach reduced the required high-fidelity aerodynamic number of evaluations, for both drag assessment and stress assessment with sufficient level of accuracy for the former and conservatively for the latter. Further computational cost reduction can be achieved using a surrogate model based Multidisciplinary Design Optimisation. The best configuration attained shows an Aspect Ratio increase of 16%, a reduction of 4.5% in fuel consumption and wing structural weight increase of 2.7% relative to a predefined baseline configuration.

Description

Keywords

MDO, Fluid Structure Interaction, Low vs High Fidelity

Citation

Lobo do Vale, J., Sohst, M., Crawford, C., Suleman, A., Potter, G., & Banerjee, S. (2022). “On the multi-fidelity approach in surrogate-based multidisciplinary design optimisation of high-aspect-ratio wing aircraft.” The Aeronautical Journal, 127(1307), 2-23. https://doi.org/10.1017/aer.2022.49