Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
AN ANALYTICAL-BASED OPTIMIZATION APPROACH TO PRELIMINARY WEIGHT SIZING OF AIRCRAFT WINGS
Submission Author:
Alexandre Acerra Gil , SP
Co-Authors:
Alexandre Acerra Gil, Thiago Guimaraes
Presenter: Alexandre Acerra Gil
doi://10.26678/ABCM.COBEM2019.COB2019-0694
Abstract
This work presents the development of an analytical-based optimization approach capable of performing a preliminary weight sizing of aircraft wings during the conceptual or preliminary design phases. Analytical methods were used in order to generate a faster calculation logic when compared with the numerical simulations adopted during more advanced design phases. Aerodynamic formulations allowed the estimation of the lift coefficient and its transformation into a two-dimensional spanwise load distribution. As the wing box structure is highly complex for the application of analytic equations, simplifications had to be applied to idealize the structure. With the loads and the idealized structure, the normal stresses and shear flow could be calculated. Design criteria were then applied to verify if the structure would be able to withstand the applied loads. Finally, this calculation routine was introduced in an optimization algorithm to find the lowest possible weight wing configuration, creating the basis of a sizing tool. The validation was performed by comparing the sizing responses with numerical simulations using the finite element method.
Keywords
aeronautical design, structure optimization, preliminary weight sizing, aircraft wing, analytical method
