Publicação: Hybrid-electric aircraft: conceptual design, structural and aeroelastic analyses
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CNPQ::ENGENHARIAS::ENGENHARIA AEROESPACIAL::ESTRUTURAS AEROESPACIAIS
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This work presents the conceptual design of two hybrid aircrafts (four and six
passengers) and the structural and aeroelastic analyses for the wing and empennages. The
requirements in the conceptual phase were established by the aeronautical design
competition held annually by the American Institute of Aeronautics and Astronautics
(AIAA). The initial characteristics and geometries of a conventional aircraft were
estimated through the study of historical trends. Then, the hybridization characteristics
were evaluated using the series architecture, which affects mainly the range equations and
the definition of the propulsive system elements that better fit the project, e. g., the internal
combustion engine and batteries. To explore the multidisciplinary characteristics of the
aircraft development, it was implemented an optimization procedure based on a genetic
algorithm fully integrated with an aerodynamic module with performance and stability
constraints, searching for the best values of the geometrical design variables. After
finishing the conceptual design, the structural evaluation of wing and empennages
(horizontal and vertical) was performed considering only static loads, but the failure index
and the buckling instability were checked. The evaluated loads were extracted from
aerodynamic models at the extreme conditions of flight envelope presented in V-n
diagrams. First, the structural components were defined in aluminum 7050-T651 and later
using composite material, specifically the carbon-epoxy Hexcel 8552 NMS 128/2.
Additionally, only the aeroelastic analysis for the wing was evaluated, because in this
work the fuselage analysis wasn't done. The results showed no flutter speed and no
divergence phenomena within the aircraft's flight envelope, which is justified by the
torsional rigidity obtained in the main box structure.
Abstract
Palavras-chave
Aeronautical Design, Hybrid Aircraft, Optimization, Aerodynamic Loads, Aeronautical structures, Aeroelasticity, Projeto Aeronáutico, Aeronave híbrida, Otimização, Cargas Aerodinâmicas, Estruturas Aeronáuticas, Aeroelasticidade
Citação
SILVA, Higor Luis, GIL, Alexandre Acerra. Hybrid-electric aircraft: conceptual design, structural
and aeroelastic analyses. 2017. 123 f. Trabalho de Conclusão de Curso (Graduação em Engenharia Aeronáutica) - Universidade Federal de Uberlândia, Uberlândia, 2017.