Aeroelastic Model Corrections of a Very Light Aircraft; Implications on Static Trim, Flutter and Gust Response

Demirer G., Kayran A.

AIAA AVIATION 2022 Forum, Illinois, United States Of America, 27 June - 01 July 2022 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.2514/6.2022-3597
  • City: Illinois
  • Country: United States Of America
  • Middle East Technical University Affiliated: Yes


© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.This paper discusses the aeroelastic model corrections employed in the static and dynamic aeroelastic analysis of a very light aircraft. MSC.FlightLoads and MSC.Nastran are used for aeroelastic modeling and analysis. Discussion covers improvement of the aerodynamic solution, aerodynamic modeling approaches and aero-structure coupling alternatives. Aerodynamic calculations are based on the Doublet-Lattice Method (DLM). The aerodynamic solution is improved by including the camber and the angle of incidence of the wing through the addition of initial downwash. DLM-based loads are compared with loads obtained from computational fluid dynamics (CFD) analysis. Additionally, the effect of actuator stiffness is discussed, and different aeroelastic modeling alternatives, such as connecting the wings with a lifting panel, whether or not to couple the wing-bridging plate with the structural model are compared. The effects of aeroelastic model corrections on static trim, flutter and gust response solutions are investigated.