Effect of inertial and constitutive properties on body-freedom flutter of a flying wing Conference

Richards, PW, Mardanpour, P, Herd, RA et al. (2013). Effect of inertial and constitutive properties on body-freedom flutter of a flying wing . 10.2514/6.2013-1840

cited authors

  • Richards, PW; Mardanpour, P; Herd, RA; Hodges, DH

authors

abstract

  • The class of high altitude long endurance (HALE) aircraft often have very slender wings with minimal structure. This leads to large trim deflections and coupling between the vehicle flight dynamics and wing vibrations. When this coupled behavior becomes unstable, it is referred to as body-freedom flutter (BFF). BFF behavior is dependent on the inertial and constitutive properties of the wing as well as the fuselage. This relationship is explored for a typical flying wing aircraft representative of the Horten IV flying wing using an efficient yet rigorous analysis that relies on geometrically-exact, fully intrinsic beam equations and a finite-state induced flow model, implemented in the computer code NATASHA (Non-linear Aeroelastic Trim and Stability of HALE Aircraft). The wing inertial and stiffness properties were calculated using a realistic representative section using the powerful section analysis tool VABS. Trade studies on the BFF behavior were performed by varying the fuselage properties and the internal wing structure and examining the effects on the flutter speed, flutter frequency, and flutter mode shape. © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

publication date

  • August 2, 2013

Digital Object Identifier (DOI)

International Standard Book Number (ISBN) 13