000021569 001__ 21569
000021569 005__ 20170622131252.0
000021569 04107 $$aeng
000021569 046__ $$k2017-06-15
000021569 100__ $$aBerci, Marco
000021569 24500 $$aSEMI-ANALYTICAL REDUCED-ORDER MODELS FOR THE AEROELASTIC BEHAVIOR OF SUBSONIC FLEXIBLE WINGS VIA GENERALISED PLATE AND BEAM FORMULATIONS

000021569 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021569 260__ $$bNational Technical University of Athens, 2017
000021569 506__ $$arestricted
000021569 520__ $$2eng$$aSemi-analytical reduced-order models for the combined aeroelastic analysis and gust response of flexible subsonic wings with arbitrary aspect ratio are presented. Both a thin plate and a slender beam are considered as the linear structural dynamics models, within a generalised formulation. A modified strip theory is proposed for modelling the wing unsteady aerodynamics in incompressible flow, accounting for the three-dimensional effects on both spanwise decay and build-up of the airload. Peters’ in-flow theory is adopted for calculating the two-dimensional unsteady airload around each morphing wing section, standard and tuned strip theories being readily resumed for comparison and completeness. Considering straight elliptical and trapezoidal planforms, approximate lift-deficiency functions for both a unit step-change in the angle of attack and a unit sharp-edged gust are then employed in place of classic Theodorsen/Wagner’s and Sears/Kussner’s functions, respectively. A modal approach is finally adopted to write the generalised equations of motion in state-space form, for both plate-based and beam-based formulations. Numerical results are then obtained and critically discussed for the aeroelastic stability analysis of a uniform rectangular wing, with respect relevant aerodynamic and structural parameters. Due to computational efficiency and theoretical insight, the proposed generalised formulation is suggested as an effective aeroelastic tool for the preliminary multidisciplinary design and optimisation (MDO) of flexible wings in the low-subsonic regime, as characterised by incompressible flow.

000021569 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021569 653__ $$areduced-order models, semi-analytical, aeroelasticity, subsonic flexible wings.

000021569 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021569 720__ $$aBerci, Marco
000021569 8560_ $$ffischerc@itam.cas.cz
000021569 8564_ $$s1033408$$uhttps://invenio.itam.cas.cz/record/21569/files/17045.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS12] Advances in model reduction techniques in structural and multi-physics dynamical systems
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000021569 962__ $$r21500
000021569 980__ $$aPAPER