This paper proposes a framework for the design optimization of geometric nonlinearities developed by active elements embedded in prestressable, statically indeterminant, truss-like aerospace structures for the purpose of attenuating their dynamic aeroelastic response under turbulent aerodynamic gust conditions. Dynamic aeroelastic responses are analyzed considering random power spectral density (PSD) gust with a continuous Davenport spectrum (DS) and tuned discrete gust (TDG) with a one-minus-cosine (OMC) wind excitation profiles. A genetic optimization algorithm (GA) is utilized to determine optimal prestress values through active element actuations for the purpose of tuning the geometric stiffness and, therefore, the modal response of the structure when exposed to gust excitations. In addition, a new simplified control metric for comparing active member locations is proposed. A case study is analyzed with this methodology to minimize the pointing error of a simplified antenna structure. Pointing error attenuations of 22.1% and 17.0% were found for the structure under DS mean wind speeds of 889 (349.95) and 2,778  cm/s (1,093.61  in./s), respectively. Using the same two operating cases with the TDG excitation profile resulted in the overall pointing error to be reduced by 36.8% and 37.0%, respectively. The adaptive nature of the presented methodology allows a single actuator layout to mitigate structural response for a variety of load cases, which is a large benefit over many traditionally passive techniques. This paper expands the existing usage of geometric nonlinearities to determine optimal active element location and actuations for given optimization objectives under realistic environmental loading conditions.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Dynamic Aeroelastic Performance Optimization of Adaptive Aerospace Structures Using Structural Geometric Nonlinearities


    Weitere Titelangaben:

    J. Aerosp. Eng.


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    01.11.2022




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Vibration Testing of Aeroelastic Structures Containing Geometric Stiffness Nonlinearities

    Charmbalis, G. / Cooper, J.E. / Londono, J. et al. | British Library Conference Proceedings | 2013



    Quasi-Steady Aeroelastic Analysis of the Semi-Aeroelastic Hinge Including Geometric Nonlinearities

    Conti, Claudio / Saltari, Francesco / Mastroddi, Franco et al. | AIAA | 2021


    Unsteady Aeroelastic Analysis of the Semi Aeroelastic Hinge Including Local Geometric Nonlinearities

    Mastracci, Paolo / Saltari, Francesco / Mastroddi, Franco et al. | AIAA | 2022