The modal approach, which is normally used in analysis and optimization with dynamic aeroelastic considerations, is extended here to deal with static aeroelastic maneuver trim equations, loads and stresses. Reduced-size static equilibrium equations, where a subset of low-frequency vibration modes of a baseline structure is used as generalized coordinates, are formulated such that they can be used for modified structures with-out changing the coordinates. These expressions, and their derivatives with respect to structural design variables are investigated in comparison with full-size finite-element solutions. A new method, which uses modal stress perturbations of the baseline structure to predict stresses in the modified ones, is developed. The modal-pertubation approach facilitates high-accuracy computations of stress sensitivities without increasing the model size. The presented formulation facilitate an efficient inclusion of stress and loads considerations in on-line aeroservoelastic optimal design schemes.


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    Titel :

    Stress considerations in reduced-size aeroelastic optimization


    Weitere Titelangaben:

    Belastungsbetrachtungen bei aeroelastischen Optimierungen im Modellmaßstab


    Beteiligte:
    Karpel, M. (Autor:in) / Brainin, L. (Autor:in)


    Erscheinungsdatum :

    1994


    Format / Umfang :

    10 Seiten, 11 Bilder, 1 Tabelle, 4 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Stress considerations in reduced-size aeroelastic optimization

    Karpel, Mordehai / Brainin, Lior | AIAA | 1995


    Stress considerations in reduced-size aeroelastic optimization

    Karpel, Mordehai / Brainin, Lior | AIAA | 1994


    Static Aeroelastic Considerations

    Lomax, Ted L. | AIAA | 1996