This paper examines the dynamic behaviors of inflated beam aerospace structures. The principal foci of this investigation are the determination of the damping mechanisms active in strutures constructed from inflated cylindrical beams, development of a practical modeling method for complex structures, and an examination of the difficulties in predicting on-orbit dynamic behavior from ground tests. A Euler-Bernoulli model of the inflated beam is used to determine distributed damping coefficients from modal tests. The results show that the viscous damping in the inflated beam is independent of beam pressure, but that the pressurization stress levels in the beam fabric affect the strain-rate damping. The Euler-Bernoulli inflated beam model is used in conjunction with a conventional finite element package to model the dynamic behavior of a complex inflated beam structure, a 1.7-m-diam inflated dish antenna mockup. The model accurately predicts the lower natural frequencies of the dish structure. A comparison of modal tests of inflated beam structures performed both in the near weightlessness of the NASA KC-135 low gravity simulator aircraft and in a ground laboratory demonstrates that gravity level can have a dramatic effect on system damping.


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    Titel :

    Dynamic analysis of space-based inflated beam structures


    Weitere Titelangaben:

    Dynamische Untersuchung von weltraumgestützten aufgepumpten Trägerstrukturen


    Beteiligte:
    Main, J.A. (Autor:in) / Carlin, R.A. (Autor:in) / Garcia, E. (Autor:in) / Peterson, S.W. (Autor:in) / Strauss, A.M. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1995


    Format / Umfang :

    11 Seiten, 14 Bilder, 3 Tabellen, 24 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    CONCENTRATED LOADS ON INFLATED STRUCTURES

    DONNELL, L. H. | AIAA | 1963


    An Investigation of Geometric Imperfections in Parabolic Inflated Space Structures

    Naboulsi, S. / Palazotto, A. / American Institute of Aeronautics and Astronautics et al. | British Library Conference Proceedings | 2000



    INFLATED TYRE

    KAVAKAMI JUKI | Europäisches Patentamt | 2015

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