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.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Dynamic analysis of space-based inflated beam structures


    Additional title:

    Dynamische Untersuchung von weltraumgestützten aufgepumpten Trägerstrukturen


    Contributors:
    Main, J.A. (author) / Carlin, R.A. (author) / Garcia, E. (author) / Peterson, S.W. (author) / Strauss, A.M. (author)

    Published in:

    Publication date :

    1995


    Size :

    11 Seiten, 14 Bilder, 3 Tabellen, 24 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    FOAM INFLATED RIGIDIZED STRUCTURES FOR SPACE APPLICATIONS

    Lester, D. M. / Warner, M. J. / Blair, M. et al. | British Library Conference Proceedings | 1993


    Air-Inflated Fabric Structures

    P. V. Cavallaro / A. M. Sadegh | NTIS | 2006


    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