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Experimental and numerical studies of inclined cables: free and parametrically-forced vibrations

Rega, G. and Srinil, N. and Alaggio, R. (2008) Experimental and numerical studies of inclined cables: free and parametrically-forced vibrations. Journal of Theoretical and Applied Mechanics, 46 (3). pp. 621-640. ISSN 1429-2955

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    Abstract

    Because of few experimental studies in the inclined cable literature, this paper is aimed at experimental modelling and investigating the linear free and nonlinear forced vibrations of sagged inclined cables, by discussing the relevant outcomes in the background of theoretical and numerical achievements. Attention is paid to the identification of cable hybrid modes due to system asymmetry, which gives rise to an avoidance phenomenon in the natural frequency spectrum, and to the investigation of some typical 3-D nonlinear dynamics involving the simultaneous parametric/external excitation due to a harmonically time-varying support movement. Large-amplitude out-of-plane/in-plane multi-modal interactions due to non-planar/planar internal resonances are experimentally observed and complemented by space-time numerical simulation of the associated, geometrically nonlinear, partial-differential equations of parametrically-forced cable motion. Overall, the experimental and numerical results highlight the fundamental linear/nonlinear dynamic characteristics of inclined cables, and the crucial role played by the asymmetry induced by cable inclination, in addition to the significant effects of cable sag and dynamic extensibility.

    Item type: Article
    ID code: 18551
    Keywords: Inclined cable, Frequency avoidance, Hybrid modes, Parametric resonance, Experimental dynamics, Numerical simulation, Engineering (General). Civil engineering (General), Mathematics(all)
    Subjects: Technology > Engineering (General). Civil engineering (General)
    Department: Faculty of Engineering > Naval Architecture and Marine Engineering
    Related URLs:
      Depositing user: Dr Narakorn Srinil
      Date Deposited: 05 Apr 2010 11:42
      Last modified: 05 Sep 2014 13:12
      URI: http://strathprints.strath.ac.uk/id/eprint/18551

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