The behaviour of an axially pre-loaded cylindrical member of an offshore structure, hit by a supply ship, has been investigated. The effects of axial pre-loading on the dynamic properties of members, the extent of damage and propagation of dynamic instability in the tubular members have also been investigated. Numerical models have been validated using available experimental data from the literature although these are mostly static with no pre-loading. Axial preloading was found to change the dynamic characteristics of some cylindrical members quite dramatically while it had no significant effect on others. The study examined whether there was any change in the behaviour between local and global modes when the loading was dynamic rather than static. The effect of damping on the dynamic instability of axially preloaded tubes under lateral dynamic loads was also studied. It was observed that for some geometries the quasi-static response can be used to define the boundary between bounded and unbounded dynamic responses. The main contribution of this study, compared with previous investigations reported in the literature, is that both pre-loading and dynamic effects have been included.


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    Titel :

    Dynamic behaviour of axially pre-loaded tubular steel members of offshore structures subjected to impact damage


    Beteiligte:
    Zeinoddini, M. (Autor:in) / Harding, J.E. (Autor:in) / Parke, G.A.R. (Autor:in)

    Erschienen in:

    Ocean Engineering ; 26 , 10 ; 963-978


    Erscheinungsdatum :

    1999


    Format / Umfang :

    16 Seiten, 10 Bilder, 20 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch