Effect of marine growth on vortex shedding and the fatigue life of tubular members. Results from a case study

Julian Wolfram

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Current design practice is to use Morison's equation for the prediction of forces on nominally rigid tubular members of offshore structures and to assume that vortex shedding induced transverse forces are not sufficiently coherent over the whole span of a tubular to warrant separate attention. Recent experiments on marine and artifically roughened cylinders show large vortex shedding induced lift forces which have a hight degree of spanwise coherence. The paper shows, through a case study, that in some circumstances the combination of the inline force and the lift force produces a resultant much larger than the Morison force above and an even greater increase in cumulative fatigue damage.

    Original languageEnglish
    Title of host publicationProceedings of the First International Offshore and Polar Engineering Conference
    Pages362-369
    Number of pages8
    Publication statusPublished - 1991
    Event1st International Offshore and Polar Engineering Conference 1991 - Edinburgh, Scotl
    Duration: 11 Aug 199116 Aug 1991

    Conference

    Conference1st International Offshore and Polar Engineering Conference 1991
    CityEdinburgh, Scotl
    Period11/08/9116/08/91

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