Numerical modelling of seabed trench and its effect on the structural response of steel catenary risers

Jiayue Liu

    Research output: ThesisDoctoral Thesis

    172 Downloads (Pure)

    Abstract

    The thesis addresses numerical modelling of trenches in the touchdown zone of steel catenary risers (SCRs) and trench
    effects on the structural response of the riser. A numerical framework for SCR analysis is developed to simulate nonlinear soil
    behaviour during riser-soil interaction. Consistent gradual trench development and pre-formed trench modelling procedures are
    proposed and trench effects are evaluated through extensive quasi-static and dynamic simulations. The effect of a trench on the SCR structural response was found to vary with the trench geometry, generally reducing the SCR fatigue life except for deep
    trenches with a compatible shape to the riser profile.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • The University of Western Australia
    Supervisors/Advisors
    • Kimiaei, Mehrdad, Supervisor
    • Randolph, Mark, Supervisor
    Thesis sponsors
    Award date27 Mar 2018
    DOIs
    Publication statusUnpublished - 2018

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