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.
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 language | English |
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Qualification | Doctor of Philosophy |
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Award date | 27 Mar 2018 |
DOIs | |
Publication status | Unpublished - 2018 |