Projects per year
Abstract
This paper reports the effect of the global behaviour of three-legged jack-up rigs due to the reinstallation of spudcan footings next to seabed footprints. Two reinstallation scenarios are discussed: (i) two legs first installed on flat ground, and then the third leg installed near a footprint (representing what is known as leg-by-leg preloading); and (ii) the three legs installed simultaneously (representing simultaneous preloading). The spudcan-soil interaction was simulated using a coupled Eulerian-Lagrangian (CEL) approach. A simplified global jack-up model was developed by considering an equivalent beam model for the hull and legs. The results of the jack-up installations are compared against the responses of the more common modelling of a spudcan with a fixed head condition. A detailed parametric study assessing the consequences of spudcan-footprint interactions, such as the risk of the jack-up and spudcan sliding towards the footprint centre, overturning of the jack-up rig and of structural failure of the jack-up leg due to excessive stresses, is also discussed. The ability of a recently developed novel spudcan with a flat base and 4 holes, coupled with the global jack-up model, to mitigate the consequences of spudcan-footprint interactions is highlighted.
Original language | English |
---|---|
Pages (from-to) | 421-441 |
Number of pages | 21 |
Journal | Marine Structures |
Volume | 64 |
Early online date | 28 Dec 2018 |
DOIs | |
Publication status | Published - 1 Mar 2019 |
Fingerprint Dive into the research topics of 'Global jack-up rig behaviour next to a footprint'. Together they form a unique fingerprint.
Projects
- 1 Finished
-
Investigation of Alternative Footing Shapes to Mitigate Instabilities During Installation of Offshore Drilling Platforms
Hossain, M., Cassidy, M., Hu, Y., Won, J., Park, J. & Kim, S.
Australian Research Council, Daewoo Shipbuilding and Marine Engineering
1/01/14 → 31/12/17
Project: Research