Fatigue performance of deepwater steel catenary riser considering nonlinear soil
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- Title
- Fatigue performance of deepwater steel catenary riser considering nonlinear soil
- Authors
- Kim, Y.T.; KIM, DO KYUN; Choi, H.S.; Yu, S.Y.; Park, K.S.
- Date Issued
- 2017-03
- Publisher
- Techno Press
- Abstract
- The touch down zone (TDZ) and top connection point of the vessel are most critical part of fatigue damage in the steel catenary riser (SCR). In general, the linear soil model has been used to evaluate fatigue performance of SCRs because it gives conservative results in the TDZ. However, the conservative linear soil model shows the limitation to accommodate real behavior in the TDZ as water depth is increased. Therefore, the riser behavior on soft clay seabed is investigated using a nonlinear soil model through time domain approach in this study. The numerical analysis considering various important parameters of the nonlinear soil model such as shear strength at mudline, shear strength gradient and suction resistance force is conducted to check the adoptability and applicability of nonlinear soil model for SCR design. ? 2017 Techno-Press, Ltd.
- Keywords
- Fatigue damage; Marine risers; Overhead lines; Soils; Deepwater steel catenary risers; Fatigue performance; Nonlinear soils; Steel catenary risers; Strength gradients; Time-domain approach; Touch Down Zone; Vortex induced vibration; Shear strength
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50491
- DOI
- 10.12989/sem.2017.61.6.737
- ISSN
- 1225-4568
- Article Type
- Article
- Citation
- Structural Engineering and Mechanics, vol. 61, no. 6, page. 737 - 746, 2017-03
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