Study on Integrated Model of SCR-Spar System Affected by Soil Suction

Abstract:

Based on the theory of a slender rod with bending stiffness, Steel Catenary Riser (SCR) is modeled as a small extensible cable. Considering the factors of Spar motion and soil interaction, coupled dynamic analysis for SCR-Spar in time domain is developed using the program developed from a cable dynamic analysis computer code CABLE3D. The paper focuses on the effect of soil suction on dynamic response, tension and bending moment obtained from modified program at key zone of SCR. The results indicate that riser flexural rigidity and soil suction play important roles on affecting the dynamic curvature at the Touch Down Zone (TDZ).

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 2807-2813
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.2807
• Online since: May 2011
• Authors: Xing Lan Bai, Ruo Chen Gao
• Keywords: Deepwater Exploration, Deepwater Riser, Flowline, Integrated Model, Soil Interaction, Soil Suction, Steel Catenary Riser

References

[1] Hushuan Wang and Doreen Chin (2001). "Challenges in Deepwater Riser System Design and Analysis," Int J Pipes and Pipelines International 46(3): 5-14 (2001).

[2] Pesce C.P. and Martins C.A.. "Riser-Soil Interaction: Local Dynamics at TDP a Discussionon the Eigenvalue Problem," Proceedings of Offshore Mechanics and Arctic Engineering, OMAE2004-51268: 583-594 (2004).

DOI: 10.1115/omae2004-51268

[3] Bernt J.Leira, Elizabeth Passano. "Analysis guidelines and application of a riser-soil interaction model including trench effects," Proceedings of Offshore Mechanics and Arctic Engineering, OMAE2004-51527: 955-961 (2004).

DOI: 10.1115/omae2004-51527

[4] Garrett DL. Dynamic analysis of slender rods. J Energy Research Technology, Transaction of ASME, 104: 302-307 (1982).

[5] Ma, W., Webster, W.C. An Analytical Approach to cable Dynamics: Theory and User Manual. SEA GRANT PROJECT R/OE-26 (1994).

[6] Chen XiaoHong. "Studies on dynamic interaction betweendeep-water floating structures and their mooring/tendon systems"[D], Ocean Engineering, Texas A&M University(200).

[7] Bridge Chirstopher, Willis Neil. "Steel catenary riser-results and conclusions from large scall simulations of seabed interaction" 14th Annual Conference Deep Offshore Technology (2002).

[8] Dong Yanqiu. "Wave Loads and Response of the Oil-Extraction Platform in Deep Ocean," TianJin University Press (2005).

[9] Ran, Z., Kim, M. H.. "Nonlinear Coupled Response of a Tethered Spar Platform in Waves," Int J Offshore and Polar Eng., ISOPE, 7(2): 111-118 (1997).

[10] Ran, Z., Kim, M. H., Zheng, W.. "Coupled Dynamic Analysis of a Moored Spar in Random Waves and Currents (Time Domain vs. Frequency Domain Analysis)," Journal of Offshore Mechanics and Arctic Engineering, 121: 194-200 (1999).

DOI: 10.1115/1.2829565

[11] Spanos Pol D., Rupak Ghoch, etc. Coupled analysis of a Spar structure: Monte Carlo and statistical linearization solution. Journal of Offshore Mechanics and Arctic Engineering, 127: 11-16 (2005).

DOI: 10.1115/1.1862253

[12] Oguz Yilmaz. "Hydrodynamic Interactions of Waves with Group of Truncated Vertical Cylinders," J Waterway, Port, Coastal and Ocean Engineering, 124(5): 272-279 (1999).

DOI: 10.1061/(asce)0733-950x(1998)124:5(272)

[13] Zhang Fan, Yang Jianmin, Li Runpei. "A Review on the Technical Development of Spar Platform," J China Offshore Platform, 20(2): 6-11 (2005).

[14] Bridge Chirstophher, Laver Katherine, Ed Clukey, Trevor Evans. Steel catenary riser touchdown point vertical interaction models. Int J Offshore Technology Conference, OTC 16628 (2004).

DOI: 10.4043/16628-ms

[15] Lindahl, L., Sjöberg, A. Dynamic analysis of mooring cables. The Second International Symposium on Ocean Engineering and Ship and Handling, Gothenburg, Sweden, pp.281-319 (1983).