Dynamic response of steel catenary riser using a seabed interaction under random loads

It is important to develop better understanding of the Steel Catenary Riser (SCR)–soil interaction mechanism to provide a realistic technique to predict the dynamic response and structural behavior of the SCR in the Touchdown Zone (TDZ). This paper discusses the significance of SCR–seabed interaction in the design of SCR for deepwater applications and reports the results of an analysis of an SCR on soft clay in 910 m depth of water using the commercial code OrcaFlex for non-linear time domain simulation with a robust meshing technique. In the study reported in this paper, the vertical embedment and large lateral movements of the SCR in the TDZ were investigated. During the simulations the seabed has been modeled using a hysteretic non-linear model in vertical seabed direction, and bilinear and trilinear models in the lateral seabed direction. It has been found that the TDZ responses result in the degradation of the seabed soil stiffness due to cyclic loading. Furthermore, an improved SCR–soil interaction model, with accurate prediction of soil stiffness and riser penetration enables us to more accurately predict global riser dynamic performance in the TDZ.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2013.05.022
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0029801813002035
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• Authors:
  • Elosta, Hany
  • Huang, Shan
  • Incecik, Atilla
• Publication Date: 2013-9-1

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 34-43
• Serial:
  • Ocean Engineering
  • Volume: 69
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Case studies; Ocean bottom; Ocean engineering; Semisubmersibles; Soft clays
• Subject Areas: Marine Transportation; Pipelines; Terminals and Facilities; Vehicles and Equipment; I42: Soil Mechanics;

Filing Info

• Accession Number: 01489182
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 2 2013 9:34AM