A steel riser has benefits over a flexible riser in terms of pressure rating and cost. A steel riser in lazy wave configuration (steel lazy wave riser (SLWR)) is often considered as a good alternative solution for harsh environments where large floater excursions take place. The SLWR configuration is achieved by introducing buoyancy modules into a steel catenary riser (SCR). The buoyancy modules act as a damper and isolate the floater motions from the critical touchdown area. Hence, the SLWR generally has better overall performance than an SCR configuration. This paper attempts to analyze the correlation between the geometric shapes of the SLWR configuration with its capability to absorb the dynamic loadings. For deepwater cases, the behavior of the bottom part of the riser is correlated with the velocity experiences at the riser's hang-off location. Hence, the riser's performance is analyzed by comparing the velocity at the riser's hang-off with the velocity at the sag, hog, and near touchdown. The geometric shape of an SLWR is represented by its arch height, which is the vertical distance between the lowest point at the sag and the highest point at the hog bend of a riser. The results show that there is a correlation between the arch height of an SLWR with the riser's strength and wave-induced fatigue performance. SLWR configurations with higher arch generally have greater capability to absorb the dynamic loadings, as indicated by the lower velocities along the riser, which leads to lower stress utilizations and lower fatigue damage.
Skip Nav Destination
Article navigation
February 2017
Research-Article
Review of Steel Lazy Wave Riser Concepts for the North Sea
Airindy Felisita,
Airindy Felisita
Department of Mechanical Engineering
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: airindy.felisita@uis.no
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: airindy.felisita@uis.no
Search for other works by this author on:
Ove Tobias Gudmestad,
Ove Tobias Gudmestad
Department of Mechanical Engineering
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: ove.t.gudmestad@uis.no
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: ove.t.gudmestad@uis.no
Search for other works by this author on:
Daniel Karunakaran,
Daniel Karunakaran
Department of Mechanical Engineering
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: daniel.karunakaran@uis.no
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: daniel.karunakaran@uis.no
Search for other works by this author on:
Lars Olav Martinsen
Lars Olav Martinsen
Search for other works by this author on:
Airindy Felisita
Department of Mechanical Engineering
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: airindy.felisita@uis.no
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: airindy.felisita@uis.no
Ove Tobias Gudmestad
Department of Mechanical Engineering
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: ove.t.gudmestad@uis.no
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: ove.t.gudmestad@uis.no
Daniel Karunakaran
Department of Mechanical Engineering
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: daniel.karunakaran@uis.no
and Materials Science,
University of Stavanger,
Stavanger N-4036, Norway
e-mail: daniel.karunakaran@uis.no
Lars Olav Martinsen
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received May 21, 2015; final manuscript received September 15, 2016; published online October 20, 2016. Assoc. Editor: Robert Seah.
J. Offshore Mech. Arct. Eng. Feb 2017, 139(1): 011702 (15 pages)
Published Online: October 20, 2016
Article history
Received:
May 21, 2015
Revised:
September 15, 2016
Citation
Felisita, A., Tobias Gudmestad, O., Karunakaran, D., and Olav Martinsen, L. (October 20, 2016). "Review of Steel Lazy Wave Riser Concepts for the North Sea." ASME. J. Offshore Mech. Arct. Eng. February 2017; 139(1): 011702. https://doi.org/10.1115/1.4034822
Download citation file:
Get Email Alerts
Numerical Modeling of Fish Cage Structural Responses in Regular and Irregular Waves Using Modified XPBD
J. Offshore Mech. Arct. Eng (April 2025)
Layout Optimization of Wave Energy Park Based on Multi-Objective Optimization Algorithm
J. Offshore Mech. Arct. Eng (August 2025)
Effects of Aerodynamic Damping and Gyroscopic Moments on Dynamic Responses of a Semi-Submersible Floating Vertical Axis Wind Turbine: An Experimental Study
J. Offshore Mech. Arct. Eng (April 2025)
Investigating the Impact of System Parameters on Flow-Induced Vibration Hard Galloping Based on Deep Neural Network
J. Offshore Mech. Arct. Eng (August 2025)
Related Articles
Dynamic Asynchronous Coupled Analysis and Experimental Study for a Turret Moored FPSO in Random Seas
J. Offshore Mech. Arct. Eng (August,2015)
New Methodology for the Determination of the Vertical Center of Gravity of In-Service Semisubmersibles: Proposal and Numerical Assessment
J. Offshore Mech. Arct. Eng (August,2017)
Drilling Riser Model Test for Software Verification
J. Offshore Mech. Arct. Eng (February,2018)
Modeling Approach of Hydropneumatic Tensioner for Top-Tensioned Riser
J. Offshore Mech. Arct. Eng (October,2018)
Related Proceedings Papers
Related Chapters
Production Riser Life Extension – A Class Perspective
Ageing and Life Extension of Offshore Facilities
Going beyond Leadership
Global Management Strategies: Sales, Design, Manufacturing & Operations (The Technical Manager's Survival Guides)
Trademarks and Service Marks
Intellectual Property: A Guide for Engineers