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Proceedings Papers

Advanced Pipeline Impact Design

Ragnar T. Igland, Hagbart S. Alsos, Stig Olav Kvarme
Proc. ASME. OMAE2016, Volume 5: Pipelines, Risers, and Subsea Systems, V005T04A041, June 19–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2016-54855
https://doi.org/10.1115/OMAE2016-54855
View Paper titled, Advanced Pipeline Impact Design
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Topics: Design, Pipelines, Damage, Deformation, Energy dissipation, Kinetic energy, Ocean engineering, Coating processes, Coatings, Deflection
Proceedings Papers

Evaluation of Pipeline Impact Damage

Hagbart S. Alsos, Ragnar T. Igland, Tore H. Søreide
Proc. ASME. OMAE2012, Volume 3: Pipeline and Riser Technology, 717-723, July 1–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2012-83859
https://doi.org/10.1115/OMAE2012-83859
View Paper titled, Evaluation of Pipeline Impact Damage
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Topics: Damage, Pipelines, Deformation, Kinetic energy, Ocean engineering, Deflection, Design, Energy dissipation, Finite element analysis, Piping design
Proceedings Papers

Using ECA in Structural Integrity of Submarine Pipelines for Optimalization of Intervention Work

Ragnar T. Igland, Trond Lamvik
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5, Parts A and B, 387-393, June 6–11, 2010
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2010-20349
https://doi.org/10.1115/OMAE2010-20349
View Paper titled, Using ECA in Structural Integrity of Submarine Pipelines for Optimalization of Intervention Work
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Topics: Underwater pipelines, Stress, Design, Fatigue, Gears, Membranes, Acceptance criteria, Arches, Bearings, Deformation
Proceedings Papers

Expansion Design Philosophy to Prevent Buckle Walking at Very Uneven Seabed

Ragnar T. Igland, Marit Irene Kvittem, Dmitry Vysochinskiy
Proc. ASME. OMAE2009, Volume 3: Pipeline and Riser Technology, 243-248, May 31–June 5, 2009
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2009-79363
https://doi.org/10.1115/OMAE2009-79363
View Paper titled, Expansion Design Philosophy to Prevent Buckle Walking at Very Uneven Seabed
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Topics: Design, Seabed, Buckling, Friction, Pipelines, Rocks, Ocean engineering, Cycles, Displacement, Manifolds
Proceedings Papers

Advanced Pipeline Trawl Gear Impact Design

Ragnar T. Igland, Tore So̸reide
Proc. ASME. OMAE2008, Volume 3: Pipeline and Riser Technology; Ocean Space Utilization, 271-277, June 15–20, 2008
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2008-57354
https://doi.org/10.1115/OMAE2008-57354
View Paper titled, Advanced Pipeline Trawl Gear Impact Design
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Topics: Design, Gears, Pipelines, Finite element analysis, Stress, Pipes, Seabed, Soil, Weight (Mass), Computer software
Proceedings Papers

Fatigue Safety Factors for the Tensile and Pressure Armours of Flexible Risers

Bernt J. Leira, Ragnar T. Igland, Naiquan Ye, Elizabeth A. Passano
Proc. ASME. OMAE2007, Volume 2: Structures, Safety and Reliability; Petroleum Technology Symposium, 323-329, June 10–15, 2007
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2007-29486
https://doi.org/10.1115/OMAE2007-29486
View Paper titled, Fatigue Safety Factors for the Tensile and Pressure Armours of Flexible Risers
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Topics: Fatigue, Flexible risers, Pressure, Safety, Electromagnetic scattering, Event history analysis, Reliability, Waves
Proceedings Papers

Calibration of a Flexible Pipe Tensile Armour Stress Model Based on Fibre Optic Monitoring

Svein Sævik, Ragnar T. Igland
Proc. ASME. OMAE2002, 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 3, 53-58, June 23–28, 2002
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2002-28092
https://doi.org/10.1115/OMAE2002-28092
View Paper titled, Calibration of a Flexible Pipe Tensile Armour Stress Model Based on Fibre Optic Monitoring
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Topics: Armor, Calibration, Fibers, Pipes, Stress, Fiber Bragg gratings, Sensors, Bending (Stress), Computers, Flexible risers
Proceedings Papers

Comparison of Simulated and Measured Wind Forces on Offshore Tower Structure

Arve Bjo̸rset, Bernt J. Leira, Ragnar T. Igland
Proc. ASME. OMAE2003, Volume 1: Offshore Technology; Ocean Space Utilization, 673-678, June 8–13, 2003
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2003-37474
https://doi.org/10.1115/OMAE2003-37474
View Paper titled, Comparison of Simulated and Measured Wind Forces on Offshore Tower Structure
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Topics: Ocean engineering, Wind, Drag (Fluid dynamics), Computers, Bracing (Construction), Computational fluid dynamics, Computer simulation, Design, Flow (Dynamics), Offshore platforms
Proceedings Papers

Fatigue Safety Factors for Flexible Risers Based on Case Specific Reliability Analysis

Bernt J. Leira, Ragnar T. Igland, Gro S. Baarholm, Knut A. Farnes, Dick Percy
Proc. ASME. OMAE2005, 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 2, 211-217, June 12–17, 2005
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2005-67432
https://doi.org/10.1115/OMAE2005-67432
View Paper titled, Fatigue Safety Factors for Flexible Risers Based on Case Specific Reliability Analysis
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Topics: Event history analysis, Fatigue, Flexible risers, Safety, Electromagnetic scattering, Reliability, Waves
Journal Articles

Reliability Analysis of Pipelines During Laying, Considering Ultimate Strength Under Combined Loads

Ragnar T. Igland, Torgeir Moan
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. February 2000, 122(1): 40–46.
https://doi.org/10.1115/1.533722
Published Online: November 18, 1999
View Article titled, Reliability Analysis of Pipelines During Laying, Considering Ultimate Strength Under Combined Loads
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Topics: Design, Pipelines, Stress, Tension, Calibration, Uncertainty, Collapse, Failure, Probability