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Proceedings Papers

Empire Wind Model Tests - Wave Loads and Responses

Hagbart S. Alsos, Senthuran Ravinthrakumar, Ole David Økland, Csaba Pâkozdi, Louise Ankerstjerne Rolland, Knut Nordheim
Proc. ASME. IOWTC2022, ASME 2022 4th International Offshore Wind Technical Conference, V001T02A001, December 7–8, 2022
Paper No: IOWTC2022-98625
DOI: https://doi.org/10.1115/IOWTC2022-98625
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Topics: Stress, Waves, Wind
Proceedings Papers

Nonlinear Wave Load Models for Extra Large Monopiles

Csaba Pákozdi, Silas Spence, Sebastien Fouques, Maxime Thys, Hagbart S. Alsos, Erin E. Bachynski, Hans Bihs, Arun Kamath
Proc. ASME. IOWTC2018, ASME 2018 1st International Offshore Wind Technical Conference, V001T01A033, November 4–7, 2018
Paper No: IOWTC2018-1083
DOI: https://doi.org/10.1115/IOWTC2018-1083
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Topics: Nonlinear waves, Stress, Waves, Kinematics, Computational fluid dynamics, Design, Engineering simulation, Modeling, Morison equation, Ocean engineering
Journal Articles

Evaluation of Nonlinear Material Behavior for Offshore Structures Subjected to Accidental Actions

Martin Storheim, Hagbart S. Alsos, Jørgen Amdahl
Journal: Journal of Offshore Mechanics and Arctic Engineering
Article Type: Research-Article
J. Offshore Mech. Arct. Eng. August 2018, 140(4): 041401.
Paper No: OMAE-17-1044
DOI: https://doi.org/10.1115/1.4038585
Published Online: January 9, 2018
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Topics: Fracture (Materials), Fracture (Process), Safety, Hardening, Simulation, Stress
Proceedings Papers

Evaluation of Nonlinear Material Behavior for Offshore Structures Subjected to Accidental Actions

Martin Storheim, Hagbart S. Alsos, Jørgen Amdahl
Proc. ASME. OMAE2017, Volume 3A: Structures, Safety and Reliability, V03AT02A006, June 25–30, 2017
Paper No: OMAE2017-61861
DOI: https://doi.org/10.1115/OMAE2017-61861
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Topics: Ductile fracture, Hardening, Offshore structures, Safety
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
Paper No: OMAE2016-54855
DOI: https://doi.org/10.1115/OMAE2016-54855
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Topics: Design, Pipelines, Damage, Deformation, Energy dissipation, Kinetic energy, Ocean engineering, Coating processes, Coatings, Deflection
Proceedings Papers

Analysis of Clump-Weight Interference With Offshore Pipelines: Mechanisms and Actions

Hagbart S. Alsos, Åsta O. Wendel, Stig Olav Kvarme, Svein Sævik
Proc. ASME. OMAE2016, Volume 5: Pipelines, Risers, and Subsea Systems, V005T04A030, June 19–24, 2016
Paper No: OMAE2016-54196
DOI: https://doi.org/10.1115/OMAE2016-54196
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Topics: Underwater pipelines, Weight (Mass), Pipelines, Design, Stress, Arches, Differential equations, Drag (Fluid dynamics), Friction, Gears
Proceedings Papers

Estimates of the Number of Vibration Cycles From Frequency Locked-in Ice Loads

Morten Bjerkås, Hagbart S. Alsos, Kasper Wåsjø
Proc. ASME. OMAE2014, Volume 10: Polar and Arctic Science and Technology, V010T07A008, June 8–13, 2014
Paper No: OMAE2014-23134
DOI: https://doi.org/10.1115/OMAE2014-23134
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Topics: Cycles, Ice, Stress, Vibration, Locks (Waterways)
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
Paper No: OMAE2012-83859
DOI: https://doi.org/10.1115/OMAE2012-83859
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Topics: Damage, Pipelines, Deformation, Kinetic energy, Ocean engineering, Deflection, Design, Energy dissipation, Finite element analysis, Piping design
Proceedings Papers

Detailed Analysis of Clump-Weight Interference With Subsea Pipelines

Kristian Maalø, Hagbart S. Alsos, Svein Sævik
Proc. ASME. OMAE2012, Volume 3: Pipeline and Riser Technology, 725-732, July 1–6, 2012
Paper No: OMAE2012-83869
DOI: https://doi.org/10.1115/OMAE2012-83869
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Topics: Underwater pipelines, Weight (Mass), Pipelines, Gears, Computer software, Design, Displacement, Engineering simulation, Finite element analysis, Free spanning pipelines
Proceedings Papers

On the Ductile Response of Stiffened Panels Subjected to Lateral Indentation: Experimental and Numerical Analysis

Hagbart S. Alsos, Jo̸rgen Amdahl
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 2, 575-583, June 6–11, 2010
Paper No: OMAE2010-20788
DOI: https://doi.org/10.1115/OMAE2010-20788
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Topics: Collisions (Physics), Deformation, Dimensions, Ductile fracture, Engineering simulation, Explosions, Failure, Finite element analysis, Fracture (Materials), Fracture (Process)
Proceedings Papers

Finite Element Analysis of Flexible Riser Impact

Hagbart S. Alsos, Bogi Laksa´foss, Per D. Rasmussen, Claus Kristensen, Gunnar Paulsen
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5, Parts A and B, 741-749, June 6–11, 2010
Paper No: OMAE2010-20777
DOI: https://doi.org/10.1115/OMAE2010-20777
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Topics: Finite element analysis, Flexible risers, Pipeline risers, Risers (Casting), Deformation, Pipes, Armor, Ocean engineering, Computer software, Damage
Proceedings Papers

Analysis of Bottom Damage Caused by Ship Grounding

Hagbart S. Alsos, Jo̸rgen Amdahl
Proc. ASME. OMAE2008, Volume 2: Structures, Safety and Reliability, 829-836, June 15–20, 2008
Paper No: OMAE2008-57868
DOI: https://doi.org/10.1115/OMAE2008-57868
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Topics: Damage, Fracture (Materials), Hull, Ships, Computer simulation, Rupture, Seabed, Shapes, Simulation, Tankers