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Journal Articles

Simultaneous Measurements From Buoys and Vessel-Mounted X-Band Radar to Study Currents and Waves at Breisundet Field

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Gowtham Radhakrishnan, Bernt J. Leira, Zhen Gao, Svein Sævik, Konstantinos Christakos, Johann A. Dirdal
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. December 2025, 147(6): 061202.
Paper No: OMAE-24-1143
https://doi.org/10.1115/1.4068308
Published Online: April 25, 2025
View Articletitled, Simultaneous Measurements From Buoys and Vessel-Mounted X-Band Radar to Study Currents and Waves at Breisundet Field
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Topics: Buoys, Radar, Spectra (Spectroscopy), Vessels, Waves, Currents
Proceedings Papers

Bayesian Updating by Utilization of Bayesian Optimization for Estimation of VIV Load Parameters

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Bernt J. Leira, Martin L. Andersen, Jie Wu, Svein Sævik
Proc. ASME. OMAE2024, Volume 2: Structures, Safety, and Reliability, V002T02A006, June 9–14, 2024
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2024-122594
https://doi.org/10.1115/OMAE2024-122594
View Paper titled, Bayesian Updating by Utilization of Bayesian Optimization for Estimation of VIV Load Parameters
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Topics: Optimization, Stress, Vortex-induced vibration
Proceedings Papers

Time Domain Prediction of Combined CF and IL VIV Responses Under Constant Currents

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Jie Wu, Decao Yin, Halvor Lie, Elizabeth Passano, Gro Sagli Baarholm, Svein Sævik
Proc. ASME. OMAE2024, Volume 6: Polar and Arctic Sciences and Technology; CFD, FSI, and AI, V006T08A029, June 9–14, 2024
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2024-127490
https://doi.org/10.1115/OMAE2024-127490
View Paper titled, Time Domain Prediction of Combined CF and IL VIV Responses Under Constant Currents
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Topics: Currents, Vortex-induced vibration
Proceedings Papers

The Influence of Current Profile on On-Bottom Stability of Subsea Cable

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Mingxuan Hao, Vegard Longva, Naiquan Ye, Guomin Ji, Svein Sævik
Proc. ASME. OMAE2024, Volume 7: Ocean Renewable Energy, V007T09A003, June 9–14, 2024
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2024-121562
https://doi.org/10.1115/OMAE2024-121562
View Paper titled, The Influence of Current Profile on On-Bottom Stability of Subsea Cable
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Topics: Cables, Ocean engineering, Stability, Wind
Journal Articles

Analyzing the Sensitivity of Wave Frequency Responses of Floating Vessels to Uncertain System Variables Utilizing Polynomial Chaos Expansion

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Gowtham Radhakrishnan, Bernt J. Leira, Zhen Gao, Svein Sævik, Xu Han
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. June 2024, 146(3): 031702.
Paper No: OMAE-23-1063
https://doi.org/10.1115/1.4063619
Published Online: December 11, 2023
View Articletitled, Analyzing the Sensitivity of Wave Frequency Responses of Floating Vessels to Uncertain System Variables Utilizing Polynomial Chaos Expansion
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Topics: Chaos, Polynomials, Vessels, Sensitivity analysis, Waves, Uncertainty
Proceedings Papers

Lateral Buckling of Tensile Armor Wires in Flexible Pipe Subject to Axial Compressive and Cyclic Bending Load

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Naiquan Ye, Guomin Ji, Svein Sævik
Proc. ASME. OMAE2023, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A013, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-104823
https://doi.org/10.1115/OMAE2023-104823
View Paper titled, Lateral Buckling of Tensile Armor Wires in Flexible Pipe Subject to Axial Compressive and Cyclic Bending Load
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Topics: Armor, Buckling, Compression, Pipes, Stress, Wire
Proceedings Papers

Retrieval of Ocean Wave Spectra From X-Band Marine Radar Images Using Inversion Schemes Based on Auto-Spectral Analysis

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Gowtham Radhakrishnan, Bernt J. Leira, Zhen Gao, Svein Sævik, Konstantinos Christakos
Proc. ASME. OMAE2023, Volume 5: Ocean Engineering, V005T06A060, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-104877
https://doi.org/10.1115/OMAE2023-104877
View Paper titled, Retrieval of Ocean Wave Spectra From X-Band Marine Radar Images Using Inversion Schemes Based on Auto-Spectral Analysis
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Topics: Buoys, Ocean waves, Radar, Spectra (Spectroscopy), Waves, Transfer functions, Vessels, Computer simulation, Decision making, Dispersion (Optics)
Proceedings Papers

A Methodology for Tuning of Computational Vessel Models Utilizing Wave Measurements From X-Band Marine Radar and Wave Buoy

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Gowtham Radhakrishnan, Bernt J. Leira, Zhen Gao, Svein Sævik, Karl E. Kaasen, Konstantinos Christakos, Johann A. Dirdal
Proc. ASME. OMAE2023, Volume 2: Structures, Safety, and Reliability, V002T02A010, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-104492
https://doi.org/10.1115/OMAE2023-104492
View Paper titled, A Methodology for Tuning of Computational Vessel Models Utilizing Wave Measurements From X-Band Marine Radar and Wave Buoy
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Topics: Buoys, Entropy, Radar, Vessels, Waves
Proceedings Papers

Evaluation of VIV Prediction Practice of Deep-Water Steel Lazy Wave Risers (SLWRs)

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Jie Wu, Fengjian Jiang, Halvor Lie, Elizabeth Passano, Decao Yin, Svein Sævik, Guttorm Grytøyr, Brendan Francis Hogg, Themistocles Resvanis, Kim Vandiver
Proc. ASME. OMAE2023, Volume 7: CFD & FSI, V007T08A033, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-105583
https://doi.org/10.1115/OMAE2023-105583
View Paper titled, Evaluation of VIV Prediction Practice of Deep-Water Steel Lazy Wave Risers (SLWRs)
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Topics: Pipeline risers, Risers (Casting), Steel, Vortex-induced vibration, Water, Waves
Journal Articles

Wave Effects on Vortex-Induced Vibrations of a Top-Tensioned Riser

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Decao Yin, Jie Wu, Halvor Lie, Elizabeth Passano, Svein Saevík, Guttorm Grytoøyr, Michael A. Tognarelli, Torgrim Andersen, Ragnar Igland, Daniel Karunakaran, Collin Gaskill
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. August 2023, 145(4): 041901.
Paper No: OMAE-22-1078
https://doi.org/10.1115/1.4056521
Published Online: January 9, 2023
View Articletitled, Wave Effects on Vortex-Induced Vibrations of a Top-Tensioned Riser
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Topics: Pipeline risers, Top-tensioned risers, Vortex-induced vibration, Waves, Displacement, Stress, Risers (Casting)
Proceedings Papers

Time Domain Prediction of VIV Responses in Oscillatory Flow Conditions

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Jie Wu, Decao Yin, Jingzhe Jin, Halvor Lie, Elizabeth Passano, Svein Sævik, Guttorm Grytøyr, Michael A. Tognarelli, Daniel Karunakaran, Torgrim Andersen, Ragnar Igland
Proc. ASME. OMAE2022, Volume 7: CFD and FSI, V007T08A030, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79191
https://doi.org/10.1115/OMAE2022-79191
View Paper titled, Time Domain Prediction of VIV Responses in Oscillatory Flow Conditions
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Topics: Flow (Dynamics), Pipeline risers, Risers (Casting), Steel catenary risers, Vortex-induced vibration, Waves
Proceedings Papers

Vortex-Induced Vibrations of a Top-Tensioned Riser in Combined Currents and Waves

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Decao Yin, Jie Wu, Halvor Lie, Elizabeth Passano, Svein Sævik, Guttorm Grytoyr, Michael A. Tognarelli, Torgrim Andersen, Ragnar Igland, Daniel Karunakaran, Collin Gaskill
Proc. ASME. OMAE2022, Volume 7: CFD and FSI, V007T08A028, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79033
https://doi.org/10.1115/OMAE2022-79033
View Paper titled, Vortex-Induced Vibrations of a Top-Tensioned Riser in Combined Currents and Waves
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Topics: Currents, Top-tensioned risers, Vortex-induced vibration, Waves, Pipeline risers, Risers (Casting), Stress, Vessels, Dynamic response, Computer simulation
Proceedings Papers

VIV Responses of a Drilling Riser Subjected to Current and Top Motions

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Jie Wu, Decao Yin, Jingzhe Jin, Halvor Lie, Elizabeth Passano, Svein Sævik, Michael A. Tognarelli, Guttorm Grytoyr, Ragnar Igland, Daniel Karunakaran, Torgrim Anderson, Collin Gaskill
Proc. ASME. OMAE2022, Volume 7: CFD and FSI, V007T08A029, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79180
https://doi.org/10.1115/OMAE2022-79180
View Paper titled, VIV Responses of a Drilling Riser Subjected to Current and Top Motions
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Topics: Pipeline risers, Vortex-induced vibration, Flow (Dynamics), Stress, Engineering design processes, Marine structures, Ocean currents, Vessels, Waves
Proceedings Papers

Application of Optimization Algorithm on Parameters of an Empirical VIV Prediction Tool

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Decao Yin, Jie Wu, Halvor Lie, Jingzhe Jin, Elizabeth Passano, Svein Sævik, Solve Eidnes, Guttorm Grytoyr, Michael A. Tognarelli, Torgrim Andersen, Ragnar Igland, Daniel Karunakaran, Collin Gaskill
Proc. ASME. OMAE2022, Volume 7: CFD and FSI, V007T08A026, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79015
https://doi.org/10.1115/OMAE2022-79015
View Paper titled, Application of Optimization Algorithm on Parameters of an Empirical VIV Prediction Tool
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Topics: Optimization algorithms, Vortex-induced vibration, Cross-flow, Algorithms, Computer simulation, Databases, Marine structures, Optimization, Safety, Uncertainty
Proceedings Papers

Motion Response Prediction of Marine Vessels Based on Hydrodynamic Models Updated Through On-Site Measurements

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Gowtham Radhakrishnan, Bernt J. Leira, Zhen Gao, Svein Sævik, Alojz Gomola
Proc. ASME. OMAE2022, Volume 2: Structures, Safety, and Reliability, V002T02A018, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-78912
https://doi.org/10.1115/OMAE2022-78912
View Paper titled, Motion Response Prediction of Marine Vessels Based on Hydrodynamic Models Updated Through On-Site Measurements
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Topics: Spectra (Spectroscopy), Vessels, Waves, Optimization, Uncertainty, Errors, North Sea, Ocean engineering, Physics
Proceedings Papers

Simulation of Trawl Board and Pipeline Pull-Over Interaction

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Vegard Longva, Erik Levold, Håvar Ilstad, Svein Sævik, Frank Klæbo, Marie Finstad Opgård, Stefan Arenfeldt Vilsen
Proc. ASME. OMAE2022, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A027, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79928
https://doi.org/10.1115/OMAE2022-79928
View Paper titled, Simulation of Trawl Board and Pipeline Pull-Over Interaction
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Topics: Pipelines, Simulation, Stress, Finite element model, Lumber, Flumes, Interpolation, Ropes, Seabed, Steel
Proceedings Papers

A Framework for Condition Monitoring and Risk-Based Decision Support Involving a Vessel State Observer

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Xu Han, Bernt J. Leira, Svein Sævik, Gowtham Radhakrishnan, Stian Skjong, Lars T. Kyllingstad
Proc. ASME. OMAE2021, Volume 2: Structures, Safety, and Reliability, V002T02A018, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-61850
https://doi.org/10.1115/OMAE2021-61850
View Paper titled, A Framework for Condition Monitoring and Risk-Based Decision Support Involving a Vessel State Observer
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Topics: Condition monitoring, Risk, State estimation, Vessels, Sensors, Data acquisition, Inertia (Mechanics), Waves, Center of mass, Damping
Proceedings Papers

Optimization of Hydrodynamic Coefficients for VIV Prediction

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Decao Yin, Jie Wu, Halvor Lie, Jingzhe Jin, Elizabeth Passano, Svein Saevik, Signe Riemer-Sorenson, Anne Marthine Rustad, Michael A. Tognarelli, Guttorm Grytyr, Torgrim Andersen, Daniel Karunakaran, Ragnar Igland, Collin Gaskill
Proc. ASME. OMAE2021, Volume 8: CFD and FSI, V008T08A025, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-63890
https://doi.org/10.1115/OMAE2021-63890
View Paper titled, Optimization of Hydrodynamic Coefficients for VIV Prediction
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Topics: Optimization, Vortex-induced vibration, Flow (Dynamics), Pipeline risers, Risers (Casting), Algorithms, Databases, Nonlinear programming, Ocean engineering, Computer software
Proceedings Papers

System Uncertainty Effects on the Wave Frequency Response Of Floating Vessels Based on Polynomial Chaos Expansion

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Gowtham Radhakrishnan, Xu Han, Svein Sævik, Zhen Gao, Bernt Johan Leira
Proc. ASME. OMAE2021, Volume 2: Structures, Safety, and Reliability, V002T02A016, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-62542
https://doi.org/10.1115/OMAE2021-62542
View Paper titled, System Uncertainty Effects on the Wave Frequency Response Of Floating Vessels Based on Polynomial Chaos Expansion
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Topics: Chaos, Frequency-domain analysis, Polynomials, Sensitivity analysis, Uncertainty, Vessels, Wave frequency
Journal Articles

Simulating High-Mode Vortex-Induced Vibration of a Riser in Linearly Sheared Current Using an Empirical Time-Domain Model

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Sang Woo Kim, Svein Sævik, Jie Wu, Bernt Johan Leira
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. August 2021, 143(4): 041901.
Paper No: OMAE-20-1127
https://doi.org/10.1115/1.4049246
Published Online: January 12, 2021
View Articletitled, Simulating High-Mode Vortex-Induced Vibration of a Riser in Linearly Sheared Current Using an Empirical Time-Domain Model
Open the PDF for Simulating High-Mode Vortex-Induced Vibration of a Riser in Linearly Sheared Current Using an Empirical Time-Domain Model in another window
Topics: Fatigue damage, Pipeline risers, Risers (Casting), Stress, Vortex-induced vibration, Tension, Simulation