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Kostas F. Lambrakos
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Proceedings Papers

Prediction of Offshore Platform Mooring Line Tensions Using Artificial Neural Network

Djoni E. Sidarta, Johyun Kyoung, Jim O’Sullivan, Kostas F. Lambrakos
Proc. ASME. OMAE2017, Volume 1: Offshore Technology, V001T01A079, June 25–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2017-61942
https://doi.org/10.1115/OMAE2017-61942
View Paper titled, Prediction of Offshore Platform Mooring Line Tensions Using Artificial Neural Network
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Topics: Artificial neural networks, Mooring, Offshore platforms, Seas, Computer simulation, Vessels, Algorithms, Design, Fatigue, Semi-submersible offshore structures
Proceedings Papers

An Efficient Time Domain Code for Strength and Fatigue Analysis of Steel Catenary Risers

Djoni E. Sidarta, Xiaoning Jing, Kostas F. Lambrakos, Roger W. Burke, William C. Webster
Proc. ASME. OMAE2015, Volume 5B: Pipeline and Riser Technology, V05BT04A039, May 31–June 5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2015-41957
https://doi.org/10.1115/OMAE2015-41957
View Paper titled, An Efficient Time Domain Code for Strength and Fatigue Analysis of Steel Catenary Risers
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Topics: Fatigue analysis, Steel catenary risers, Pipeline risers, Risers (Casting), Dynamic analysis, Fatigue, Finite element analysis, Vessels, American Petroleum Institute, Computation
Journal Articles

Experimental Comparison of Three Floating Wind Turbine Concepts

Andrew J. Goupee, Bonjun J. Koo, Richard W. Kimball, Kostas F. Lambrakos, Habib J. Dagher
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Special Section Articles
J. Offshore Mech. Arct. Eng. May 2014, 136(2): 020906.
Paper No: OMAE-13-1003
https://doi.org/10.1115/1.4025804
Published Online: March 24, 2014
View Article titled, Experimental Comparison of Three Floating Wind Turbine Concepts
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Topics: Buoys, Floating wind turbines, Mooring, Seas, Semi-submersible offshore structures, Spar platforms, Spectra (Spectroscopy), Stress, Surges, Tension-leg platforms
Journal Articles

Model Tests for a Floating Wind Turbine on Three Different Floaters

Bonjun J. Koo, Andrew J. Goupee, Richard W. Kimball, Kostas F. Lambrakos
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Special Section Articles
J. Offshore Mech. Arct. Eng. May 2014, 136(2): 020907.
Paper No: OMAE-13-1004
https://doi.org/10.1115/1.4024711
Published Online: March 24, 2014
View Article titled, Model Tests for a Floating Wind Turbine on Three Different Floaters
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Topics: Buoys, Calibration, Floating wind turbines, Semi-submersible offshore structures, Spar platforms, Tension-leg platforms, Waves, Wind, Wind turbines, Wing spars
Proceedings Papers

Experimental Comparison of Three Floating Wind Turbine Concepts

Andrew J. Goupee, Bonjun Koo, Richard W. Kimball, Kostas F. Lambrakos, Habib J. Dagher
Proc. ASME. OMAE2012, Volume 7: Ocean Space Utilization; Ocean Renewable Energy, 467-476, July 1–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2012-83645
https://doi.org/10.1115/OMAE2012-83645
View Paper titled, Experimental Comparison of Three Floating Wind Turbine Concepts
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Topics: Floating wind turbines, Wind, Mooring, Ocean engineering, Renewable energy, Rotors, Wind turbines, Buoys, Dynamics (Mechanics), Flow (Dynamics)
Proceedings Papers

Time Domain VIV Prediction for Top Tensioned Risers

Yongming Cheng, Kostas F. Lambrakos, Roger Burke, Paul Stanton
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6, 409-419, June 6–11, 2010
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2010-20100
https://doi.org/10.1115/OMAE2010-20100
View Paper titled, Time Domain VIV Prediction for Top Tensioned Risers
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Topics: Top-tensioned risers, Vortex-induced vibration, Pipeline risers, Risers (Casting), Spar platforms, Tension, Wing spars, Keel, Manufacturing systems, Boundary-value problems
Proceedings Papers

Investigation of VIV Fatigue Prediction for a Top Tensioned Riser

Yongming Cheng, Lixin Xu, Kostas F. Lambrakos, Karl Muriby
Proc. ASME. OMAE2009, Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV, 509-519, May 31–June 5, 2009
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2009-79508
https://doi.org/10.1115/OMAE2009-79508
View Paper titled, Investigation of VIV Fatigue Prediction for a Top Tensioned Riser
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Topics: Fatigue, Top-tensioned risers, Vortex-induced vibration, Pipeline risers, Risers (Casting), Ocean engineering, Spar platforms, Wing spars, Drilling, Finite element analysis
Proceedings Papers

Time Domain VIV Analysis of a Free Standing Hybrid Riser

Nicole Liu, Yongming Cheng, Jaap de Wilde, Roger Burke, Kostas F. Lambrakos
Proc. ASME. OMAE2009, Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV, 521-530, May 31–June 5, 2009
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2009-79510
https://doi.org/10.1115/OMAE2009-79510
View Paper titled, Time Domain VIV Analysis of a Free Standing Hybrid Riser
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Topics: Hybrid risers, Vortex-induced vibration, Pipeline risers, Risers (Casting), Buoyancy, Manufacturing systems, Computer software, Finite element analysis, Gulf of Mexico, Transients (Dynamics)
Proceedings Papers

Hydrodynamic Coefficients for Riser In-Line VIV in Sheared Currents

Djoni E. Sidarta, Kostas F. Lambrakos, Carl M. Larsen
Proc. ASME. OMAE2007, Volume 3: Pipeline and Riser Technology; CFD and VIV, 941-948, June 10–15, 2007
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2007-29519
https://doi.org/10.1115/OMAE2007-29519
View Paper titled, Hydrodynamic Coefficients for Riser In-Line VIV in Sheared Currents
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Topics: Currents, Pipeline risers, Risers (Casting), Vortex-induced vibration, Cross-flow, Excitation, Modeling, Accounting, Damping, Design
Proceedings Papers

Time Domain Riser VIV Predictions Compared to Field and Laboratory Test Data

Yongming Cheng, Kostas F. Lambrakos
Proc. ASME. OMAE2007, Volume 3: Pipeline and Riser Technology; CFD and VIV, 965-975, June 10–15, 2007
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2007-29548
https://doi.org/10.1115/OMAE2007-29548
View Paper titled, Time Domain Riser VIV Predictions Compared to Field and Laboratory Test Data
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Topics: Pipeline risers, Risers (Casting), Vortex-induced vibration, Design, Ocean engineering, Transients (Dynamics), Boats, Computers, Fatigue, Flow (Dynamics)
Proceedings Papers

Hydrodynamic Coefficients for Risers With Strakes

Kostas F. Lambrakos, Michael S. Trianafyliou, Thanos Moros
Proc. ASME. OMAE2002, 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, 467-471, June 23–28, 2002
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2002-28221
https://doi.org/10.1115/OMAE2002-28221
View Paper titled, Hydrodynamic Coefficients for Risers With Strakes
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Topics: Pipeline risers, Risers (Casting), Drag (Fluid dynamics), Design, Fatigue damage, Oscillations, Flow (Dynamics), Inertia (Mechanics), Ocean engineering, Storms
Proceedings Papers

Methods for Reducing a Large Number of Current Profiles to a Small Subset for Riser VIV Analysis

Kostas F. Lambrakos, Djoni E. Sidarta, Hugh M. Thompson, Atle Steen, Roger W. Burke
Proc. ASME. OMAE2005, 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 1, Parts A and B, 557-566, June 12–17, 2005
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2005-67279
https://doi.org/10.1115/OMAE2005-67279
View Paper titled, Methods for Reducing a Large Number of Current Profiles to a Small Subset for Riser VIV Analysis
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Topics: Pipeline risers, Risers (Casting), Vortex-induced vibration, Fatigue damage, Currents, Excitation, Shear (Mechanics)
Proceedings Papers

A Methodology for In-Line VIV Analysis of Risers in Sheared Currents

Djoni E. Sidarta, Kostas F. Lambrakos, Hugh M. Thompson, Roger W. Burke
Proc. ASME. OMAE2006, Volume 4: Terry Jones Pipeline Technology; Ocean Space Utilization; CFD and VIV Symposium, 819-827, June 4–9, 2006
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2006-92431
https://doi.org/10.1115/OMAE2006-92431
View Paper titled, A Methodology for In-Line VIV Analysis of Risers in Sheared Currents
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Topics: Currents, Pipeline risers, Risers (Casting), Vortex-induced vibration, Cross-flow, Excitation, Fatigue damage, Accounting, Damage, Damping
Proceedings Papers

Time Domain Computation of Riser VIV From Vessel Motions

Yongming Cheng, Kostas F. Lambrakos
Proc. ASME. OMAE2006, Volume 4: Terry Jones Pipeline Technology; Ocean Space Utilization; CFD and VIV Symposium, 829-838, June 4–9, 2006
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2006-92432
https://doi.org/10.1115/OMAE2006-92432
View Paper titled, Time Domain Computation of Riser VIV From Vessel Motions
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Topics: Computation, Pipeline risers, Risers (Casting), Vessels, Vortex-induced vibration, Fatigue damage, Computers, Currents, Fatigue life, Steady state