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Proceedings Papers

The Fundamental Research on AI Prediction and Determination of Control Force for Maximizing the Power Generation of PA-WEC in Irregular Waves

Motohiko Murai, Sho Sakamoto

Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A010, June 21–30, 2021

Paper No: OMAE2021-61493

DOI: https://doi.org/10.1115/OMAE2021-61493

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Topics: Energy generation, Waves, Renewable energy, Machine learning, Artificial intelligence, Certainty, Fossil fuels, Oceans, Wave energy, Wave energy converters

Proceedings Papers

Possibility of Reducing Spar-Type FOWT Hydrodynamic Response Using a Torus Structure With Annular Flow

Motohiko Murai, Xiaolei Liu

Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A015, June 21–30, 2021

Paper No: OMAE2021-62385

DOI: https://doi.org/10.1115/OMAE2021-62385

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Topics: Flow (Dynamics), Potential theory (Physics), Spar platforms, Wing spars

Proceedings Papers

Experimental Study of Slam Forces on External Turrets With Different Top Angles

Yuki Ishihara, Motohiko Murai, So Nakanishi, Shunji Kato, Yasuharu Nakajima

Proc. ASME. OMAE2020, Volume 6A: Ocean Engineering, V06AT06A042, August 3–7, 2020

Paper No: OMAE2020-18327

DOI: https://doi.org/10.1115/OMAE2020-18327

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Topics: Fatigue strength, FPSO, Low-pass filters, Mooring, Pareto distribution, Reliability, Statistical distributions

Proceedings Papers

How the Hydrodynamic Response of PA-WECs’ Array Under Maximizing the Power Generation by its Arrangement and Control Force Change?

Motohiko Murai, Junki Funada, Qiao Li

Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A011, August 3–7, 2020

Paper No: OMAE2020-18189

DOI: https://doi.org/10.1115/OMAE2020-18189

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Topics: Energy generation, Renewable energy, Waves, Damping, Fossil fuels, Generators, Wave energy, Wave energy converters, Wave frequency

Proceedings Papers

Environmental Regeneration for a Small-Scale Beach “Heda-Mihama Project”

Shigeru Tabeta, Ken Okamoto, Takayoshi Kato, Rikito Hisamatsu, Hiroaki Muto, Akinori Hino, Motohiko Murai, Sho Ito, Daisuke Kitazawa, Takeshi Kinoshita

Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A008, June 9–14, 2019

Paper No: OMAE2019-95596

DOI: https://doi.org/10.1115/OMAE2019-95596

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Topics: Countermeasures, Currents, Friction, Piers (Structural), Sediments, Shells, Shorelines, Simulation, Water, Water currents

Proceedings Papers

Control Strategy for a Point-Absorber Wave Energy Converter

Qiao Li, Motohiko Murai

Paper No: OMAE2019-95836

DOI: https://doi.org/10.1115/OMAE2019-95836

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Topics: Wave energy converters, Waves, Energy generation, Control algorithms, Electricity (Physics), Energy consumption, Generators, Safety, Seas

Proceedings Papers

Study on the Generated Power Changes by the Relation Between an Arrangement of an Array of Point Absorber Type WECs and an Incident Wave Angle

Motohiko Murai, Qiao Li, Junki Funada

Paper No: OMAE2019-95400

DOI: https://doi.org/10.1115/OMAE2019-95400

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Topics: Waves, Electricity (Physics), Renewable energy, Wave energy, Density, Diffraction, Fossil fuels, Generators, Linear systems, Radiation (Physics)

Proceedings Papers

Experimental Study on Bubble Size Measurement for Development of Seafloor Massive Sulfides

Seira Imai, Yasuharu Nakajima, Motohiko Murai

Proc. ASME. OMAE2019, Volume 6: Ocean Space Utilization, V006T05A010, June 9–14, 2019

Paper No: OMAE2019-95186

DOI: https://doi.org/10.1115/OMAE2019-95186

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Topics: Bubbles, Minerals, Seabed, Size measurement

Proceedings Papers

Study on a Time Domain Prediction Method for Wave Force: Application for a Point-Absorber WEC

Qiao Li, Motohiko Murai

Proc. ASME. OMAE2018, Volume 6: Ocean Space Utilization, V006T05A023, June 17–22, 2018

Paper No: OMAE2018-77720

DOI: https://doi.org/10.1115/OMAE2018-77720

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Topics: Wave forces, Waves, Floating bodies, Time-domain analysis, Algorithms, Displacement, Electricity (Physics), Generators, Numerical analysis, Wave energy converters

Proceedings Papers

The Influence of an Arrangement of an Array of Semi-Submersible Type FOWTs to Their Hydrodynamic Responses

Motohiko Murai, Kensaku Takahashi

Proc. ASME. OMAE2017, Volume 6: Ocean Space Utilization, V006T05A022, June 25–30, 2017

Paper No: OMAE2017-61614

DOI: https://doi.org/10.1115/OMAE2017-61614

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Topics: Semi-submersible offshore structures, Wind farms, Floating wind turbines, Oceans, Waves, Wind, Climate change, Construction, Electric power generation, Energy consumption

Proceedings Papers

Numerical Study on Expected Electrical Power of Linear Wave Energy Converter in Arrangement Condition

Qiao Li, Motohiko Murai, Syu Kuwada

Proc. ASME. OMAE2017, Volume 6: Ocean Space Utilization, V006T05A023, June 25–30, 2017

Paper No: OMAE2017-61656

DOI: https://doi.org/10.1115/OMAE2017-61656

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Topics: Electricity (Physics), Wave energy converters, Floating structures, Generators, Computer simulation, Copper, Seas, Waves

Proceedings Papers

Experimental Study on a 3-Dimensional Hydro-Elastic Deformation of “Underwater Platform” With Multi-Towers in Waves

Ken Haneda, Motohiko Murai, Jun Yamanoi

Proc. ASME. OMAE2016, Volume 6: Ocean Space Utilization; Ocean Renewable Energy, V006T05A012, June 19–24, 2016

Paper No: OMAE2016-54744

DOI: https://doi.org/10.1115/OMAE2016-54744

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Topics: Deformation, Waves, Buoys, Seas, Spar platforms, Wing spars, Cables, Mooring, Offshore wind turbines, Renewable energy

Proceedings Papers

Experimental Study on a Motion of “Underwater Platform” Including Hydro-Elastic Deformation in Waves

Motohiko Murai, Ken Haneda, Jun Yamanoi, Yuta Abe

Proc. ASME. OMAE2015, Volume 6: Ocean Space Utilization, V006T05A017, May 31–June 5, 2015

Paper No: OMAE2015-41722

DOI: https://doi.org/10.1115/OMAE2015-41722

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Topics: Deformation, Waves, Computer simulation, Energy generation, Water, Dynamics (Mechanics), Offshore wind turbines, Potential theory (Physics), Safety, Stability

Proceedings Papers

Comparison of Weathervane Performance Between Two Types of FOWT Systems Moored to SPM

Kazuhiro Iijima, Yuiko Kuroda, Yasunori Nihei, Motohiko Murai

Proc. ASME. OMAE2015, Volume 6: Ocean Space Utilization, V006T05A010, May 31–June 5, 2015

Paper No: OMAE2015-41137

DOI: https://doi.org/10.1115/OMAE2015-41137

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Topics: Mooring, Scanning probe microscopy, Stability, Equations of motion, Buoys, Design, Eigenvalues, Energy generation, Equilibrium (Physics), Offshore wind turbines

Proceedings Papers

A Comparative Study of Motion Performance of Four Different FOWT Designs in Combined Wind and Wave Loads

Yasunori Nihei, Kazuhiro Iijima, Motohiko Murai, Tomoki Ikoma

Proc. ASME. OMAE2014, Volume 7: Ocean Space Utilization; Professor Emeritus J. Randolph Paulling Honoring Symposium on Ocean Technology, V007T05A025, June 8–13, 2014

Paper No: OMAE2014-24643

DOI: https://doi.org/10.1115/OMAE2014-24643

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Topics: Stress, Waves, Wind, Mooring, Semi-submersible offshore structures, Tension-leg platforms, Maintainability, Offshore wind turbines, Wind turbines

Proceedings Papers

New Design Proposal for the TLP Type Offshore Wind Turbines

Yasunori Nihei, Midori Matsuura, Motohiko Murai, Kazuhiro Iijima, Tomoki Ikoma

Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T05A026, June 9–14, 2013

Paper No: OMAE2013-11263

DOI: https://doi.org/10.1115/OMAE2013-11263

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Topics: Design, Offshore wind turbines, Tension-leg platforms, Engineering prototypes, Design methodology, Displacement, Water, Wave forces, Waves, Weight (Mass)

Proceedings Papers

A Study on Non-Linear Response of Moored Floating Body Considering Dynamic Motion of Mooring Lines

Keiji Nonaka, Motohiko Murai, Atsushi Nagamine

Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T05A011, June 9–14, 2013

Paper No: OMAE2013-10612

DOI: https://doi.org/10.1115/OMAE2013-10612

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Topics: Floating bodies, Mooring, Offshore structures, Seas, Oceans, Tension-leg platforms, Chain, Seabed, Wind turbines

Proceedings Papers

Investigations Into Motion Characteristics of a Multi-Column Type FOWT in Waves and Winds

Motohiko Murai, Miki Takei, Hotsuma Saeki, Yasunori Nihei, Kazuhiro Iijima, Tomoki Ikoma

Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T05A022, June 9–14, 2013

Paper No: OMAE2013-11131

DOI: https://doi.org/10.1115/OMAE2013-11131

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Topics: Waves, Design, Footings (Construction), Semi-submersible offshore structures, Shapes

Proceedings Papers

Designing Process and Motion Characteristics of Spar Type Offshore Wind Turbines

Yasunori Nihei, Tomoki Ikoma, Minori Kozen, Fumiya Sato, Motohiko Murai, Kazuhiro Iijima

Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T05A025, June 9–14, 2013

Paper No: OMAE2013-11262

DOI: https://doi.org/10.1115/OMAE2013-11262

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Topics: Design, Offshore wind turbines, Spar platforms, Wing spars, Mooring, Wind turbines

Proceedings Papers

Experimental Investigation of the Effects of a Pulsating Internal Flow on the Dynamics of a Submersed U-Shaped Flexible Pipe

Marcio Yamamoto, Shotaro Uto, Tomo Fujiwara, Motohiko Murai

Proc. ASME. OMAE2012, Volume 3: Pipeline and Riser Technology, 47-55, July 1–6, 2012

Paper No: OMAE2012-83069

DOI: https://doi.org/10.1115/OMAE2012-83069

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Topics: Dynamics (Mechanics), Internal flow, Pipes, Pipeline risers, Risers (Casting), Dynamic response, Flow (Dynamics), Ocean engineering, Petroleum, Seas

Journal citation

NARROW

The Fundamental Research on AI Prediction and Determination of Control Force for Maximizing the Power Generation of PA-WEC in Irregular Waves

Possibility of Reducing Spar-Type FOWT Hydrodynamic Response Using a Torus Structure With Annular Flow

Experimental Study of Slam Forces on External Turrets With Different Top Angles

How the Hydrodynamic Response of PA-WECs’ Array Under Maximizing the Power Generation by its Arrangement and Control Force Change?

Environmental Regeneration for a Small-Scale Beach “Heda-Mihama Project”

Control Strategy for a Point-Absorber Wave Energy Converter

Study on the Generated Power Changes by the Relation Between an Arrangement of an Array of Point Absorber Type WECs and an Incident Wave Angle

Experimental Study on Bubble Size Measurement for Development of Seafloor Massive Sulfides

Study on a Time Domain Prediction Method for Wave Force: Application for a Point-Absorber WEC

The Influence of an Arrangement of an Array of Semi-Submersible Type FOWTs to Their Hydrodynamic Responses

Numerical Study on Expected Electrical Power of Linear Wave Energy Converter in Arrangement Condition

Experimental Study on a 3-Dimensional Hydro-Elastic Deformation of “Underwater Platform” With Multi-Towers in Waves

Experimental Study on a Motion of “Underwater Platform” Including Hydro-Elastic Deformation in Waves

Comparison of Weathervane Performance Between Two Types of FOWT Systems Moored to SPM

A Comparative Study of Motion Performance of Four Different FOWT Designs in Combined Wind and Wave Loads

New Design Proposal for the TLP Type Offshore Wind Turbines

A Study on Non-Linear Response of Moored Floating Body Considering Dynamic Motion of Mooring Lines

Investigations Into Motion Characteristics of a Multi-Column Type FOWT in Waves and Winds

Designing Process and Motion Characteristics of Spar Type Offshore Wind Turbines

Experimental Investigation of the Effects of a Pulsating Internal Flow on the Dynamics of a Submersed U-Shaped Flexible Pipe

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