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Proceedings Papers

Comparative Verification of Numerical Analysis and Model Experiments for Oyster Farming

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Hiroki Tamura, Yasunori Nihei
Proc. ASME. OMAE2022, Volume 4: Ocean Space Utilization, V004T05A003, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-78933
https://doi.org/10.1115/OMAE2022-78933
View Paper titled, Comparative Verification of Numerical Analysis and Model Experiments for Oyster Farming
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Topics: Numerical analysis, Accuracy and precision, Computer software, Damage, Displacement, Motion analysis, Waves
Proceedings Papers

Experimental Study on the Stability Performance and Turning Motion of Multi-Connection VAWT

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Saika Iwamatsu, Yasunori Nihei, Kazuhiro Iijima, Tomoki Ikoma, Tomoki Komori
Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A024, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-62662
https://doi.org/10.1115/OMAE2021-62662
View Paper titled, Experimental Study on the Stability Performance and Turning Motion of Multi-Connection VAWT
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Topics: Mooring, Stability, Turning, Vertical axis wind turbines
Proceedings Papers

Numerical and Experimental Comparison of the Wave Response of a Very Light Floating Offshore Wind Turbine With Guy Wires

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Hiroki Shiohara, Rodolfo T. Gonçalves, Hidetaka Houtani, Hideyuki Suzuki, Anja Schnepf, Shinichiro Hirabayashi, Lucas H. S. Carmo, Yasunori Nihei
Proc. ASME. OMAE2020, Volume 1: Offshore Technology, V001T01A055, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-19163
https://doi.org/10.1115/OMAE2020-19163
View Paper titled, Numerical and Experimental Comparison of the Wave Response of a Very Light Floating Offshore Wind Turbine With Guy Wires
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Topics: Floating wind turbines, Guy wires, Waves
Proceedings Papers

Basic Research on the Influence of Descent Flow From Small Unmanned Aerial Vehicle (Quadcopter) on a Small Floating Body

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Mingyao Ji, Sharath Srinivasamurthy, Yasunori Nihei
Proc. ASME. OMAE2020, Volume 6A: Ocean Engineering, V06AT06A034, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18787
https://doi.org/10.1115/OMAE2020-18787
View Paper titled, Basic Research on the Influence of Descent Flow From Small Unmanned Aerial Vehicle (Quadcopter) on a Small Floating Body
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Topics: Floating bodies, Flow (Dynamics), Unmanned aerial vehicles, Batteries, Water, Aircraft, Design, Flight, Maintenance, Ocean engineering
Proceedings Papers

Design Methodology and Development of an Independently Rotating Multi-Hull Vessel

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Yasunori Nihei, Sharath Srinivasamurthy, Hiroshi Sakamoto, Norikazu Masuda, Naoyuki Hara
Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A051, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95401
https://doi.org/10.1115/OMAE2019-95401
View Paper titled, Design Methodology and Development of an Independently Rotating Multi-Hull Vessel
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Topics: Design methodology, Hull, Vessels, Water, Data collection, Design, Dynamic positioning systems, Energy efficiency, Food products, Navigation
Proceedings Papers

Numerical Hull Resistance and Hydrodynamic Characteristics of an Independently Rotating Multi-Hull Vessel

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Sharath Srinivasamurthy, Hiroshi Sakamoto, Tatsuo Nishikawa, Yasunori Nihei
Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A052, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95403
https://doi.org/10.1115/OMAE2019-95403
View Paper titled, Numerical Hull Resistance and Hydrodynamic Characteristics of an Independently Rotating Multi-Hull Vessel
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Topics: Hull, Vessels, Simulation, Computational fluid dynamics, Computer simulation, Pressure, Waves
Proceedings Papers

Weathervane Performance and Stability of Single Point Moored FOWTs Under Wind-Current Coexisting Field

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Sharath Srinivasamurthy, Kazuki Hashimoto, Kazuhiro Iijima, Yasunori Nihei
Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A019, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95404
https://doi.org/10.1115/OMAE2019-95404
View Paper titled, Weathervane Performance and Stability of Single Point Moored FOWTs Under Wind-Current Coexisting Field
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Topics: Mooring, Stability, Wind, Scanning probe microscopy, Eigenvalues, Oscillations, Scaling laws (Mathematical physics), Semi-submersible offshore structures, Spar platforms, Water
Journal Articles

Wave Drift Forces' Calculation on Two Floating Bodies Based on the Boundary Element Method—Attempt for Improvement of the Constant Panel Method

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Qiao Li, Yasunori Nihei
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research-Article
J. Offshore Mech. Arct. Eng. August 2019, 141(4): 041801.
Paper No: OMAE-17-1107
https://doi.org/10.1115/1.4042180
Published Online: January 17, 2019
View Article titled, Wave Drift Forces' Calculation on Two Floating Bodies Based on the Boundary Element Method—Attempt for Improvement of the Constant Panel Method
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Topics: Floating bodies, Wave drift forces, Waves, Boundary element methods, Integral equations
Proceedings Papers

Slewing Effect of Twin Vertical Axis Turbines Supported by a Floating Platform Able to Rotate Around a Single Mooring System

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Kazuma Kusanagi, Sharath Srinivasamurthy, Yasunori Nihei
Proc. ASME. OMAE2018, Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics, V009T13A004, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-78410
https://doi.org/10.1115/OMAE2018-78410
View Paper titled, Slewing Effect of Twin Vertical Axis Turbines Supported by a Floating Platform Able to Rotate Around a Single Mooring System
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Topics: Mooring, Turbines, Wind, Vertical axis wind turbines, Yaw, Computer simulation, Equations of motion, Ocean engineering, Physics, Renewable energy
Proceedings Papers

Energy Consumption of a Sailing Quad-Maran Automated Vessel

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Chenfang Zhang, Sharath Srinivasamurthy, Shinichi Kitamura, Norikazu Masuda, Choong Sik Park, Yasunori Nihei
Proc. ASME. OMAE2018, Volume 6: Ocean Space Utilization, V006T05A007, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-77946
https://doi.org/10.1115/OMAE2018-77946
View Paper titled, Energy Consumption of a Sailing Quad-Maran Automated Vessel
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Topics: Energy consumption, Vessels, Hull, Water, Design, Propulsion, Seas, Yaw
Proceedings Papers

Experimental Investigation of Negative Damping Effects for a TLP Type Offshore Wind Turbine

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Masaaki Aoki, Sharath Srinivasamurthy, Kazuhiro Iijima, Naoyuki Hara, Tomoki Ikoma, Yasunori Nihei
Proc. ASME. OMAE2018, Volume 10: Ocean Renewable Energy, V010T09A070, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-77256
https://doi.org/10.1115/OMAE2018-77256
View Paper titled, Experimental Investigation of Negative Damping Effects for a TLP Type Offshore Wind Turbine
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Topics: Damping, Offshore wind turbines, Tension-leg platforms, Wind turbines, Blades, Chain, Climate change, Control systems, Countermeasures, Energy generation
Proceedings Papers

Wave Load Acting on Advanced Spar in Regular Waves

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Takayuki Hirai, Akira Sou, Yasunori Nihei
Proc. ASME. OMAE2018, Volume 6: Ocean Space Utilization, V006T05A024, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-77821
https://doi.org/10.1115/OMAE2018-77821
View Paper titled, Wave Load Acting on Advanced Spar in Regular Waves
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Topics: Spar platforms, Stress, Waves, Wing spars, Morison equation, Computer simulation, Offshore wind turbines, Absorption, Boundary-value problems, Computational fluid dynamics
Proceedings Papers

Interaction Between Advanced Spar and Regular Waves

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Shingo Yamanaka, Takayuki Hirai, Yasunori Nihei, Akira Sou
Proc. ASME. OMAE2017, Volume 6: Ocean Space Utilization, V006T05A024, June 25–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2017-61788
https://doi.org/10.1115/OMAE2017-61788
View Paper titled, Interaction Between Advanced Spar and Regular Waves
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Topics: Spar platforms, Waves, Wing spars, Computational fluid dynamics, Computer simulation, Numerical analysis, Pressure, Absorption, Boundary-value problems, Computer software
Proceedings Papers

A Study on the Wave Drift Forces Calculation on Two Floating Bodies Based on the Boundary Element Method: Attempt for Improvement of the Constant Panel Method

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Qiao Li, Takashi Tsubogo, Yoshiho Ikeda, Yasunori Nihei
Proc. ASME. OMAE2016, Volume 7: Ocean Engineering, V007T06A104, June 19–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2016-54263
https://doi.org/10.1115/OMAE2016-54263
View Paper titled, A Study on the Wave Drift Forces Calculation on Two Floating Bodies Based on the Boundary Element Method: Attempt for Improvement of the Constant Panel Method
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Topics: Boundary element methods, Floating bodies, Wave drift forces, Fluids, Integral equations, Waves
Proceedings Papers

A Study on Motion Characteristics of Wind Turbine on a Floating Platform in Blade Pitch Control Malfunction

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Yuki Mizukami, Yasunori Nihei, Kazuhiro Iijima, Naoyuki Hara
Proc. ASME. OMAE2016, Volume 6: Ocean Space Utilization; Ocean Renewable Energy, V006T05A015, June 19–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2016-55025
https://doi.org/10.1115/OMAE2016-55025
View Paper titled, A Study on Motion Characteristics of Wind Turbine on a Floating Platform in Blade Pitch Control Malfunction
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Topics: Blades, Wind turbines, Control systems, Rotation, Rotors, Errors, Failure, Inertia (Mechanics), Mooring, Bevel gears
Proceedings Papers

Coupled Simulation Between Fast and Hydro-Structural Code for a Flexible FOWT Considering Blade Pitch Control Malfunction

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Sharath Srinivasamurthy, Kazuhiro Iijima, Yasunori Nihei, Naoyuki Hara
Proc. ASME. OMAE2016, Volume 6: Ocean Space Utilization; Ocean Renewable Energy, V006T05A009, June 19–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2016-54352
https://doi.org/10.1115/OMAE2016-54352
View Paper titled, Coupled Simulation Between Fast and Hydro-Structural Code for a Flexible FOWT Considering Blade Pitch Control Malfunction
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Topics: Blades, Simulation, Computer simulation, Control systems, Excitation, Failure, Numerical analysis, Offshore wind turbines, Rotors, Semi-submersible offshore structures
Proceedings Papers

Seaquake Loads Acting on Offshore Wind Turbine

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Katsunari Fujioka, Yasunori Nihei, Kazuhiro Iijima
Proc. ASME. OMAE2016, Volume 6: Ocean Space Utilization; Ocean Renewable Energy, V006T05A010, June 19–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2016-54492
https://doi.org/10.1115/OMAE2016-54492
View Paper titled, Seaquake Loads Acting on Offshore Wind Turbine
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Topics: Offshore wind turbines, Stress, Earthquakes, Tension-leg platforms, Seawater, Boundary element methods, Compressibility, Design, Floating structures, Flow (Dynamics)
Proceedings Papers

Discussion on Hybrid Utilization for Offshore Wind and Wave Energy

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Katsunari Fujioka, Yasunori Nihei, Marc Le Boulluec
Proc. ASME. OMAE2015, Volume 6: Ocean Space Utilization, V006T05A012, May 31–June 5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2015-41811
https://doi.org/10.1115/OMAE2015-41811
View Paper titled, Discussion on Hybrid Utilization for Offshore Wind and Wave Energy
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Topics: Ocean engineering, Wave energy, Wind, Waves, Computer simulation, Oceans, Offshore wind turbines, Stability, Wave energy converters, Wind turbines
Proceedings Papers

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

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Kazuhiro Iijima, Yuiko Kuroda, Yasunori Nihei, Motohiko Murai
Proc. ASME. OMAE2015, Volume 6: Ocean Space Utilization, V006T05A010, May 31–June 5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2015-41137
https://doi.org/10.1115/OMAE2015-41137
View Paper titled, Comparison of Weathervane Performance Between Two Types of FOWT Systems Moored to SPM
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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

Strongly Coupled Method for Predicting the Response of Flexible FOWT With Mooring and its Experimental Validation

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Chong Ma, Kazuhiro Iijima, Yasunori Nihei
Proc. ASME. OMAE2014, Volume 7: Ocean Space Utilization; Professor Emeritus J. Randolph Paulling Honoring Symposium on Ocean Technology, V007T05A023, June 8–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2014-24625
https://doi.org/10.1115/OMAE2014-24625
View Paper titled, Strongly Coupled Method for Predicting the Response of Flexible FOWT With Mooring and its Experimental Validation
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Topics: Mooring, Computer simulation, Simulation results, Tension, Waves, Wind, Offshore wind turbines, Stress, Tension-leg platforms