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Proceedings Papers

Two-Dimensional Numerical Analysis of Mean Wave Drift Loads on Two Fixed Boxes

Lei Tan, Tomoki Ikoma, Changhong Hu
Proc. ASME. OMAE2022, Volume 5A: Ocean Engineering, V05AT06A022, June 5–10, 2022
Paper No: OMAE2022-79910
DOI: https://doi.org/10.1115/OMAE2022-79910
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Topics: Computation, Computer simulation, Damping, Floating bodies, Numerical analysis, Pistons, Resonance, Shapes, Surges, Vessels
Proceedings Papers

Experimental Investigation of Roughness Effect on Flow Field Around Cylinder in Steady Flow

Masahiro Suzuki, Tomoki Ikoma, Chang-Kyu Rheem, Yasuhiro Aida
Proc. ASME. OMAE2022, Volume 4: Ocean Space Utilization, V004T05A030, June 5–10, 2022
Paper No: OMAE2022-79452
DOI: https://doi.org/10.1115/OMAE2022-79452
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Topics: Cylinders, Flow (Dynamics), Surface roughness, Water
Proceedings Papers

Motion Characteristics of a Floating Model With Moonpools for VAWTs

Tomoki Ikoma, Katsuhide Fujishima, Yasuhiro Aida, Tan Lei, Koichi Masuda
Proc. ASME. OMAE2022, Volume 4: Ocean Space Utilization, V004T05A017, June 5–10, 2022
Paper No: OMAE2022-79153
DOI: https://doi.org/10.1115/OMAE2022-79153
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Topics: Vertical axis wind turbines, Waves
Proceedings Papers

Scale and Configuration Effects of an Airchamber on PTO of Oscillating Water Column Type Wave Energy Converters

Tomoki Ikoma, Shota Hirai, Yasuhiro Aida, Koichi Masuda
Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A012, June 21–30, 2021
Paper No: OMAE2021-62173
DOI: https://doi.org/10.1115/OMAE2021-62173
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Topics: Oscillations, Water, Wave energy converters
Proceedings Papers

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

Saika Iwamatsu, Yasunori Nihei, Kazuhiro Iijima, Tomoki Ikoma, Tomoki Komori
Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A024, June 21–30, 2021
Paper No: OMAE2021-62662
DOI: https://doi.org/10.1115/OMAE2021-62662
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Topics: Mooring, Stability, Turning, Vertical axis wind turbines
Proceedings Papers

A Study on Performance Evaluation of Non-Reflective Boundary for Progressive Waves Reproduction Introduced in Numerical Wave Tank With MPS Method

Yasuhiro Aida, Tomotaka Takeo, Tomoki Ikoma, Koichi Masuda
Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A014, June 21–30, 2021
Paper No: OMAE2021-62364
DOI: https://doi.org/10.1115/OMAE2021-62364
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Topics: Particulate matter, Performance evaluation, Waves, Ocean engineering, Water, Absorption, Computer simulation, Energy dissipation, Position control, Reflection
Proceedings Papers

Experimental Study on the End Effect and the Effect Due to the Difference in End Shape of the Fluid Force Acting on a Rotating Cylinder in a Uniform Flow

Masahiro Suzuki, Tomoki Ikoma, Yasuhiro Aida, Chang-Kyu Rheem
Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A027, June 21–30, 2021
Paper No: OMAE2021-62589
DOI: https://doi.org/10.1115/OMAE2021-62589
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Topics: Cylinders, Flow (Dynamics), Fluids, Shapes, Water
Proceedings Papers

Development of a Simulation System for Estimating the Impact Force of Tsunami Drift Using the Explicit MPS Method

Yasuhiro Aida, Tomoki Ikoma, Koichi Masuda
Proc. ASME. OMAE2021, Volume 5: Ocean Space Utilization, V005T05A018, June 21–30, 2021
Paper No: OMAE2021-62244
DOI: https://doi.org/10.1115/OMAE2021-62244
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Topics: Simulation, Tsunamis
Proceedings Papers

Mean Wave Drift Force on a Barge-Type Floating Wind Turbine With Moonpools

Lei Tan, Tomoki Ikoma, Yasuhiro Aida, Koichi Masuda
Proc. ASME. OMAE2021, Volume 6: Ocean Engineering, V006T06A007, June 21–30, 2021
Paper No: OMAE2021-62241
DOI: https://doi.org/10.1115/OMAE2021-62241
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Topics: Floating wind turbines, Wave drift forces, Turbines, Vertical axis wind turbines, Waves, Yaw, Blades, Construction, Diffraction, Numerical analysis
Proceedings Papers

Study of Motion Performance of a Floating System With Four Moonpools and a VAWT

Lei Tan, Satsuya Moritsu, Tomoki Ikoma, Yasuhiro Aida, Koichi Masuda
Proc. ASME. IOWTC2021, ASME 2021 3rd International Offshore Wind Technical Conference, V001T01A001, February 16–17, 2021
Paper No: IOWTC2021-3511
DOI: https://doi.org/10.1115/IOWTC2021-3511
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Topics: Vertical axis wind turbines
Proceedings Papers

Study on Applicability of FEMA Formula in Prediction of Impact Load by Tsunami Drifting Vessels on Coastal Zone Structures

Koichi Masuda, Tomoki Ikoma, Hiroaki Eto, Yasuhiro Aida, Kazuki Murata
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A015, August 3–7, 2020
Paper No: OMAE2020-19088
DOI: https://doi.org/10.1115/OMAE2020-19088
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Topics: Collisions (Physics), FEMA, Shorelines, Stress, Tsunamis, Vessels
Proceedings Papers

Effects of Scale and Configuration of Air Chamber of OWC Type WECs on Air Chamber Characteristics

Tomoki Ikoma, Shota Hirai, Yasuhiro Aida, Koichi Masuda, Hiroaki Eto
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A014, August 3–7, 2020
Paper No: OMAE2020-18762
DOI: https://doi.org/10.1115/OMAE2020-18762
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Topics: Design, Ducts, Manifolds, Oscillations, Potential theory (Physics), Pressure, Probes, Shapes, Turbines, Water
Proceedings Papers

Characteristics of OWC Type WEC Dampers Installed on a Very Large Floating Structure

Tomoki Ikoma, Shoichiro Furuya, Yasuhiro Aida, Koichi Masuda, Hiroaki Eto
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A027, August 3–7, 2020
Paper No: OMAE2020-19002
DOI: https://doi.org/10.1115/OMAE2020-19002
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Topics: Dampers, Floating structures, Computational methods, Floating bodies, Oceans, Oscillations, Potential theory (Physics), Seawater, Water, Wave energy
Proceedings Papers

A Fundamental Study on Motion Characteristics of the Large-Scale Floating Coal Transshipment Station by Elastic Mooring Lines

Hiroaki Eto, Ryo Sekiguchi, Hitomi Kashima, Tomoki Ikoma, Yasuhiro Aida, Koichi Masuda
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A025, August 3–7, 2020
Paper No: OMAE2020-18958
DOI: https://doi.org/10.1115/OMAE2020-18958
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Topics: Coal, Mooring, Tension, Floating bodies, Tides, Chain, Ocean engineering, Oscillations, Pacific Ocean, Piers (Structural)
Proceedings Papers

On GIS Based Selection of Suitable Site Including Cooperation With Surrounding Medical Facilities by Mesh Analysis of Floating Medical Support System on Big Disaster

Hiroaki Eto, Sena Shimomoto, Sachio Togawa, Morikazu Yamamoto, Shintaro Miyasawa, Junko Yamaguchi, Tomoki Ikoma, Yasuhiro Aida, Koichi Masuda, Hiroki Udagawa
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A021, August 3–7, 2020
Paper No: OMAE2020-19026
DOI: https://doi.org/10.1115/OMAE2020-19026
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Topics: Biomedicine, Disasters, Earthquakes, Structures, Water, Damage, Rivers, Shorelines, Transportation systems, Cities
Proceedings Papers

A Fundamental Study on Plastic Strain Accompanying Deformation in Large-Scale Floating Coal Transshipment Station

Ryo Nishigochi, Hiroaki Eto, Koji Iizuka, Tomoki Ikoma, Yasuhiro Aida, Koichi Masuda
Proc. ASME. OMAE2020, Volume 5: Ocean Space Utilization, V005T05A026, August 3–7, 2020
Paper No: OMAE2020-18962
DOI: https://doi.org/10.1115/OMAE2020-18962
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Topics: Coal, Deformation, Breakwaters, Modeling, Stress, Stress concentration, Boundary-value problems, Floating bodies, Floating structures, Ocean engineering
Proceedings Papers

Effects of Four Moon Pools on a Floating System Installed With Twin-VAWTs

Tomoki Ikoma, Mitsuru Nakamura, Satsuya Moritsu, Yasuhiro Aida, Koichi Masuda, Hiroaki Eto
Proc. ASME. IOWTC2019, ASME 2019 2nd International Offshore Wind Technical Conference, V001T01A016, November 3–6, 2019
Paper No: IOWTC2019-7598
DOI: https://doi.org/10.1115/IOWTC2019-7598
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Topics: Vertical axis wind turbines
Proceedings Papers

A Basic Study on Influence of Airchamber Volume on OWC Models to Power Conversion Performance

Tomoki Ikoma, Yoshiyuki Kihara, Shota Hirai, Yasuhiro Aida, Koichi Masuda, Hiroaki Eto
Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A027, June 9–14, 2019
Paper No: OMAE2019-95925
DOI: https://doi.org/10.1115/OMAE2019-95925
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Topics: Energy conversion, Water, Pressure, Oscillations, Air flow, Design, Radiation (Physics), Turbines, Wave energy converters, Waves
Proceedings Papers

Response Characteristics of a Floating Structure With Moon Pools Installed With Vertical Axis Wind Turbines

Mitsuru Nakamura, Tomoki Ikoma, Hiroaki Eto, Yasuhiro Aida, Koichi Masuda
Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A028, June 9–14, 2019
Paper No: OMAE2019-96045
DOI: https://doi.org/10.1115/OMAE2019-96045
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Topics: Floating structures, Vertical axis wind turbines, Waves, Turbines, Green's function methods, Potential theory (Physics)
Proceedings Papers

Effect of Coal Loading Conditions on Structural Characteristics of LFTS

Hiroaki Eto, Koji Iizuka, Ryo Nishigochi, Tomoki Ikoma, Yasuhiro Aida, Koichi Masuda
Proc. ASME. OMAE2019, Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology, V009T13A047, June 9–14, 2019
Paper No: OMAE2019-96482
DOI: https://doi.org/10.1115/OMAE2019-96482
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Topics: Coal, Waves, Finite element methods, Ocean engineering, Stress concentration, Deformation, Design methodology, Displacement, Elasticity, Fracture toughness