| Project/Area Number |
21K14363
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 24020:Marine engineering-related
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| Research Institution | Yokohama National University (2022-2023)
Osaka Prefecture University (2021) |
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Principal Investigator |
Han Jialin 横浜国立大学, 大学院工学研究院, 助教 (40814877)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | Suspension Ship / Motion Control / Catamaran / Numerical Analysis / Transverse Stability / Ship Design / Model Experiment / Hydrodynamic Coefficient / suspension ship / motion control / model experiment / ride comfort / hydrodynamics / catamaran / ship design / numeical analysis / Suspension ship / Multiphysics modelling / Motion reduction / Ship motion control / Wave energy harvesting / multiphysics modelling / multibody dynamics / ship motion control / skyhook control |
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| Outline of Research at the Start |
Suspension is widely used for ride comfort improvement. In this research, a multibody dynamic simulation model of a suspension ship is developed and verified by towing tank experiment. A deep insight into the interaction mechanism and characteristics of suspension ships is expected to be provided.
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| Outline of Final Research Achievements |
This study investigates the motion responses of a suspension catamaran in head waves, employing a combination of numerical calculations and experimental validation. Hydrodynamic coefficients and wave-exciting forces/moments acting on the twin-hull were determined using the OrcaWave. An estimation method was introduced to extrapolate wave-exciting forces/moments at varying advancing speeds based on data derived at zero speed. Reasonable agreement is obtained between the experiments and calculation regarding the heave and pitch motion responses of both the cabin and the hull. Moreover, the impact of the design parameters specific to suspension ships on the initial transverse stability is numerically investigated. It is found that enhancing the initial transverse stability can be achieved through several means: decreasing the mass ratio between the sprung and unsprung bodies, reducing the loaded height of the suspension, and increasing the beam of the ship.
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| Academic Significance and Societal Importance of the Research Achievements |
This research could offer a valuable understanding of the multidisciplinary mechanisms governing the motion dynamics of suspension ships, and stimulate the development of innovative marine suspension technology to improve safety by understanding the influence of design parameters on stability.
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