2023 Fiscal Year Final Research Report
Multiphysics modelling and experimental verification of a suspension ship running at head seas
| 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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| Keywords | Suspension Ship / Motion Control / Catamaran / Numerical Analysis / Transverse Stability / Ship Design / Model Experiment / Hydrodynamic Coefficient |
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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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| Free Research Field |
船舶海洋工学関連
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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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