2002 Fiscal Year Final Research Report Summary
Hydrodynamic Forces Acting on a Ship Hull under Lateral Low Speed Motion
| Project/Area Number |
12650900
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
船舶工学
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| Research Institution | Osaka University |
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Principal Investigator |
TODA Yasuyuki Osaka University, Dept. of Global Architecture, Associate professor, 大学院・工学研究科, 助教授 (20172166)
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| Project Period (FY) |
2000 – 2002
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| Keywords | Lateral Low speed motion / Hydrodynamic force / Tug boat / CFD / Added mass / shallow wayer |
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| Research Abstract |
The berthing maneuver of ships is usually carried out in the low lateral moving speed and in the short distance to a berth. Hydrodynamic forces acting on the ship hull under the berthing maneuver have quite complex and transitional characteristics.
In this research, the CFD technique has been used to understand the transitional fluid phenomena. By comparing the time-domain computation and the very precise experiment, the feasibility and validation of CFD was demonstrated.
The results for the shallow water were also obtained and the transitional effect is large and observed in the long time. These results were used to model the transitional hydrodynamic force. The invisid computations were also done to get the added mass. The simplified formula for the ship principal dimensions and water depth was proposed.
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