1993 Fiscal Year Final Research Report Summary
RESEARCH ON A PRACTICAL PREDICTION METHOD FOR SHIP MANOEUVRABILITY CONSIDERING WITH SHIP FORM
| Project/Area Number |
04555103
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
船舶抵抗・運動性能・計画
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
KIJIMA Katsuro KYUSHU UNIVERSITY, FACULTY OF ENGINEERING PROFESSOR, 工学部, 教授 (90038042)
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| Co-Investigator(Kenkyū-buntansha) |
FURUKAWA Yoshitaka KYUSHU UNIVERSITY, FACULTY OF ENGINEERING LECTURER, 工学部, 講師 (90253492)
OHKUSU Makoto KYUSHU UNIVERSITY, INSTITUTE OF APPLIED MECHANICS, PROFESSOR, 応用力学研究所, 教授 (70038537)
FUJINO Masataka UNIVERSITY OF TOKYO, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (10010787)
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| Project Period (FY) |
1992 – 1993
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| Keywords | Hydrodynamic force / Manoeuvrability / Orediction / Slender Body Theory / Vortex Model / Cross flow Drag |
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| Research Abstract |
It will be very important ot estimate the hydrodynamic force acting on a ship for predicting ship manoeuvring characteristics by using mathematical model. This hydrodynamic force depends on especially the ship's form then it needs to estimate the hydrodynamic force acting on ship considering sufficiently with ship's form such as the frame line with high accuracy.
On the hydrodynamic force, we estimated by using the slender body theory, and examined the flow pattern and generation point of free vortex. According to the investigated results, we can estimate the hydrodynamic force acting on a ship by considering with the generation point of free vortex. This generation point of the vortex should be decided as function of the hull form.
Furthermore, this research investigated the cross sectional aspect of round edge effects on cross flow drag acting on rectangular cross section, which are theoretically investigated using of vortex model. From the results of numerical calculations, cross flow drag acting on rectangular cross section decrease abruptly as increasing corner radius, especially for the sections with a breadth to height ratio becoming larger.
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