1994 Fiscal Year Final Research Report Summary
Study on Estimatiing Method for Sea-keeping Qualities of High-speed Vessel
| Project/Area Number |
04402037
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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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 | HIROSHIMA UNIVERSITY |
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Principal Investigator |
TAKAKI Mikio Hiroshima University, Engineering, Professor, 工学部, 教授 (00038556)
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| Co-Investigator(Kenkyū-buntansha) |
LIN Xin Hiroshima University, Engineering, Research Associate, 工学部, 助手 (20263725)
IWASHITA Hidetsugu Hiroshima University, Engineering, Associate Professor, 工学部, 助教授 (60223393)
HIGO Yasushi Hiroshima University, Engineering, Associate Professor, 工学部, 助教授 (20156582)
SAITO Kimio Hiroshima University, Graduate School for International Development and Cooperat, 大学院・国際協力研究科, 教授 (50029279)
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| Project Period (FY) |
1992 – 1994
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| Keywords | High-speed vessel / Seakeeping qualities / Two and half dimensional theory / Green function method / Pankine panel method / Strip method / Practical calculation method |
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| Research Abstract |
We have studied on estimating method for sea-keeping qualities for high-speed vessel in waves since 1992. The main conclusions obtained in this study are summarized as follows :
(1) Strip theory is valid for the ship speed of less than Fn=0.4, and the estimating accuracy worsens at the ship speed of more than Fn=0.4.
(2) The end term effect in strip theory can not be neglected for a high-speed vessel with a transomstern.
(3) The 2 and half dimensional theory, which is called the high-speed slenderbody theory (HSST), is the most useful method for estimation of seakeeping qualities of high-speed vessel from both a practical standpoint and a standpoint of estimating accuracy.
(4) The three-dimensional Green function method has some numerical problems such as the treatment of line integral, a free surface condiotion, the number of discretized panels and CPU time which should be improved in the near future.
(5) The rankine source method is to be the most promising theory, because it has merits which we can change a free surface condition etc. However, the treatment of steady disturbance around the transom stern of a high-speed vessel should be improved
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