| Project/Area Number |
59420033
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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 | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
1984 – 1985
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| Project Status |
Completed (Fiscal Year 1985)
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| Budget Amount *help |
¥27,500,000 (Direct Cost: ¥27,500,000)
Fiscal Year 1985: ¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 1984: ¥14,500,000 (Direct Cost: ¥14,500,000)
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| Keywords | Speed control of towing carriage / variable-width setting level of towing carriage / high performance ship / seakeeping quality / フィンスタビライザー |
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| Research Abstract |
The major aim of the project is to refine the towing carriage for more accurate multi-purpose experiments and to develop high performance ship considering a characteristics of ship motions.
1. Refinement and revision of the towing carraige
The following two revisions were carried out to enable new types of experiment using an offshore structure etc.: to grade up the speed control logic and curcuit, and to employ variable-width setting level and utility stage. The results are really satisfactory in respect of speed steadiness, stability at low speed operation, flexible speed alternation followed by an external signal etc.
2. Development of high performance ships
Although the definition of "a superior ship" is rather uncertain, she would behave equally good in waves as well as in calm sea. The following three experiments were performed to confirm it.
(i) Tank experiments in still water to refine stern form
(ii) Tank experiments in waves to estimate seakeeping quality of a ship
(iii) An experiment and a study on reduction of roll by fin-stabilizer
Each experiment and study would be highly valuable separately, with full utilization of refined towing carriage. The further approach to integrate and synthesize these studies, however, is more appreciated.
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