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Model Experiments on Small Trawls Feasibility Study on the Double Rigged Versus Single Rigged Type
http://hdl.handle.net/10232/15644
http://hdl.handle.net/10232/156441b6deb5a-5794-4f54-8755-094f3678fb38
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
AN00181784_v4-2_p200-214.pdf (5.3 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2013-01-22 | |||||
| タイトル | ||||||
| タイトル | Model Experiments on Small Trawls Feasibility Study on the Double Rigged Versus Single Rigged Type | |||||
| タイトル言語 | en | |||||
| 著者 |
ASHIRIN, Zainal
× ASHIRIN, Zainal× 今井, 健彦 |
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| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | This paper provides a general feasibility study on double rigged versus single rigged trawls. This study used model experimental nets tested in a circulating water tank. Three kinds of trawls were tested, i.e. the Mexican semi ballon double rigged shrimp trawl designed by Nichimo (hereafter called net A), the traditional two seam single rigged Malaysian shrimp trawl (net B) and the four seam trawl modified from the above Malaysian trawl (net C). The head rope length of net A is about half that of net B and net C. Primary objectives are to determine physical characteristics, working performance and to estimate the main engine output necessary to pull these nets. To provide a double rigged shrimp trawl in the Malaysian shrimp fisheries, results of experiments are summarised as follows: |
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| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 1) At 2 knots, which is a normal towing speed of a Malaysian shrimp trawler, net mouth height of net A is 1.2 meter, net B is 2 meter and net C is 1.8 meter. In accordance to the behaviour of shrimp, these net mouth height are sufficient. |
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| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 2) In order to ensure the security of the catch, the most efficient average mesh opening was determined to be five vertical cross-sections. The mesh opening is bigger at the square panel and becomes smaller towards the cod end. The opening is about 3 centimeter for 5.7 centimeter mesh size. |
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| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 3) The wing tip spread of net A is 11 meter, which is 80% of its head rope length. Net B is 14 meter (55%) and net C is 14.4 meter (60%). |
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| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 4) The working performance of a shrimp trawl is determined by its sweeping area. The obtained experimental equations of the sweeping area of the three net are slimplified as follows: |
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| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 2 net A: A's=2.18V | |||||
| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | net B: A"s=1.57V | |||||
| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | net C: A‴s=1.58V | |||||
| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 5) The estimation of suitable main engine output necessary to pull the net is calculated from the conversion of total gear drag force values to horse power values. Equations of the above power of the three nets are: |
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| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 2 net A: EHP'=12.19V^<2.79> | |||||
| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | net B: EHP"=11.01V^<2.68> | |||||
| 内容記述言語 | en | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | net C: EHP‴=10.89V<2.61> | |||||
| 内容記述言語 | en | |||||
| 収録雑誌名 |
ja : 南海研紀要 en : Memoirs of the Kagoshima University Research Center for the South Pacific 巻 4, 号 2, p. 200-214, 発行日 1984-03-10 |
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| 作成日 | ||||||
| 日付 | 1984-03-10 | |||||
| 日付タイプ | Issued | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| ISSN | 03895351 | |||||
| NII書誌ID（雑誌） | ||||||
| 収録物識別子タイプ | NCID | |||||
| NC ID | AN00181784 | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| NDC | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 660 | |||||
| 公開者・出版者 | ||||||
| 出版者 | 鹿児島大学 | |||||
| 出版者言語 | ja | |||||
| 公開者・出版者 | ||||||
| 出版者 | Kagoshima University | |||||
| 出版者言語 | en | |||||
