WEKO3
アイテム
水産増養殖施設の水力学的研究
https://fra.repo.nii.ac.jp/records/2007722
https://fra.repo.nii.ac.jp/records/200772246af9313-9984-47c7-a2b0-1d65e982c1a7
| アイテムタイプ | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
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| 公開日 | 2024-06-18 | |||||||||||
| タイトル | ||||||||||||
| タイトル | 水産増養殖施設の水力学的研究 | |||||||||||
| 言語 | ja | |||||||||||
| タイトル | ||||||||||||
| タイトル | Hydraulic Studies on the Aquacultural Facilities | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | jpn | |||||||||||
| 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 | |||||||||||
| アクセス権 | ||||||||||||
| アクセス権 | metadata only access | |||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||
| 著者 |
上北, 征男
× 上北, 征男
WEKO
3516
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | This paper deals the hydraulic problems of the aquacultural facilities. The basic equation of the hydraulic force acting to be object in fluid is shown by Eq. (1.1) The hydraulic force of the aquacultural facilities can be analysed by the boundary conditions. In section 2, we dealed the estimation of the impact forces which act on a prefabricated body, such as artificial fish scheme and the forces which influenced mutually on the submerged beem. At the moment that the fallen body collides with the bottom, its equation of motion is givn by : From Eq. (2.10), one can obtain Emax by Newton -Raphson method, for example, so the maximum reaction Rnax can be obtained. As to facilitate the calculation, the authors assume that the impact force results increase of the unit weight of the body and get the specific weight σɢ when the body impact the bottom. With an experiamental apparatus shown as Fig. (2.2), the two σɢ values, one from Eqs. (2.10) and (2.14) with v₀, and another from Fig. 2.7 with Rmax are compared and show good agreement each other as shown Fig (2.8). The impact force to the artificial fish scheme is get from Eqs. (2.11) and (2.14). The force acting on the body in the fluid is get from Eq (1.1) as U=0, when the equation of the motion is shown by Eq. (2.39) The experiment was development for horizontal circular cylinders near a plane boundary with a wave direction parallel to the boundary and perpendicular to the cylinders. In section 3, the author deals the wave force on the hanging line for the shell culture. The author formulated the motion of a hanging line as Eq. (3.1) The vertical force per unit length of line is expressed by Eq. (3.14) which is required to apply the small amplitude wave theory to Eq. (3.2) The comparion of the calculated values given by Eq. (3.14) with the experimental values is shown in Fig. 3. 4. Experimental values agree well with the theoretical results. Accodingly, the vertical tension acting on the upper part of the hanging line is given by Eq. (3.14). The designed force on the floating facilities for the shell culture is standardized. In section 4, the authors deals the mechanism of the absorption by the mooring buoy, set on between the floating body and the mooring cable. The theory hypothesized the following. 1. The movement length of buoy is so small compared to the cable length L that the degree of movement dθ is negligible. 2. The elongation of the cable does not effect to the absorption of the impact. 3. The weight of the cable and drag force on the cable are neglected. Then, the cquation of the buoy motion is given by Eq. (4.1). The force F, acting on the buoy by floating buoy is given by Eq. (4.2). The maximum acting force Fmax is given by the subsitution of Eq. (4.2) into Eq. (4. 1). And, the tention Tmax on the mooring cable is given by Eq. (4.15). The experimental values are in satisfactory agreement with the theoretical values. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
ja : 水産工学研究所報告 en : Bulletin of National Research Institute of Fisheries Engineering 巻 3, p. 67-100, ページ数 34, 発行日 1982-03 |
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| 出版者 | ||||||||||||
| 出版者 | 水産工学研究所 | |||||||||||
| 言語 | ja | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | National Research Institute of Fisheries Engineering | |||||||||||
| 言語 | en | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||
| 収録物識別子 | 0388-9718 | |||||||||||
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| 収録物識別子タイプ | NCID | |||||||||||
| 収録物識別子 | AN00332937 | |||||||||||
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| 識別子タイプ | Local | |||||||||||
| 関連識別子 | nrife_k_3_67 | |||||||||||
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| 関連タイプ | isIdenticalTo | |||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010254358 | |||||||||||
| 言語 | ja | |||||||||||
| 関連名称 | 日本農学文献記事索引 | |||||||||||
| 言語 | en | |||||||||||
| 関連名称 | agriknowledge | |||||||||||
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| 関連タイプ | isSupplementedBy | |||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://fra.repo.nii.ac.jp/records/2015649 | |||||||||||
| 言語 | ja | |||||||||||
| 関連名称 | 水産工学研究所報告 3号正誤表 | |||||||||||
