| 底层单拖网翼端间距的图谱计算法 |
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| 引用本文： | 陈志海,虞聪达,周怡彬.底层单拖网翼端间距的图谱计算法[J].浙江海洋学院学报(自然科学版),2006,25(4):393-396. |
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| 作者姓名： | 陈志海 虞聪达 周怡彬 |
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| 作者单位： | 1. 浙江海洋学院渔业学院,浙江舟山,316004
2. 乐清市水产科学研究所,浙江乐清,325600 |
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| 摘 要： | 底层单拖网的翼端间距是影响拖网系统捕捞效率的重要技术参数。根据单拖网的结构特点,上纲、曳纲和手纲的水动力特性,假定上纲形状是悬链线,上纲的垂直投影曲线与两手纲相切,通过纲索系统的力学模拟,建立拖网翼端间距与网板扩张距的关系,并将模拟得到的数据编制成L-D曲线图谱,用于拖网翼端间距的查算。
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| 关 键 词： | 底层单拖网 翼端间距 图谱计算法 |
| 文章编号： | 1008-830X（2006）04-0393-04 |
| 收稿时间： | 2006-10-11 |
| 修稿时间： | 2006年10月11 |
Curve Diagram Calculus on the Horizontal Expansion of Bottom Otter Trawl |
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| CHEN Zhi-hai,YU Cong-da,ZHOU Yi-bin.Curve Diagram Calculus on the Horizontal Expansion of Bottom Otter Trawl[J].Journal of Zhejiang Ocean University(Natural Science Edition),2006,25(4):393-396. |
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| Authors: | CHEN Zhi-hai YU Cong-da ZHOU Yi-bin |
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| Institution: | 1.Fishery College of Zhejiang Ocean University,Zhoushan 316004; 2.Fishery Science Institute of Yueqing City, Yueqing 325600, China |
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| Abstract: | The horizontal expansion of bottom otter trawl, especially the wingtip expansion, is one of the most important parameters affecting capture efficiency. Based on the hydrodynamic and mechanical properties of headline, warp and bridles and the properties of the net, assuming the headline to be catenaries and the projected shape of the headline to be tangential to the bridles, and through dynamics modeling of the line system, the relationships between the wingtip expansion and net door expansion were established. In addition, based on modeled data, the L-D curves were created which can be used in the calculus of the wingtip expansion of bottom otter trawl. |
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| Keywords: | bottom otter trawl wingtip expansion curve diagram calculus |
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