| 漂浮状态下重力式及碟形网箱锚绳受力特性的比较 |
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| 引用本文： | 李玉成.漂浮状态下重力式及碟形网箱锚绳受力特性的比较[J].水产学报,2005,29(4):570-573. |
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| 作者姓名： | 李玉成 |
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| 作者单位： | 1. 大连理工大学海岸和近海工程重点实验室,辽宁,大连,116024
2. 中国科学院力学研究所,北京,100080 |
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| 基金项目： | 国家自然科学基金资助项目（编号50279002）;海洋863计划项目（2001AA623010,2003AA623010） |
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| 摘 要： | 深水网箱养殖是海洋牧场建设的重要手段之一，在其发展及应用过程中出现了多种结构形式，其中以重力式和碟形深水网箱应用最为普遍，国内外关于网箱的水动力特性已进行了不少研究，但结果存在较大差异。Colboume等曾对多种配重形式和锚碇形式的重力式网箱的水动力特性及运动特性进行试验，
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| 关 键 词： | 重力式网箱 碟形网箱 锚绳 受力特性 |
| 文章编号： | 1000-0615（2005）04-0570-04 |
| 收稿时间： | 2004-06-11 |
| 修稿时间： | 2004年6月11日 |
Comparison on the force characteristics of mooring lines between gravity cage and sea station cage under floating condition |
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| LI Yu-cheng.Comparison on the force characteristics of mooring lines between gravity cage and sea station cage under floating condition[J].Journal of Fisheries of China,2005,29(4):570-573. |
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| Authors: | LI Yu-cheng |
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| Institution: | The State Key Laboratory of Coastal and Offshore Engineering of Dalian University of Technology, Dalian 116024,China |
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| Abstract: | This paper focused on the force characteristics of mooring lines of the common used gravity cage and sea station cage under floating status. In this experiment, total four cage models were designed which included two gravity cage models, one sea station cage model and one quasi-sea station cage model. The gravity cages were made of the same materials but with different weighting system configurations. The sea station cage model and the quasi-sea station cage model were of the same diameter but the latter is 1.4 times in cage height to the former one which attributed greatly to the amplification of effective aquaculture volume up to 2.2 times. Four mooring lines were attached to each cage model on one side and the other side fixed on the bottom of the wave-current tank. Several kinds of experiment conditions were set, including pure current conditions, pure wave conditions and combined wave-current conditions. Forces were measured by four transducers attached to the bottom of the mooring lines respectively. Analysis was based on the resultant forces of the two current-ward or wave-ward mooring lines. Results from this study were presented and statically analyzed revealing that the quasi-sea station cage model suffered from greater forces compared with the other two kinds of cage models, which was more apparent under pure current conditions. It was interesting to find that the mass of the weighting system turned out to be relatively small effect on the forces acting on the gravity cage models under most conditions. Under pure wave conditions, several results of the forces acting on the gravity cage with heavier weighting system configuration were even smaller than those with lighter weighting system configuration. Conclusions were drawn that it was feasible to increase the mass of the weighting system properly to reduce the deformation of the netting system since it will not increase the forces acting on the gravity cages apparently. But it should be kept in mind that the operation of the cage will be affected directly by increasing the mass of the weighting system. As to sea station cage model, given the similar maximum aquaculture volume, results showed that the forces acting on it were approximately the same with that of gravity cages under the same conditions. But its huge size would lead to bad operation directly. Thus, when considering the force characteristics, the performance and management of the cages together with the cage prices, the co-authors recommended that gravity cages were more suitable currently as deep-water aquaculture facilities in China. |
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| Keywords: | gravity cage sea station cage mooring line force characteristics |
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