中上层浮鱼礁最优单锚系泊方式研究

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潘昀,杨凤婷,毕春伟,李磊,周阳.中上层浮鱼礁最优单锚系泊方式研究[J].,2021,61(2):172-179

中上层浮鱼礁最优单锚系泊方式研究

Study of optimal mooring mode of single anchor for middle and upper layer floating fish attractor

DOI：10.7511/dllgxb202102008

中文关键词:浮鱼礁单锚系泊锚绳波浪分形维数

英文关键词:floating fish attractor single anchor mooring mooring line wave fractal dimension

基金项目:浙江省自然科学基金资助项目(LQ19E090007LQ20E090004)；国家自然科学基金资助项目(31972843).

作者	单位
潘昀,杨凤婷,毕春伟,李磊,周阳

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中文摘要:

中上层人工生境建设是我国南方海洋牧场发展模式的重要组成部分，以单锚系泊的中上层浮鱼礁为研究对象，探讨保证结构安全和聚鱼效果的最优锚泊方式．首先基于波浪水槽中浮鱼礁物理模型试验验证了现有数值模型的准确性．而后针对浮鱼礁单锚系泊方式，详述了数值模型中单锚系泊方式的处理方法和出水条件的判别方法，重点探讨了浮鱼礁浮架底部中心至锚绳结点的距离对浮鱼礁运动和受力的影响．为表征浮鱼礁摆动角度时历曲线复杂程度，引入了分形维数的概念．研究表明，浮鱼礁摆动角度时历曲线的分形维数能够定量描述波浪作用下浮鱼礁的动力响应规律．通过回归分析多工况摆动角度时历曲线的分形维数，得到最优的单锚系泊条件是浮鱼礁浮架底部中心至锚绳结点的距离与浮架高度的比值为0.59．

英文摘要:

The construction of middle and upper layer artificial habitat is an important part of the development mode of marine ranching in southern China. The middle and upper layer floating fish attractor with single anchor mooring is taken as the research object, and the optimal anchor mooring mode to ensure the structural safety and fish gathering effect is discussed. Firstly, based on the physical model test of floating fish attractor in a wave flume, the accuracy of the existing numerical model is verified. Then, for the single anchor mooring mode of floating fish attractor, the treatment method of single anchor mooring mode in the numerical model and the discrimination method of water outlet conditions are described in detail. The influence of the distance from the bottom center of the floating frame to the mooring line node on the motion and stress of floating fish attractor is discussed. In order to characterize the complexity of the swing angle duration curve of floating fish attractor, the concept of fractal dimension is introduced. The results show that the fractal dimension of the swing angle duration curve of floating fish attractor can quantitatively describe the dynamic response of floating fish attractor under wave action. Through regression analysis of the fractal dimension of the swing angle duration curve under multiple working conditions, the optimal single anchor mooring condition is that the ratio of the distance from the bottom center of the floating frame to the mooring line node to the height of the floating frame is 0.59.

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中上层浮鱼礁最优单锚系泊方式研究

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