The sinking performance of the tuna purse seine gear with large-meshed panels using numerical method
The sinking performance of the tuna purse seine gear with large-meshed panels using numerical method
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DOI：
10.1007/s12562-011-0371-6
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发表时间：
2011-07-01
影响因子：
1.9
通讯作者：
Lee, Gun-Ho
中科院分区：
文献类型：
--
作者：
Hosseini, Seyed Abbas;Lee, Chun-Woo;Lee, Gun-Ho
本文对围网渔具三维动力学模拟的数值方法进行了改进。改进是通过改进质量弹簧模型来实现的，以考虑到阻力系数作为攻角和雷诺数的函数，应用于围网齿轮的设置操作。数值模拟的有效性进行了评估，通过比较的测量值和计算值的网的下沉深度。采用数值模拟的方法，研究了在网片主体部分采用大型网片和网片材料的不同设计方案的下沉性能。结果表明，与原型网相比，当使用较重的网状材料时，承载较大网格面板的网在捕鱼操作的相应时间需要更大的下沉深度和更显著的操作深度。此外，在新的网设计中，在pursing期间，在纯丝的两端上施加较低的张力。作业深度方面的新网结构是可能减少金枪鱼围网渔具经常失败的潜在问题的替代方案。
This paper reports an improved version of the numerical method used in a previous study on the dynamic simulation of purse seine gear in three dimensions. The improvement is achieved by refining the mass-spring model to take into account both the drag coefficient as a function of the attack angle and Reynolds number as applied to the setting operation of the purse seine gear. The validity of the numerical simulation is assessed by comparing the measured and calculated values for the sinking depth of the net. The numerical simulation is used to examine the sinking performance of the different designs in which large meshed-panels and netting materials are used together in the main body section of the netting. The results indicate that, compared to the prototype net, nets bearing larger mesh panels require more sinking depth with much more pronounced operational depth at corresponding times of the fishing operation when heavier netting material is used. Moreover, in the new net designs, lower tensile forces are exerted on both ends of the pure wire during pursing. The new net constructions with regard to the operational depth represent alternatives that may reduce the potential problem of frequent failed setting of the tuna purse seine gear.