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A model experiment on the characteristic of fishing gear of lampara net with various hanging ratios

机译：不同悬挂比的兰帕拉网渔具特性的模型试验

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摘要

The goal of this study is to develop a proper design for the surrounding net of a stern fishing system. The experiments using the simplified model lampara net by various hanging ratios (E=0.5, 0.6, 0.7, 0.8, and 0.9) were carried out to analyze the sinking characteristics under static water conditions, and to observe the shape of the models being flowed.The sinking speed of the model nets was different according to measuring points and the hanging rations. In the final depth of lead line, the model net with E=0.9 reached the deepest but the ones with E=0.7 and E=0.8 barely reached the designed depth. The moved distance of the model net until the opening area formed by its lead line slightly closed, was not different in all hanging ratios except E=0.8. These results suggest that the optimum hanging ratio of surrounding net for stern fishing system is E=0.7.
机译：这项研究的目的是为船尾捕捞系统的周围网发展适当的设计。使用简化模型的兰帕拉网以各种悬挂比（E = 0.5、0.6、0.7、0.8和0.9）进行了实验，以分析静态水条件下的下沉特性，并观察流动模型的形状。模型网的下沉速度根据测量点和悬挂比率而有所不同。在引线的最终深度中，E = 0.9的模型网达到最深，而E = 0.7和E = 0.8的模型网几乎未达到设计深度。模型网直到由其引线形成的开口区域略微闭合为止的移动距离，除E = 0.8以外，在所有悬挂比率上均无差异。这些结果表明，船尾捕捞系统的最佳围网悬挂比为E = 0.7。

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