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Design evaluation of a fish cage mooring system with different bridle line connections using model experiments and simulations
Aquacultural Engineering ( IF 4 ) Pub Date : 2021-06-20 , DOI: 10.1016/j.aquaeng.2021.102177
Subong Park , Jihoon Lee , Chun-Woo Lee

Because fish cage systems are strongly influenced by various marine environmental conditions such as currents and waves, structural safety design is of crucial importance during their installation. It is particularly important to design a technical solution for a mooring system. In this study, we designed four types of fish cage systems with different bridle connection arrangements (two single-rope and two multiple-rope connection methods) to evaluate the structural safety of fish cage systems based on the bridle connection arrangement and to propose an efficient design direction. The level of the structural safety of the fish cage system in terms of the resistance force, shape, and inside volume reduction ratio was found to vary according to the position of the frame lines connected to the bridle lines, the number of bridle lines, and the angle between the frame line and the direction of currents and waves. Improved structural safety was observed when the bridle lines were connected to the midpoints of the frame lines compared to those connected to the vertices, and the multiple-rope connection method was found to provide higher structural safety than the single-rope connection method. Increased fish cage system structural safety was also confirmed when the frame line orientation was 90° to the direction of currents and waves compared to that at 45°. From these findings, it can be concluded that the structural safety of a fish cage system can be improved by using multiple bridle lines to disperse the tension of the mooring lines connected to the frame lines and by installing the fish cage with the frame lines aligned at an angle that minimizes the projected area exposed to currents and waves. Moreover, the simulation technique presented in this study is expected to contribute to the efficient evaluation of the structural safety of various fish cage mooring systems designed using multiple-rope connection methods, accounting for the number and position of bridle lines connected on a frame line.



中文翻译:

使用模型实验和模拟对具有不同缰绳连接的鱼笼系泊系统进行设计评估

由于鱼笼系统受到各种海洋环境条件(例如海流和波浪)的强烈影响,因此在安装过程中结构安全设计至关重要。为系泊系统设计技术解决方案尤为重要。在本研究中,我们设计了四种具有不同吊索连接布置(两种单绳和两种多绳连接方法)的鱼笼系统,以评估基于吊索连接布置的鱼笼系统的结构安全性,并提出一种有效的方法。设计方向。发现鱼笼系统在阻力、形状和内部容积减少率方面的结构安全水平根据连接到缰绳的框架线的位置、缰绳数量、以及框架线与水流和波浪方向之间的角度。与连接到顶点的那些相比,当缰绳连接到框架线的中点时,观察到结构安全性有所提高,并且发现多绳连接方法比单绳连接方法提供更高的结构安全性。与 45° 相比,当框架线方向与水流和波浪方向成 90° 时,也证实了增加的鱼笼系统结构安全性。从这些发现中,可以得出的结论是,通过使用多条索缆来分散连接到框架线的系泊索的张力,以及安装鱼笼时框架线以最小化的角度对齐,可以提高鱼笼系统的结构安全性。暴露在洋流和波浪中的投影面积。此外,本研究中提出的模拟技术有望有助于有效评估使用多绳连接方法设计的各种鱼笼系泊系统的结构安全性,考虑到连接在框架线上的缰绳的数量和位置。

更新日期:2021-06-22
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