Previous Articles     Next Articles

Hook depth of pelagic longline based on ANSYS Workbench simulation

  

  1. (1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; 
    2. National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China)
  • Online:2021-08-20 Published:2021-10-14

基于ANSYS Workbench力学仿真的金枪鱼延绳钓钓钩深度

  1. （1上海海洋大学海洋科学学院，上海 201306；
    2 国家远洋渔业工程技术研究中心, 上海201306）
  • 作者简介:宋利明（1968—），教授，博士，研究方向：捕捞学。E-mail: lmsong@shou.edu.cn
  • 基金资助:
    国家重点研发项目（2020YFD0901205）；2016年农业农村部海洋渔业资源调查与探捕项目（D-8006-16-8045）

PDF

Abstract: Hook depth has significant influence on pelagic longline catch performance. This study conducted two-way fluid-structure coupling simulation by using the numerical simulation software ANSYS Workbench 19.2 for tuna pelagic longline which was modeled by Tauti Criterion. In addition, 42 hook depth data measured from tuna pelagic longline operations at 6 survey stations in the high seas near Polynesia Islands (4°S~15°S, 140°W~160°W) in 2016 were compared with the numerical simulation hook depth based on ANSYS Workbench. SPSS t-test was used to analyze the difference between measured hook depth and numerical simulation hook depth. The results show that, the simulated deepest hook depth of pelagic longline is 280~310m, and the hook depth is negatively correlated with velocity. When velocity is low (X=-0.11~0.05 m/s; Y=-0.05~0.03 m/s; Z=0.03~0.11 m/s）, the simulated deepest hook depth is about 310 m. When velocity is high (X=0.28~0.75 m/s; Y=-0.10~0.52 m/s; Z=0.04~0.13 m/s）, the simulated deepest hook depth is about 280 m. There is no significant difference between the simulated and measured hook depth (P=0.241 > 0.05), nor significant difference between the simulated and measured hook depth at each station (P1=0.790, P2=0.337, P3=0.476, P4=0.369, P5=0.175, P6=0.136). The results suggest that the developed longline fishing gear model based on Tauti Criterion and ANSYS Workbench numerical simulation software can be used in the study of longline hook depth.

Key words: Longline, hook depth, ANSYS workbench, simulation, tuna

摘要： 钓钩深度对金枪鱼延绳钓渔获性能有重要影响，本研究基于田内准则对延绳钓渔具进行缩小，采用ANSYS Workbench 19.2数值仿真软件对金枪鱼延绳钓进行双向流固耦合仿真，并选取2016年波利尼西亚群岛附近海域（4°S~15°S，140°W~160°W）金枪鱼延绳钓作业实测的6个作业站点42枚钓钩深度数据与ANSYS Workbench数值仿真结果进行对比，应用SPSS t-检验分析实测钓钩深度与数值仿真深度的差异性。结果表明：延绳钓最深钓钩仿真深度为280~310 m，钓钩深度与海流速度呈负相关。海流速度较小时（X=-0.11~0.05 m/s； Y=-0.05~0.03 m/s； Z=0.03~0.11 m/s），钓钩仿真深度较深，最深钓钩深度为310 m；海流速度较大时（X=0.28~0.75 m/s；Y=-0.10~0.52 m/s； Z=0.04~0.13 m/s），钓钩仿真深度较浅，最深钓钩深度为280 m。数值仿真钓钩深度与实测钓钩深度无显著性差异（P=0.241＞0.05）且各个站点钓钩仿真深度与实测深度均无显著性差异（P1=0.790，P2=0.337，P3=0.476，P4=0.369，P5=0.175，P6=0.136）。研究表明，基于田内准则对延绳钓渔具进行缩小，采用ANSYS Workbench力学仿真软件可用于延绳钓钓钩深度研究。

关键词: 延绳钓, 钓钩深度, ANSYS workbench, 仿真, 金枪鱼