摘要
中层拖网是开发利用中上层鱼类资源的重要工具之一,能否有效实施对拖网作业水层的控制,是实现瞄准捕捞和提高捕捞生产效率的关键。本文提出了1种基于有限元原理的拖网曳纲形状与张力的理论计算方法,以期依据中层拖网拖曳过程中不同拖速、曳纲长度和重锤配备条件下曳纲响应的计算机模拟结果,预测拖网可能的作业水层,以实现中层拖网网位控制,为中层拖网曳纲设计和网位调整提供理论依据。
Midwater trawls are one of the most efficient fishing tools for exploiting pelagic fish resources. It is very important to control the position of the trawl vertically to suit the depth of the fish shoal for aimed trawling and fishing efficiency improvement. In this article, a new model based on a finite element method has been suggested to evaluate the shape andtension of the warp of the midwater trawl. According to the simulation results of warp, it is possible to predict and control the position of the trawl. As an example, the effects of changing towing speed, warp length and sinker weight on the trawl position control are demonstrated.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第1期61-64,6,共5页
Periodical of Ocean University of China
基金
国家自然科学基金项目(40576045)
教育部博士点基金项目(20040423007)
山东省优秀中青年科学家奖励基金资助
关键词
中层拖网
网位控制
静力学解析
数值模拟
mid-trawl
position control
static analysis
numerical simulation
