基于张力信号的深海网箱网纲损伤监测方法

doi:10.16183/j.cnki.jsjtu.2023.372

上海交通大学学报 ›› 2025, Vol. 59 ›› Issue (4): 550-560.doi: 10.16183/j.cnki.jsjtu.2023.372

• 船舶海洋与建筑工程 • 上一篇

基于张力信号的深海网箱网纲损伤监测方法

杨孟婕¹^,², 任浩杰¹^,²(), 任浩³, 许玉旺¹^,², 张萌萌¹^,²

1.上海交通大学海洋工程国家重点实验室,上海 200240
2.上海交通大学海洋装备研究院, 上海 200240
3.鹏城实验室数学与理论部,广东深圳 518055

收稿日期:2023-08-07 修回日期:2023-08-25 接受日期:2023-09-01 出版日期:2025-04-28 发布日期:2025-05-09
通讯作者: 任浩杰,任浩 E-mail:renhaojie@sjtu.edu.cn
作者简介:杨孟婕(1999—),硕士生,从事深海养殖网箱结构监测研究.
基金资助:
国家自然科学基金(52101323);国家自然科学基金(52271283);上海市自然科学基金(22ZR1434100);上海市教育委员会和上海市教育发展基金会“晨光计划”(22CGA10)

Damage Monitoring Method for Deep-Sea Net Cage Rope Structure Based on Tension Signal

YANG Mengjie¹^,², REN Haojie¹^,²(), REN Hao³, XU Yuwang¹^,², ZHANG Mengmeng¹^,²

1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Institute of Marine Equipment, Shanghai Jiao Tong University, Shanghai 200240, China
3. Department of Mathematics and Theories, Pengcheng Laboratory, Shenzhen 518055, Guangdong, China

Received:2023-08-07 Revised:2023-08-25 Accepted:2023-09-01 Online:2025-04-28 Published:2025-05-09
Contact: REN Haojie, REN Hao E-mail:renhaojie@sjtu.edu.cn

摘要/Abstract

摘要：

网衣系统是深远海大型网箱的重要组成部分,网纲线结构作为网衣系统的骨架,承担着网衣系统主要水动力载荷,针对其健康状态的监测至关重要.围绕网纲结构实时性损伤监测问题,构建网纲结构有限元数值模型,对比分析网纲完整及损伤状态下力学特性.结果表明:网纲发生破断损伤时,破损网纲线端部张力载荷急剧下降,相邻网纲线端部张力载荷则出现放大现象.基于这一张力载荷突变及破损网纲对无破损网纲载荷影响特征,定义了网纲张力相关系数、总影响值以及张力变化系数3个损伤识别参数,建立了基于网纲张力信号的实时损伤监测方法.该方法由张力变化系数出现极值阶跃判定网纲线破断编号,并由张力变化系数值与端部距破损位置距离成正比的规律确定破断网纲具体断裂位置.研究工作可实现实时网纲结构损伤监测,对深海养殖网箱的健康运维提供有益帮助.

关键词: 深海网箱, 损伤监测, 张力, 相关系数

Abstract:

The net system is an important component of the deep-sea net cages. As the bone structure of the net system, the rope structure bears the main hydrodynamic load of the net system, making the monitoring its health status essential. Aiming at the online damage monitoring of the rope structure, a finite element numerical model of the rope structure is developed, and the mechanical properties of the rope structure under intact and damaged conditions are compared and analyzed. The results show that when the rope is damaged, the end tension load of the damaged rope decreases sharply, while the end tension load of the adjacent rope increases. Based on the characteristics of these sudden tension changes and the influence of the damaged rope on the load of undamaged rope, three damage identification parameters are defined as the tension correlation coefficient, the total influence value, and the tension variation coefficient of the rope structure. Additionly, an online damage monitoring method based on rope tension signal is proposed. This method identifies the damaged rope by detecting an extremum step in the tension variation coefficient, and determines the specific damaged position by analyzing the proportion relationship between the tension change coefficient and the distance from the end to the damaged position. The research provides a reliable method for online monitoring of rope structure damage for the healthy operation and maintenance of deep-sea net cages.

Key words: deep-sea net cage, damage monitoring, tension, correlation coefficient

中图分类号:

TV36

杨孟婕, 任浩杰, 任浩, 许玉旺, 张萌萌. 基于张力信号的深海网箱网纲损伤监测方法[J]. 上海交通大学学报, 2025, 59(4): 550-560.

YANG Mengjie, REN Haojie, REN Hao, XU Yuwang, ZHANG Mengmeng. Damage Monitoring Method for Deep-Sea Net Cage Rope Structure Based on Tension Signal[J]. Journal of Shanghai Jiao Tong University, 2025, 59(4): 550-560.

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参考文献 19

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工况	模型	破断位置	U/(m·s^-1)
CASE0	完整网纲	—	0.25, 0.50, 0.75, 1.00
CASE1~45	单根网纲破断	Y向网纲	0.25, 0.50, 0.75, 1.00
CASE46~90	单根网纲破断	X向网纲	0.25, 0.50, 0.75, 1.00

基于张力信号的深海网箱网纲损伤监测方法

Damage Monitoring Method for Deep-Sea Net Cage Rope Structure Based on Tension Signal

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