文献类型：期刊文献

英文题名：Study on Dynamic Characteristics and Fracture Failure of Rigid Truss Trawl System During Towing Process

作者：Zhang, Dapeng[1];Zhao, Bowen[2];Zhang, Yi[1];Zhu, Keqiang[3];Yan, Jin[1,4]

机构：[1]Guangdong Ocean Univ, Ship & Maritime Coll, Zhanjiang 524005, Peoples R China;[2]St Petersburg State Marine Tech Univ, Dept Appl Math & Math Modeling, St Petersburg 190121, Russia;[3]Ningbo Univ, Fac Maritime & Transportat, Ningbo 315211, Peoples R China;[4]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China

年份：2025

卷号：13

期号：3

外文期刊名：JOURNAL OF MARINE SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001453178100001)、、EI(收录号：20251318133959)、Scopus(收录号：2-s2.0-105001029595)、WOS

基金：This study was financially supported by the Natural Science Foundation of Guangdong Province (2022A1515011562), Guangdong Provincial Special Fund for promoting high-quality economic development (GDNRC [2021]56, Yuerong Office Letter [2020]161), the Program for Scientific Research Start-up Funds of Guangdong Ocean University (060302072101), the Comparative Study and Optimization of Horizontal Lifting of Subsea Pipeline (2021E05011), and the China Scholarship Council (CSC202306320084).

语种：英文

外文关键词：beam trawl system; dynamic characteristics; fracture failure; towing process

外文摘要：Deep-sea fisheries depend on various fishing methods, including trawling, purse seining, and longline fishing, among others. Studying the dynamic characteristics of trawling operations is essential for the trawl mechanism. Because of the solid truss support, the beam trawl system may be employed in extreme sea conditions, the high-speed driving of tugs, and maneuvering situations. This study systematically investigates the dynamic responses and structural safety of a midwater beam trawl during towing via the lumped mass method and OrcaFlex 9.7e simulations. Firstly, a trawl model with four towlines was developed and validated against flume tank experiments. Secondly, multiple operational scenarios were analyzed: towing speeds, angular velocity variations under a fixed turning radius, and radius effects under constant angular velocity. The results show that line tension increases with the speed increment and that the rigid frame destabilizes at angular velocities exceeding 20 degrees/s due to centrifugal overload. Furthermore, line fracture scenarios during startup and straight-line towing were emphasized. Single-line failure leads to edge constraint loss, redistributing stress to the remaining lines, and asymmetric dual-line fracture triggers net torsion, reducing fishing efficiency. This study provides theoretical guidance for optimizing the safe operational parameters of midwater beam trawls.