南极磷虾拖网加工船双桁架系统设计

Twin-truss system design for antarctic krill trawl processing ship

[目的]为了提高南极磷虾拖网加工船的捕捞效率,避免拖网内磷虾长时间相互挤压以保护其虾体品质,[方法]提出一种相较于常规南极磷虾尾拖网捕捞效率更高的新型双支架桁杆拖网设计方案。通过系统结构建模方法,对双桁架系统在吊放和作业状态下的受力与结构进行仿真分析,得到拖网绞车与桁杆的距离,以及水平定位钢缆与桁杆距离的限制范围,从而避免双桁架结构的构件发生受力突变,确保拖网钢缆和水平定位钢缆在捕捞作业时的有效性。[结果]仿真结果显示,采用该双桁架系统能够在提高南极磷虾捕捞加工效率的同时确保系统结构的安全性。[结论]该双桁架系统可作为未来我国南极磷虾拖网加工船桁架设计的优选方案。

Aiming to improve the fishing efficiency of antarctic krill processing ships by averting the potential crushing of krill in the trawl to meet quality requirements, a twin-truss system design is proposed which has higher efficiency compared with the traditional system installed in ships. To simulate this design, an analysis of forces acting on the twin-truss structure is conducted under tethered and operating conditions using the structure model method, and an appropriate distance between trawl winch and truss structure, as well as the range for limiting the distance of the horizontal locating cable and truss structure, are obtained. It can also prevent the truss structure from breaking down, enabling the efficiency of trawling and horizontal locating cables during fishing operations. The simulation shows that the new twin-truss system design can improve the efficiency of trawl processing ships, whilst maintain the safety of the truss structure. This design can provide an optimal solution for the truss systems of national antarctic krill processing ships.