浙江舟山虾拖网桁杆及叉纲的力学计算

Calculate the Tensions Acting on the Beam and Cross Ropes of the Beam Shrimp Trawl in Zhoushan Zhejiang

桁杆虾拖网作业是东海区海洋捕捞中的主要作业方式。通过模型试验和数值计算的方法,对虾拖网的主要构件桁杆、叉纲进行理论力学分析,从而求得桁杆所受的弯矩、剪力、轴力及叉纲的拉力,桁杆与虾拖网下纲相连的吊纲和上纲网片对桁杆的张力。还进一步探索了弯矩和剪力沿桁杆的分布规律,最大拖速时桁杆所受最大拉压应力情况。为今后虾拖网的使用提出建议。

Beam shrimp trawl is an main mode of operation in the East China Sea. The beam and the cross ropes of the beam shrimp trawl is analyzed with the model experiment and numerical calculation in this paper. So we can figure out the bending moment, shearing force and the axis force acting in the beam, the tensions of the cross ropes, hang ropes and the net acting on the beam. Thus explore the distribution of the bending moment and the shearing force along the beam, tension-compression under the max trawl speed. And then provide some suggestion for the use of beam at later day.