网口部分网衣结构对帆式张网性能的影响  

EFFECT OF STRUCTURE IN NET MOUTH PART ON PERFORMANCE OF CANVAS-SPREADING STOW NET

作　　者：黄洪亮[1] 陈雪忠[1] 程家骅[1] 胡永生[2] 

机构地区：[1]中国水产科学研究院东海水产研究所,上海200090 [2]江苏省海洋渔业指挥部,南通226062

出　　处：《海洋水产研究》2000年第2期61-65,共5页Marine Fisheries Research

摘　　要：通过对帆式张网模型水池试验，研究了帆式张网网中部分网衣结构对网具性能的影响。试验表明，（1）背腹网网口网衣弧形剪裁后，背腹网网衣受力均匀程度明显改善，网具阻力平均下降3．9％，网口垂直扩张平均增加4．7％，水平扩张平均增加7.2％。（2）背腹、侧网网口网衣剪成弧形后，网具阻力平均下降24．2％，水平扩张低速时有所下降，但高速时开始增加，平均增幅为3．5％。侧网网口网衣弧形剪裁对网日垂直扩张影响不大。Research on effect of structure of the net mouth of strow net with canvas spreader on net performance was carried out and discussed in this paper, through model testing in towing tank. The test showed: 1.By curve cutting in the top and bottom parts of the net mouth, net drag decreased by 3. 9% averagely,vertical opening and horizontal spreading averagely increased by 4. 7% and 7. 2% respectively. 2. Through curve cutting in the top, bottom and side parts of the net mouth, net drag decreased by 24. 2% averagely, horizontal spreading went down slightly at low current speed but increased at higher current speed. Curve cutting in side parts of net mouth had little effect on vertical opening.

关 键 词：帆式张网 背腹网 侧网 弧形剪裁 网具性能 网衣 

分 类 号：S972.12[农业科学—捕捞与储运]