金枪鱼延绳钓单丝和绳索的惯性力系数和阻力系数研究  

Inertia force coefficient and resistance coefficient ofmonofilament and rope in tuna longline gear

作　　者：宋利明[1,2] 张锦辉 李玉伟 王顺[1] 王文鑫 张波 SONG Liming;ZHANG Jinhui;LI Yuwei;WANG Shun;WANG Wenxin;ZHANG Bo(College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋生物资源与管理学院,上海201306 [2]国家远洋渔业工程技术研究中心,上海201306

出　　处：《渔业现代化》2024年第3期70-78,共9页Fishery Modernization

基　　金：国家自然科学基金项目(32273185);国家重点研发项目(2023YFD2401301)。

摘　　要：金枪鱼延绳钓单丝和绳索的惯性力系数C_(M)和阻力系数C_(D)取值直接影响到渔具数值模拟的计算速度和精度。通过波浪水槽试验探究了7种金枪鱼延绳钓单丝和绳索材料在规则波条件下所受的波浪力,并在Morison方程的基础上,使用最小二乘法计算出相应材料的C_(M)和C_(D);分析了C_(M)和C_(D)随KC数和雷诺数Re的变化情况。结果显示:同一波高下,试验材料所受波浪力随着波浪周期增加逐渐增加;同一波浪周期下,试验材料所受波浪力随波高增加逐渐增加;相同材料随着直径增加,所受波浪力增加;3种尼龙单丝随着KC数增加C_(D)逐渐增加,C_(M)变化不明显,趋于常数,随着雷诺数Re的增加C_(M)和C_(D)有逐渐增加的趋势;3种聚丙烯绳索C_(M)随着KC数和雷诺数Re增加而增加,C_(D)在低KC数时较为平稳,其随着雷诺数Re增加逐渐下降,趋于常数;涂沥青的聚丙烯绳索的C_(M)和C_(D)较为稳定。研究表明,本试验得出的C_(D)和C_(M),可用于延绳钓渔具数值模拟。Inertia force coefficient C_(M) and resistance coefficient C_(D) of monofilament and rope used in tuna longline gear directly affect the computational speed and accuracy of numerical simulations of fishing gear.In this study,wave forces acting on seven types of monofilament and rope materials for tuna longline gear under regular wave conditions were investigated through wave tank experiments.C_(M) and C_(D) for respective materials were calculated using the Morison equation and employing the least squares method.The variations of C_(M) and C_(D) with Keulegan-Carpenter number KC and Reynolds number Re were analyzed.The results indicate that:(1)Under the same wave height,the wave forces acting on experimental materials gradually increase with increasing wave period.(2)Under the same wave period,the wave forces acting on experimental materials gradually increase with increasing wave height.(3)With increasing diameter,the wave forces acting on experimental materials also increase.(4)For three types of nylon monofilament,C_(D) gradually increases with the increasing KC while C_(M) remains relatively stable,and C_(M) and C_(D) exhibit an increasing trend with the increasing of Re.(5)For three types of polypropylene ropes,C_(M) increases with the increasing KC and Re,while C_(D) stabilizes at lower KC numbers and decreases gradually with the increasing Re.(6)Polypropylene ropes coated with asphalt exhibit relatively stable C_(M) and C_(D) values.The obtained C_(D) and C_(M) values from this experiment can be applied to the numerical simulations of longline fishing gear.

关 键 词：延绳钓 单丝 绳索 惯性力系数 阻力系数 规则波 

分 类 号：S972.3[农业科学—捕捞与储运]