网渔具计算机数值模拟的研究进展  

Development of numerical computer simulation on fishing nets

作　　者：张新峰[1,2,3,4,5] 胡夫祥[6] 许柳雄[1,2,3,4,5] 陈新军[1,2,3,4,5] 朱清澄[1,2,3,4,5] 邹晓荣[1,2,3,4,5] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]国家远洋渔业工程技术中心,上海201306 [3]远洋渔业协同创新中心,上海201306 [4]农业部大洋渔业资源环境科学观测实验站,上海201306 [5]大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306 [6]东京海洋大学

出　　处：《海洋渔业》2015年第3期277-287,共11页Marine Fisheries

基　　金：国家863高技术研究发展计划(2012AA092301;2012AA092302;2012AA092303);国家科技支撑计划(2013BAD13B05)

摘　　要：对近年来网渔具的计算机数值模拟中使用的几何拓扑分解方法、数学建模思想和模型算法等进行了归纳和系统整理,并探讨了各种算法的稳定性和收敛性。分析认为:刚体有限元法数学建模的优点是模型简化,能基本反映网具粗糙形状,缺点是忽略网线张力,无法精确反映网具的受力和网具的运动状态;基于质量弹簧体系和牛顿力学的柔性有限元法是主流,数值模拟结果更符合网具的实际状况,网形更细腻逼真,计算结果与网具实测拟合较好;显式算法对时间步长较敏感,稳定性和精度不如隐式算法好。NEWTON-RAPHSON和NEWMARK-β算法具有无条件稳定性和收敛性,大部分研究采用了此算法。The paper summarized and systematized the geometric topological decomposition method,mathematical modeling and algorithm used in numerical computer simulations on fishing nets（ trawl,purse seine）. Research literature related to the use of computer technology and mathematical models to numerically simulate the behavior of fishing nets,the tension distribution and dynamic visualization were reviewed.Currently there is a considerable gap in numerical research and digital design on fishing nets between China and developed fishing courtries,this paper also discussed most of the major ideas of mathematical modeling,complex formulas and computer-implemented methods,and algorithm stability. The purpose is to introduce and study the main international numerical simulation tools and methods,to promote the domestic development of digital fishing nets.The paper introduced and summarized the numerical simulation of fishing nets in computer in five aspects： 1） advances in numerical simulation of fishing nets（ trawl,purse seine）; 2） geometric topological decomposition method of fishing nets; 3） main methods of mathematical modeling; 4） basic methods for solving model; 5） basic simulation results of fishing nets. According to relevant studies,from partial to the whole the numerical simulation of fishing nets can be divided into： numerical simulation of components（ such as netting,ropes,cod end） and the entire fishing net; in the geometric decomposition method of physicalmodels,it can be divided into rigid finite element method and flexible finite element method,lumped mass method,and mass-spring system. There are basically three categories in mathematical modeling methods：Newtonian mechanics method,the energy conservation law,and rigid finite element method; the main mathematical model solving methods were： finite difference method, NEWTON-RAPHSON method,NEWMARK-β method, RUNGE-KUTTA method, and finite element algorithm. And the stability and convergence of different algorithms were analyzed by a s

关 键 词：拖网 围网 数值模拟 集中质量法 NEWTON-RAPHSON法 NEWMARK-Β法 RUNGE-KUTTA法 

分 类 号：S972[农业科学—捕捞与储运] TP191[农业科学—水产科学]