A static analysis of the tension and configuration of submerged plane nets
A static analysis of the tension and configuration of submerged plane nets
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DOI：
10.1046/j.1444-2906.2002.00497.x
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发表时间：
2002-08
影响因子：
1.9
通讯作者：
R. Wan;F. Hu;T. Tokai
中科院分区：
文献类型：
--
作者：
R. Wan;F. Hu;T. Tokai
本文用非线性有限元法计算了均匀流中网组的平衡构形和张力分布。该方法将网中的每个网格杆件建模为无限柔性的绳单元，在每个端部通过无摩擦铰链连接到其他单元。采用牛顿-拉夫逊法求解关于网杆张力和结点位移的基本非线性方程组。从初始估计状态到正确解的全局收敛是使用除了常见配置迭代过程之外的加载迭代来确保的，以便准确地对水动力的形状相关特性进行建模。该方法被证明是预测的形状和张力分布的渔网在本研究中检查的情况下，具有合理的精度。
A non-linear finite element method is employed to determine the equilibrium configuration and tension distribution of a net set in a uniform current. The method models each mesh bar in the net as an infinitely flexible rope element connected at each end to other elements by a frictionless hinge. The Newton-Raphson method is used to solve the basic non-linear simultaneous equations with respect to tension in mesh bar and knot displacements. Global convergence to the correct solution from an initially estimated state is ensured using a loading iteration in addition to the common configuration iterative procedure in order to accurately model the shape-dependent characteristic of hydrodynamic forces. The method is shown to predict the shape and tension distribution of fishing nets with reasonable accuracy in the case examined in the present study.