水流作用网衣过程的数值模拟

Numerical simulation of dynamic process of cylinder nets in current

摘要: 网衣是深水网箱的主要组成部分，也是整个网箱系统中受力最为复杂的部件之一。文章介绍了水动力作用下一种基于集中质量法的网衣数学模型，并引用前人的试验结果对数学模型进行了验证。在此基础上，利用此数学模型在不同配重（GW1=400 kg和GW2=800 kg）和流速（U=0.3~0.6 ms-1）条件下分别对网衣所受的水流力、网衣形状和网衣运动位移三者随时间的变化过程进行了数值模拟，给出了网衣达到稳定状态前、后网衣受力变形的计算结果，揭示了网衣在水流作用过程中的动态变化规律，并进一步分析了配重及流速大小对网衣受力、变形及运动特性的影响。

Abstract: Cylinder net, an important component of deep-water net cage, is the most complex loading part in a cage system. Based on lumped mass method and previous test results, the paper introduces and verifies a numerical model of cylinder net in current. Under 2 weight modes (GW1=400 kg, GW2=800 kg) and 4 current velocities (U=0.3~0.6 ms-1), we simulated the drag force, dynamic deformation and movement displacement of cylinder net along withtime by using the numerical model to reveal the dynamic variation rule of cylinder net in current, and to analyze the effects of weight and current velocity on the drag force, deformation and movement of the net.