深远海新型潜浮式网箱水动力特性研究

深远海是全球海上粮仓竞争的战略要地，是我国水产养殖主要的空间拓展方向。本项目针对我国开放海域浪高流急的重大环境挑战，提出新型网箱设计方案。该网箱通过下潜抵抗恶劣海况下的大浪袭击，通过网箱自身的消波减流装置抵抗强流冲击，通过金属-聚乙烯组合型网衣应对生物附着，以期解决开放海域养殖面临的如何保障养殖设施安全、如何保护养殖对象安全、如何减少生物附着等难题。针对该新型潜浮式网箱，本项目利用理论分析、物理模型试验和数值模拟相结合的方法，系统地研究波流荷载以及网箱结构参数对其波流衰减性、运动稳定性、锚泊安全性和体积保持性的影响规律，揭示新型网箱和波流之间的水动力作用机制，建立网箱波流衰减响应、运动响应、受力响应以及体积响应的计算和预测方法，构建深远海新型潜浮式网箱优化设计理论。研究成果可以为深远海养殖装备提供新的技术方案，并丰富深远海网箱装备水动力学知识体系，具有明显的产业应用价值和理论研究意义。

Developing offshore aquaculture is the inevitable choice to expand aquaculture space and update aquaculture method. In addition, it has become worldwide competitive to improve the ability of conducting aquaculture practices in open sea condition to meet with the great demand for increasing seafood protein. To this end, a novel submergible net cage featured with fairly good performance in withstanding harsh sea condition and organism antifouling has been proposed in this project to guarantee the safety of the net cage, the safety of the farmed fishes and to lessen the replacement and cleaning of the net chamber. Integrated methods of theoretical analysis, experimental study and numerical simulation have been adopted to investigate the effect of environmental loading and net cage configuration on wave attenuation, motion response, mooring response and effective volume so as to figure out the corresponding hydrodynamic mechanisms and optimize the method for calculating and predicting the hydrodynamic characteristics of the novel submergible offshore net cage. This research not only can enrich the hydrodynamic theory of aquaculture engineering, but also provide theoretical guidance and valuable reference in net cage development, showing great potential in engineering application and theoretical research.