波浪作用下鲆鲽类方形网箱水动力特性数值模拟.docVIP

 波浪作用下鲆鲽类方形网箱水动力特性数 值模拟# 赵云鹏1，陈小芳1，许条建1，关长涛2，崔勇2* 5 10 15 20 25 30 35 40 45 （1. 大连理工大学，港口海岸和近海工程国家重点实验室，辽宁 大连 116024； 2. 中国水产科学研究院，黄海水产研究所，山东 青岛 266071） 摘要：鲆鲽鱼类在北方沿海地区形成了大规模的工厂化养殖,已成为我国海水养殖的重要品 种之一。鲆鲽类网箱水动力特性研究是保证鲆鲽鱼类海上深水网箱养殖安全性的前提和保 障。本文主要针对鲆鲽类方形重力式网箱在纯波浪条件下的水动力特性进行研究。文中采用 数值模拟的方法对鲆鲽类方形深水重力式网箱主要部件浮架系统、配重系统、锚碇系统进行 了模拟。将模拟结果与实验结果进行分析比较表明数值模拟的方法能较好地模拟鲆鲽类方形 深水重力式网箱的水动力特性。在此基础上，进一步研究了底框重量和网衣高度的改变对网 箱各量的影响，模拟结果显示：增大底框重量，会增加锚绳受力，但有助于减少底框运动倾 角；增加网衣高度，锚绳受力加大，网衣对浮架和底框的牵制作用加大，从而浮架和底框的 运动幅度有所减小。最后，本文在以上研究结果的基础上，为鲆鲽类网箱的设计与优化提供 了参考建议。 关键词：重力式网箱；物理模型试验；水动力特性；数值模拟 中图分类号：Q959.468 The simulation of the hydrodynamic properties of gravity cage for flatfish culture in waves ZHAO Yunpeng1, CHEN Xiaofang1, XU Tiaojian1, GUAN Changtao2, CUI Yong2 (1. State Key Lab of Coastal and Offshore Engineering, Dalian University of Technology, LiaoNing DaLian 116024; 2. Yellow Sea Fisheries Research Institute, ShanDong QingDao 266071) Abstract: At present, flatfish has become a very important mariculture species in China, and an industry of mariculture has developed in the north coastal regions. Growing fish offshore in exposed waters brings a challenge to the industry. Therefore, much more attentions should be paid for the hydrodynamic research of the net cage for flatfish culture in order to maintain the facility safety. An investigation is carried out to analyze the hydrodynamic properties of gravity cage for flatfish culture exposed to waves. A numerical model is built to simulate the hydrodynamic behavior of the float collar, the sinker system and the mooring system, which are the main parts to withstand the waved-induced forces acting on the net cage structure. In order to validate the numerical model, a series of experiments are conducted, and the comparisons between experimental and numerical results are made. The results show that the numerical model can be used to predict the primary hydrodynamic behavior of gravity cage in waves, and the mean relative error is less than 9%. After va