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基于CFD模拟的单点系泊船型网箱浮架结构分析与设计
陈俊池1, 刘祚时1, 陈俊华2
1.江西理工大学;2.浙江大学宁波理工学院
摘要:
单点系泊(SPM)网箱系统由于其能随着潮流改变方向而在锚点周围移动的特性受到很多关注。这种可移动性可极大减小网箱底部的养殖残渣堆积并降低锚固安装成本。然而,由于SPM网箱系泊力大于传统的圆形网箱,离岸环境承受风浪时SPM网箱系统的风险极高。针对这一问题,研究设计了一种相较传统圆形网箱拥有更小系泊力的船型网箱,并运用正交原理制定了三因素三水平的试验方案,对网箱浮架进行了计算机数值模拟,分析网箱在波流共同作用下的水动力特性变化。研究表明,在兼顾经济成本与网箱安全性的条件下,长24m,宽9m,头部角度为60°的网箱浮架具有较优良的水动力性能和相对较低的养殖成本。该研究为单点系泊深水网箱提供了一个解决方案,可为我国深水网箱的发展提供一定的理论参考依据。
关键词:  抗风浪船型网箱  单点系泊  水动力分析  结构设计
DOI:10.11759/hykx20190715003
分类号:
基金项目:宁波市重大科技攻关项目(2015C110015)、宁波市科技计划项目(2015C50061)
Structural analysis and design of single point mooring cage floating frame based on CFD simulation
chenjunchi1, liuzuoshi1, chenjunhua2
1.Jiangxi University of Science and Technology;2.Zhejiang University Ningbo Institute of Technology
Abstract:
Single Point Mooring (SPM) cage system has attracted much attention because of its ability to move around anchor points with the current in different directions. This mobility can greatly reduce the accumulation of aquaculture residue at the bottom of the cage and reduce the installation cost of anchorage. However, because the mooring force of SPM cage is greater than that of traditional circular cage, the risk of SPM cage system is very high when under wind and wave. A ship-type of floating frame with smaller mooring force than the traditional circular cage was designed to solve this problem , along with a three-factor and three-level test scheme which was formulated based on the orthogonal principle. In order to analysis the changes of hydrodynamic characteristics of the cage under the combined action of wave and current, computer numerical simulation of the cage floating frame was carried out. The results show that the stress of the cage will?decreased initially, followed by an increase which caused by the raise of the length when the width of the floating frame is constant. The stress of the cage will continue amplify with increase of the width of the floating frame and the angle of the head. Take economic cost and cage safety into consideration, the analysis show that cage floating frame with 24m length, 9m width and 60 degree head angle has excellent hydrodynamic performance and relatively low breeding cost. Which provides a solution for the single point mooring deep-water cage. It also provides a theoretical reference for the development of deep-water cage in China.
Key words:  Anti-wave ship cage  Single-point mooring  Hydrodynamic analysis  Structural design
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