摘要
随着水产养殖从近海至深远海的发展,具有抵抗恶劣海况能力的新型半潜式养殖网箱被相继设计和制造,研究其水动力性能具有重要的工程意义。基于势流理论和莫里森模型,结合三维面元法和有限元法建立半潜式养殖网箱主体框架-网衣-系泊系统全耦合数值模型,在验证数值模拟的可靠性后,分析规则波下网箱的水动力响应与结构应力响应,重点关注网箱各部分的相对运动。结果表明,网箱的运动由慢漂运动和波频运动两部分组成,其中慢漂运动会造成平衡位置的偏置;在波浪传播方向上,框架中同一高度处的节点几乎不发生相对运动,而不同高度处的节点由于竖向梁的旋转和弯曲而存在相对错位;侧向网衣中心区域存在较大的结构变形,从而导致了柔性网衣与主体框架存在较大的相对运动。此外,还分析了波浪参数和网衣密实度对网箱运动的影响。研究成果可为半潜式养殖网箱数值模拟方法提供一定参考。
With the development of aquaculture from near shore to offshore regions,new semi-submersible aquaculture cages with the ability to resist harsh sea conditions have been designed and manufactured successively,and it is of great engineering significance to study their hydrodynamic performance.Based on potential flow theory and Morison model,combining the 3D panel method and finite element method,the main frame-net-mooring fully coupled numerical model of a semi-submersible aquaculture cage has been established,and after validating the reliability of the numerical simulation,the hydrodynamic response and structural stress response of the cage under regular waves are analyzed,focusing on the relative motion of each part of the cage.The results show that the motion of the cage is composed of two parts:slow drft motion and wave frequency motion,and the slow drift motion will cause the offset of the equilibrium position.In the direction of wave propagation,the nodes at the same height in the frame hardly have relative motion,while the nodes at different heights have relative dislocation due to the rotating displacement and the bending deformation of the vertical beams.There is a large structural deformation in the center area of the side net,which leads to a large relative motion between the flexible net and the main frame.In addition,the influence of wave parameters and net solidities on the motion of the cage was analyzed.The research results can provide some certain references for the numerical simulation method for the semi-submersible cage.
作者
毕鑫嗣
张显涛
朱云龙
周春华
张雪燕
王瀚彬
BI Xinsi;ZHANG Xiantao;ZHU Yunlong;ZHOU Chunhua;ZHANG Xueyan;WANG Hanbin(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;SJTU Yazhou Bay Institute of Deepsea Sci-Tech,Sanya 572000,Hainan,China;Chongqing Research Institute,Shanghai Jiao Tong University,Chongqing 401135,China;Shanghai Zhenhua Heavy Industries Co.,Ltd.,Shanghai 200125,China)
出处
《船舶工程》
CSCD
北大核心
2024年第5期6-16,67,共12页
Ship Engineering
基金
国家自然科学基金(42206227)
重庆市自然科学基金(CSTB2023NSCQ-MSX0432)
上海交通大学深蓝计划项目(SL2022PT103)
海南省科技计划三亚崖州湾科技城自然科学基金联合项目(2021JJLH0062)。
关键词
半潜式网箱
全耦合数值模型
水动力响应
结构响应
相对运动
semi-submersible cage
fully coupled numerical model
hydrodynamic response
structural response,relative motion
