摘要
渔网的动力分析是养殖网箱设计和优化的基础。通过把一系列杆相互铰接在一起,建立网的模型,模拟网在来流作用下的变形。作用在杆上的水动力可以通过Morison公式来计算,采用有限单元的离散方法,并利用网目合并的方法来减少总的自由度数目。模型的计算结果同试验成果做了对比,计算与试验在柔性网的变形方面,结果吻合良好。
The study of the dynamic behavior of net cages in current is needed to improve design, performance and reliability of such structures. The behavior of fish nets exposed to current is investigated with a numerical model. The net is modelled by a set of truss elements, and the hydrodynamic forces are calculated using Morison equation. The finite element scheme is used for time and space discretizafion. Mesh grouping method is used to reduce the number of freedoms. The numerical results from the model are compared with those of several experiments performed by foreign investigators. The first case is netting behavior in the air. The second case is the deformation of the fishing net fixed to steel rods in steady flow. The third case is the deformation of the netting cylinder in uniform flow. The emphasis is focused on the deformation of the flexible net structure. It is shown that there is a close agreement between each other.
出处
《海洋工程》
CSCD
北大核心
2007年第1期93-100,共8页
The Ocean Engineering
基金
国家自然科学基金资助项目(10272118)
教育部高等学校博士学科点专项科研基金资助项目(20020558013)
关键词
柔弹性结构
水动力
渔网
流固耦合
flexible structure
hydrodynamics
fishing net
fluid-structure interaction
