基于流固耦合的尼龙网流场特性及变形分析
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作者单位:

1.哈尔滨工程大学水下机器人技术重点实验室;2.哈尔滨工程大学烟台研究院

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S967.3

基金项目:

国家自然科学(51909040);水下机器人技术重点实验室稳定支持课题(JCKYS2022SXJQR-11);山东省重点研发计划项目(2020CXGC010702)


Flow field characteristics and deformation analysis of nylon net based on fluid-structure coupling
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Affiliation:

1.Key Laboratory of Science and Technology for National Defence,Harbin Enginering University;2.Harbin Enginering University YanTai Research Institite

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    摘要:

    无结尼龙网作为一种经济且水动力优良的网衣材质在海洋养殖网箱渔网方面得到普遍使用。考虑网衣的工作条件,特别是在水流作用下,网衣的变形特性和周围流场变化是关键。基于剪应力SST K-ω湍流模型,并结合ANSYS Workbench的单向流固耦合方法,将网衣所受压力值作为输入载荷施加在平面网表面,研究了在不同流速、不同网衣密实度及攻角情况下平面尼龙无结网衣的流场特性,对大变形非线性网衣结构的有限元模型进行了分析。研究结果表明了基于FSI的单向耦合的数值模拟用于平面网衣变形及流场特性分析的可行性,不同攻角下通过网的流速降低差异明显,得到网的水动力系数在不同流速、密实度和攻角下的变化情况,以及平面网的等效应力分布特点和变形随攻角变化的特性。

    Abstract:

    As a kind of economical and hydrodynamic net material, the knotless nylon net is widely used in Marine aquaculture cage fishing nets. Considering the working conditions of the net, especially under the action of water flow, the deformation characteristics of the net and the changes in the surrounding flow field are key. Based on the shear stress SST K-ω turbulence model and combined with combined with the one-way fluid-structure coupling method of ANSYS Workbench, the pressure value of the net is applied as an input load on the surface of the net plane. The flow field characteristics of the planar nylon knotless net under different flow rates, different solidity and angles of attack are studied,and the finite element model of large-deformation nonlinear net structure is analyzed. The results show that the one-way coupling numerical simulation based on FSI is feasible for the analysis of net plane deformation and flow field characteristics. At different angles of attack, the flow rate reduction through the net is different. The hydrodynamic coefficient of the net is obtained under different flow rate, solidity and angles of attack. The characteristics of equivalent stress distribution and deformation variation with the angles of attack are also be represented.

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  • 收稿日期:2022-09-30
  • 最后修改日期:2022-11-07
  • 录用日期:2022-11-10
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