文章摘要
周澍欣,胡庆松.鲤鱼三维建模及流场受力数值计算[J].上海海洋大学学报,2013,22(6):855-861
鲤鱼三维建模及流场受力数值计算
Carp 3D-modeling and stress calculation in flow field
投稿时间:2013-06-08  修订日期:2013-09-10
DOI:
中文关键词: 鲤鱼  鱼鳍  三维建模  流场  有限元
英文关键词: carp  fins  3D-modeling  flow field  finite element method
基金项目:上海市自然科学基金(11ZR1415600);上海市教育委员会创新基金(12YZ133);国家自然科学基金青年基金(51309150)
作者单位
周澍欣 上海海洋大学 工程学院 
胡庆松 上海海洋大学 工程学院 
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中文摘要:
      将鱼体和鱼鳍整体作为研究对象进行流场中受力分析对于研究鱼类本身高游动效率机理和仿生应用具有重要意义。以鲤鱼为研究对象,通过对鱼体的形体模型数学化,将特征数据导入FLUENT三维软件,结合鲤鱼的运动与形体特征进行建模,并将其模型置于来流方向平行于鱼体的流场中进行力学有限元数值计算。计算中物理场采用中心差分插值方法,流动模型采用标准两方程模型,结合具体参数进行了推导计算。通过计算发现X方向上所受阻力贡献度排名前三分别为鱼头部分的45%、鱼主体部分的29%以及鱼胸鳍部分的14%;鱼体部分在Y方向上所受升力贡献度排名前三分别为鱼胸鳍部分的47%、鱼主体部分的29%以及头部的14%;总合力为(-7.88×10-3, 2.00×10-3,-5.87×10-5)N。计算结果表明在设计中考虑升力时应主要着重于鱼的前鳍以及鱼体部分的设计,考虑运行阻力时应着重于鱼头以及鱼体部分的设计。数值计算结果为仿生机器鱼的结构设计提供了一个良好的力学基础,对于提高仿生机器鱼的运动控制水平具有较好的指导价值。
英文摘要:
      It is critical to take the fish body and fins as an integrated object to analyze the stress in the flow field which will be beneficial to conduct the research of its highly efficient swimming mechanism and bionic application. Taking carp as research objective, by the mathematical description of its body and importing the data to Fluent software to set up the model, the mechanics of the fish stressed by the flow field is conducted by the finite element method. Physical field in the calculation adopts the central difference interpolation method. Flow equation chooses standard k-ε model, then integrated with the detail parameters, the calculation is conducted. The results of the simulation indicated that the top three parts of resistance devoted in the direction of the negative x axis is the 45% of head part,29% of the fish body and 14% of pectoral fins; and also top three parts of resistance devoted in the direction of the positive y axis is the 47% of pectoral fins,29% of fish body and 14% of head part. Total force vector is (-7.88×10-3, 2.00×10-3,-5.87×10-5) N. The data above show that focus should concentrated on the fish body and pectoral fins when designing the model mainly considering the lift force. The designing of fish body and head part should be focused on when mainly consider the resistance force. The simulation result provides a sound mechanics foundation for the future research of controlling of the bionic robot fish.
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