仿生波动鳍推进器设计及运动学仿真分析  

Design of a Biomimetic Undulating Fin Driven Propulsor and Numerical Analysis on Its Motion

作　　者：何建慧[1] 章永华[1] HE Jianhui ZHANG Yonghua(School of Mechatronic Engineering,Taizhou Vocational and Technical College,Taizhou, Zhejiang 318000)

机构地区：[1]台州职业技术学院机电工程学院,浙江台州318000

出　　处：《系统仿真技术》2016年第3期173-178,共6页System Simulation Technology

基　　金：浙江省自然科学基金项目(LY15E060001);台州职业技术学院校级一般课题(2016YB01)

摘　　要：以鳐鱼为仿生对象,基于两侧胸鳍的生物学研究成果,对鳐鱼的胸鳍进行形态和结构上的仿生设计。建立仿生鳍波动的二维数学模型。基于计算流体动力学(CFD:Computational Fluid Dynamics)技术,采用非耦合隐式求解非定常不可压缩N-S方程和连续性方程,利用三角形非结构网格对计算区域进行离散,比较分析了不同运动学参数下仿生鳍无量纲阻力系数随时间的变化规律。从仿真结果知:仿生鳍推进力随着波动频率的增加、波幅的增加以及波长的增长而近似线性增大,而游动稳定性则与之相反。该仿真结果为深入了解仿生波动鳍的推进机理提供更为详细的依据,也为仿生波动鳍的优化设计提供参考。On the basis of biological research achievement of stingray pectoral fins, we carded out bionic design from the inspiration of its morphology and structure characteristics. A two-dimensional mathematic model for the undulating motion was established. Based on the CFD （Computational Fluid Dynamics） technology, the unsteady incompressible navier-stokes equation and continuity equation was solved using uncoupled implicit method. The calculation area was discreted using triangular unstructured grid. The change of non-dimensional drag coefficient with time was presented under the different kinematic parameters. The simulation results indicate that the propulsion force was increased linearly with the increase of undulating frequency, amplitude and wavelength. However, the propulsion stability was decreased with them. The simulation results provide valuable details for further understanding of propulsion principle of biomimetic undulating fin as well as for its optimal design.

关 键 词：仿生学 波动鳍 运动学 仿真 计算流体动力学 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]