基于人工肌肉的仿鲨鱼鳃部射流孔结构研究（英文）

Bionic structure of shark's gill jet orifice based on artificial muscle

本文基于鲨鱼鳃部射流孔的生物原型特征,结合聚合物金属复合材料(IPMC)人工肌肉材料的柔性驱动特点,使用衬套柔性连接件创建了IPMC直线驱动单元仿真模型,提出了IPMC材料驱动的仿生鳃单元的射流孔形状动态控制结构。同时,通过对所设计仿生鳃板的受力分析、仿生鳃单元开合过程的运动过程模拟、鳃板的大挠度变形及其对射流流态的影响等的模拟分析,验证了采用IPMC材料驱动的仿鲨鱼鳃部射流模型能够使射流孔在变主流场流速条件下获得不同倾斜角、不同大小、不同形状的动态控制及主动控制。另外,本文通过研究仿生鳃板在动压力作用下的大挠度变形问题,并与刚性鳃板条件下射流流态参数进行对比,获得了IPMC位移控制量真实值到理论值的近似修正量。

Based on the biological prototype characteristics of shark’s gill jet orifice,the flexible driving characteristics of ionic exchange polymer metal composites(IPMC)artificial muscle materials and the use of sleeve flexible connector,the IPMC linear driving unit simulation model is built and the IPMC material-driving dynamic control structure of bionic gill unit is developed.Meanwhile,through the stress analysis of bionic gill plate and the motion simulation of bionic gill unit,it is verified that various dynamic control and active control of the jet orifice under the condition of different mainstream field velocities will be taken by using IPMC material-driving.Moreover,the large-deflection deformation of bionic gill plate under dynamic pressure and the comparative analysis with that of a rigid gill plate is studied,leading to the achievement of approximate revised modifier from real value to theoretical value of the displacement control of IPMC.