Wang Ning, Zhang Yu, Peng Linghui, Zhao Wenchuan
College of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China.
Biomimetics (Basel). 2025 Jan 16;10(1):59. doi: 10.3390/biomimetics10010059.
Using bidirectional fluid-structure interaction technology, the dorsal-ventral motion of the dolphin tail fin was simulated, and the feasibility of the numerical simulation method was validated through underwater motion experiments. This study investigated the effects of structural parameters and motion modes of bionic dolphin tail fins on their propulsion performance. The results show that flexible tail fins can enhance propulsion performance. Compared to equal-thickness flexible tail fins, variable-thickness flexible tail fins that conform to the structural characteristics of real dolphin tail fins exhibit better propulsion performance. Asymmetric motion modes have a certain thrust-enhancing effect, but altering the frequency ratio F and amplitude ratio H of heaving motion leads to an increase in pitching moment, reducing swimming stability. Additionally, the greater the difference in frequency and amplitude between the up-and-down motions, the larger the pitching moment. The study results provide references for the optimized design and motion control of bionic tail fins.
利用双向流固耦合技术，模拟了海豚尾鳍的背腹运动，并通过水下运动实验验证了数值模拟方法的可行性。本研究探讨了仿生海豚尾鳍的结构参数和运动模式对其推进性能的影响。结果表明，柔性尾鳍可以提高推进性能。与等厚度柔性尾鳍相比，符合真实海豚尾鳍结构特征的变厚度柔性尾鳍具有更好的推进性能。非对称运动模式具有一定的推力增强效果，但改变垂荡运动的频率比F和幅值比H会导致俯仰力矩增加，降低游泳稳定性。此外，上下运动之间的频率和幅值差异越大，俯仰力矩越大。研究结果为仿生尾鳍的优化设计和运动控制提供了参考。
