Numerical Optimization of Thrust Efficiency of Propulsion in Fluid using a Fin with Variable Stiffness
Numerical Optimization of Thrust Efficiency of Propulsion in Fluid using a Fin with Variable Stiffness
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DOI：
10.5226/jabmech.5.1
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发表时间：
2016
影响因子：
4
通讯作者：
Masataka Nakabayshi;Yusuke Yamaguchi;Wataru Yamazaki
中科院分区：
文献类型：
--
作者：
Masataka Nakabayshi;Yusuke Yamaguchi;Wataru Yamazaki
- 水下推进使用的柔性弹性鳍，模仿鱼的运动进行了研究。由于弹性程度对推力效率很重要，因此对一个具有动态变有效长度弹簧作为变刚度机构的鳍进行了实验分析。采用流固耦合分析方法对弹性鳍在静水中的偏航运动进行了数值模拟。弹簧的有效长度与鳍片的动态刚度的杨氏模量之间存在明确的关系。此外，使用克里金曲面响应方法，推力效率被证明是更好的动态条件下。
—Underwater propulsion using a flexible elastic fin that mimics fish locomotion is investigated. Because the degree of elasticity is important for thrust efficiency, a fin with a dynamic variable-effective-length spring as a variable-stiffness mechanism is experimentally analyzed. The yawing of the elastic fin in still water is simulated using fluid–structure interaction analysis. There is a clear relationship between the effective length of the spring and Young’s modulus for the dynamic stiffness of the fin. Additionally, using the kriging surface response approach, thrust efficiency is demonstrated to be better under dynamic conditions.