仿生鱼身体尾鳍刚度匹配机制的数值仿真OA

Focusing on the stiffness matching mechanism between the body and caudal fin of a biomi-metic fish,a dynamic model is established.By adjusting the flexibility coefficients of the body and caudal fin to simulate stiffness variations,its influence on propulsion performance is investigated.A numerical model is constructed based on the Fluent platform,and oscillatory experiments are conduc-ted under uniform inflow conditions to systematically analyze the effects of stiffness combinations on net thrust,drag,power consumption,and propulsion efficiency.The results indicate that reducing the stiffness of the caudal fin significantly enhances net thrust but increases drag and power consumption.Conversely,reducing body stiffness decreases net thrust while improving propulsion efficiency.The stiffness of the body and caudal fin must be independently optimized and matched,with specific combinations maximizing thrust performance,achieving an improvement of 74.25%compared to the baseline.The stiffness matching between the body and caudal fin provides a reference for the swimming performance of biomimetic fish and the synergistic stiffness design of robotic fish.