Study on the influence of artillery recoil on the lateral stability of patrol boat

To solve the problem of lateral instability of a high-speed law enforcement patrol boat caused by the recoil of artillery fire, this paper adopts the method based on EFD (Experiment Fluid Dynamics), the dynamic stability of a high-speed patrol boat model under the impact of an external force is simulated by a percussive test. First, the model of the patrol boat is tested by dragging on the surface of still water, and then the percussive test is carried out with different centers of gravity height, different external impulses, and different speeds, the influence of the above factors on the transverse stability of patrol boat is studied. The results show that the higher the height of the center of gravity, the higher the external impulse and the lower the speed, the worse the transverse stability of the model will be. The results show that the EFD method is feasible, which is of great significance to the shape optimization design of high-speed craft and the selection of artillery systems.