Research On The Vibration Characteristic Of Supercavitation High-Speed Projectile Navigation In Different Depths

Moving in a certain speed, underwater vehicle will produce supercavitation on the surface .At the same time, its sticky area reach to the minimum and this make fluid friction of surface reach to the minimum. Theoretically, the underwater vehicle will reach to the ultra-high speed in this situation. When the vehicle move in the speed from 300m/s to 1000m/s, it will make lasting tail-slaps to keep balance. Under the impact of the continuing tail-slaps, the structure of underwater vehicle is different from the traditional vehicle. In this paper we use theoretical and simulation methods to do some research on the tail exciting force and vibration characteristics of supercavitation underwater vehicles in the tail-slaps process. Main content as follows:Based on the last research,we do the research on the vibration characteristic of Supercavitation high-speed projectile navigation in different depths. Also,we get the time variations of tail-slaps in variable depth navigation and the effect of variable depth on tail-slaps.Based on the tail slaps research, we study structural response simulation of tail-slaps vibration when supercavitation projectile move in the different depth. We get the time domain and frequency domain characteristics of projectile body parts stress and acceleration response. Using FSI simulation analysis, we do the research on the tail-slaps vibration structure response in the high-speed navigation and get depth and angular velocity effect on the tail beat movement.The results of this study can provide reference to the supercavitating vibration experiment and become the necessary basis of the work the supercavitation structure optimization design.