The High-Speed Mobile Water Entry And The Mobile Parameter Optimization Design

The subject of this paper comes from science and technology department of Heilongjiang province supporting project—"underwater high-speed mobile foundation theory and correlative technique research", and this paper is one of important part of the research. It is an extremely complex question of the high-speed mobile entering water and the parameter of the mobile optimized design. Regardless of the fundamental research or the project application all involves other many disciplines, such as, physics, hydrodynamics, material mechanics, and so on. It is precisely computed that the mobile enters water trajectory and enters water load. It is very important of the underwater high speed mobile of reducing resistance of mechanism and supercavitation research and the parameter of the mobile optimized design, and so on. These are extremely vital significance to study the high speed mobile entering water and the parameter of the mobile optimized design.The first chapter, in last century 90's, take Russia developing "the storm" torpedo as opening words, and start studying this chapter content . Simply introduce this torpedo principle of work and the supercavitation shaping mechanism. Lastly, introduce the background of entering water research background, the research of history and the other countries obtaining achievement.The second chapter, it is defined that we will use the variable and it is introduced that we will use the related theorem. Then infer the spatial system of equations of the mobile entering water, including dynamics system of equations, the kinematics system of equations and in the peculiar circumstance, equations of the mobile vertical entering water. The third chapter, when the mobile enters water process, it will appear "the mobile, the gas, the water" the mutual function phenomenon. Take it as opening words, and start studying this chapter content. It is the load analysis of hitting the water stage. Lastly, we concrete analyze the computation axial symmetry mobile entering water and the inclined posture entering water impact, and has given the concrete example analysis by MATLAB.The fourth chapter, in the first part, sketchily introduce the stability of the mobile entering water, and provide the stable aspect picture of the mobile entering water process. In the second part, by the antisubmarine aircraft airdrop torpedo to hit goal, and expands the mobile to fall in the water the precision evaluation analysis, and proposes one theory method of the precision evaluation.The fifth chapter, hypothesis the mobile some parameters being known, infer the formula of the best cavity length, the best cavitations number, the best cavitator radius and the best moving distance.