| The subject of this paper comes from the project of tackling key problem of Hei-Longjiang province science and technology "experimentation system of underwater supercavitation technology and investigation of superhigh speed mechanism". The main work in this paper includes three parts:the mechanism of the supercavitation formation and maintenance, the analysis of the stability of supercavitation, the analysis of stable reliability of the structure system of underwater high-speed mobile.Although the technology of supercavitation in our country is still in the primary state. But by referring to many native and foreign literatures, the synthesis analysis has been made for cavitation,the formation and the maintenance of the supercavitation in detail. And then the analysis for the experimentation phenomenon of our university is carried out, so the correctness of the theory in the paper is verified from the practical aspect.When analyzing the stability of the supercavitation, based on the theory of energy conservation and the equation for the gas mass balance inside cavity, a dynamic model for axisymmetric vimineous cavity is developed. After deducing strictly in mathematics, the equation for tiny pressure oscillation inside cavity is produced, consequently the solution is carried out, then the response curve of cavity oscillation and the quantitative condition of cavity stability are obtained, which may give reference for the engineering practice research.Finally, using the reliability knowledge of the stochastic structure system, the analysis of stable reliability of the underwater high-speed mobile of our university is carried out, and the correlative formulae are given. |
