潜射导弹出水姿态影响因素研究OA北大核心CSTPCD

In order to achieve fast and accurate calculation of the exiting-water altitude of submarine launched missile,a model of ocean flow field and an exiting-water dynamics model of submarine launched missile were established in this paper.Based on which,the effect of cavitation phenomenon on the hydrodynamic characteristics of the missile was analyzed.The effects of missile velocity,ocean current velocity,wave height,and exiting-water phase on the missile exiting-water attitude were studied.The research results indicate that,the cavitation effect has a relatively minor impact on the missile attitude when the speed is less than 20 m/s during the exiting-water process.The action time of the wave forces on the missile is related to the launch velocity.The lower the missile velocity is,the more perturbation of the missile altitude is.The higher the ocean current velocity is,the more severe the disturbance to the missile attitude and the lateral deviation are.The wave height affects the amplitude of wave force and has a direct impact on the parameters of water outlet attitude.The larger the wave height,the greater the impact on the parameters of water outlet attitude.The initial phase and flow velocity of the outflow mainly affect the direction of motion of fluid particles,changing the additional inertial force of waves.The missile's outflow at the trough and peak positions has the greatest impact on the missile's attitude,and the wave node is between the two.