The water - exit movement of the submarine - based powerless missile which is horizontally or vertically launched is solved . the change trend of force and moment which are put on the missile is given . the effects of ocean current and wave that affect the missile is studied based on the front work 本文建立了导弹出水运动数学模型，采用定步长四阶龙格-库塔( runge - kutta )法求解了潜载无动力导弹水平发射和垂直发射的出水运动过程；给出了导弹出水过程中所受力和力矩载荷的变化情况，并在此基础上分别研究了海流和波浪对导弹的影响。
