The Trajectory Numerical Simulation Of Underwater High-speed Vehicle

Various relevant cavity theories was summarized and analyzed in this paper. Simulation program of underwater high-speed vehicle was compiled by fortran language. This program was applied to predict under water high-speed vehicle relying on inertia or constant thrust trajectory. So under water high-speed vehicle experiment was assisted well by it. And the foundation of three-dimensional trajectory simulation and steering trajectory simulation was constructed by it too. In this paper, it contains the following content: plane movement equation of high-speed body under water was given; force analysis of the model was provided according to the model force trait; geometric parameter and dynamics parameter of the model was calculated; the solution of the plane differential equation group of the model was given by Runge - Kutta method .the routine,velocity,cavity shape and the similar parameter of each stage of high-speed body under water was calculated.Trajectory and related parameters in different initial interference are given by this program. Through it the effect of initial interference are present. Thus the harmful interference in the experiment can be avoided, the benefit interference in the experiment can be increased. The idea of simulation of six degree is present in the paper, and similarities and differences between simulation of six degree and simulation of three degree, all of them is for one purpose to make foundation for the deeper simulation of trajectory in the future.