初始扰动下水下超高速运动体弹道数值模拟

Trajectory numerical simulation of super high-speed underwater vehicle owned initial perturbation

本文建立了铅垂平面内水下超高速运动体动力学方程,采用Logvinovich的空泡截面独立扩张原理,给出空泡截面表达式。对运动体的受力特性进行了分析,引进了较精确的滑行升力计算方法。建立了发动机推力偏心以及装配工艺误差对运动体弹道扰动的数学模型。编制了有初始扰动的弹道仿真程序,对一个模型弹进行了各种初始扰动下的仿真计算。得出了初始扰动对运动体弹道特性的影响曲线。

The dynamic equations of the super high-speed underwater vehicle in vertical plane are established and presented in this paper. Utilizing the independence principle of the cavity expansion by Logvinovich, the expression of cavity section is given. The load characteristics of the vehicle are analyzed, and the accurate calculation method of planning lift is introduced. The mathematical model of disturbance on vehicle trajectory owing to the initial of the thrust force and the error of assemblage is established. The program of trajectory simulation with initial disturbance has been compiled and the numerical simulation for a model vehicle with various initial disturbances was carried out. The curves representing the influence of initial disturbance on the vehicle trajectory characteristics have been obtained.