基于蒙特卡罗模拟的导弹分离边界计算方法研究

机/弹分离轨迹受到诸如弹射力、分离高度、分离速度等因素的影响,如果要同时考虑这些因素的影响,无论是对CTS实验还是CFD计算都是一个庞大的任务,但这些因素又不得不考虑,否则难以确定导弹的分离边界。这些对分离轨迹产生影响的干扰量,在本文中采用蒙特卡罗方法进行模拟。本文首先用类似网格测力的方法建立气动力数据库,然后采用刚体六自由度运动方程进行轨迹计算,考虑各因素的干扰量,最终获得分离边界。

Application of Monte Carlo simulation for the boundary of separation trajectories of a missile

Separation trajectories of a missile are influenced by many factors including eject force,separation altitude and separation velocity etc.It is a challenge for CTS experiments or CFD computation if all influence factors are considered.However,a missile’s separation boundary can’t be achieved if the factors are ignored.In this paper Monte Carlo method is introduced to simulate the errors of the factors.Grid survey approach is employed to establish aerodynamic force database.Then 6DOF equations are solved to obtain the missile’s every separation trajectory while the missile’s separation boundary is obtained finally when all errors are considered.