为研究某弹的初始扰动,以弹性接触碰撞模型模拟发射基座与地面、导弹与发射筒的单边约束关系,利用有限元方法确定接触模型的等效接触刚度,利用四阶R-K法进行系统数值仿真,重点研究了发动机推力偏心和初始瞄准对系统初始扰动的影响。结果表明,仿真结果与实验结果接近,该数学模型具有可信性,发动机推力偏心和初始瞄准角会对系统初始扰动产生很大影响。

To study the initial disturbances of a missile, a dynamic model with 14 degrees of freedom built based on the second Lagrange In this model, elastic contact model used to simulate the unilateral constraint between the launcher and the ground and the unilateral constraint between the missile and the tubehe equivalent contact stiffness determined through finite element method. The launch dynamic responses of the system simulated by using R-K method, results approximately identical with the experimental data, which indicates that the dynamic model is reasonable. Will produce great influences on the initial disturbances.