理想状态下弹丸身管耦合系统动力响应特性研究

The Study on the Characters of the Dynamic Response of the Coupled System of Projectile Moving in the Barrel Under Ideal State

为了研究弹丸身管耦合系统动力响应特性,采用数值方法对弹丸身管耦合系统进行了计算,得到了弹丸身管耦合系统动力响应的数值解。根据数值计算结果,对弹丸身管耦合系统动力响应特性进行了研究,得到了弹丸膛内运动、身管扭转动力响应和横向动力响应的基本规律,揭示了弹丸身管耦合系统动力响应机理。研究结果表明:身管扭转与弯曲振动相互耦合,以波动形式传播,当弹丸运动到渐速膛线与等齐膛线交点时,身管产生显著的扭转变形;身管横向动力响应特征为波动响应;当弹丸出炮口时,最大波动幅值位于炮口处;半约束期内,身管炮口横向动力响应产生显著变化,主要表现为加速度波动频率和幅值增加。

To study the characters of the dynamic response of projectile moving in gun tube, the numerical solution of od. According motion theory. the coupled system composed of projectile and th to the numerical results, the characters of the d The general regularity of the projectile motion e gun tube is obtained by numerical methynamic response is studied with the wave and the dynamic mechanism of the barrel were revealed. The results show that the torsion and the transversal dynamic response were coupled and the main character of the transversal dynamic response is flexural wave propagation and reflected in the gun tube. The notable distortion will be generated as the projectile moved to the point of intersection of the uniform twist rifling and the increase twist rifling. The maximum of the transversal displacement oc cur at the muzzle as the proiectile moved to the muzzle. The dynamic transversal response of the muzzle will be changed obviously and the its main character is frequency and amplitude of the acceleration curve increased during semi-constraint period.