惯性起爆弹丸内装药摩擦起爆特性

为了对惯性起爆弹丸的起爆特性进行定量分析,对弹丸的撞击起爆过程进行了试验研究。根据炸药的热起爆理论,建立了装药的摩擦起爆模型; 结合LS-DYNA软件对装药的惯性撞击特性进行分析,得到了不同工况下装药的摩擦温升曲线。结果表明:在弹丸能够有效穿透靶板的情况下,弹丸的着靶速度越低,装药所受的惯性冲量越大,装药越容易被起爆。计算得到的钝化RDX与钢惯性体之间的滑动摩擦系数为0.04。将数值计算与试验测量的结果进行了对比分析,验证了摩擦起爆模型的有效性。

Study on Friction Initiation Characteristics of Inertial Initiation Projectiles

To quantitatively analyze the initiation characteristics of inertial initiation projectile,experimental study on the impact initiation process of projectile was carried out. According to the thermal explosion theory of explosive,the frictional initiation model of charge was established. The inertial impact characteristic of the charge was analyzed by combining with LS-DYNA software. The frictional temperature-rise curves of the charge under different operating conditions were obtained. Under the condition of projectile effectively penetrating the target,the slower the projectile impacts the target,the larger the inertial impulse on the charge,and the easier the charge is to be detonated. The sliding friction coefficient between the passivated RDX and the steel inertia body is 0.04. The numerical results were compared with the experimental results,which verified the correctness of friction initiation model.