半球壳状EFP撞击起爆带壳H6炸药数值模拟和试验

Simulation and Test on Hemisphere Shell EFPs Shock to Detonation Shelled H6 Explosives

为了解半球壳状EFP对带壳H6炸药起爆特性,根据X光拍摄的EFP轮廓构建了等效数值计算模型,基于炸药冲击起爆理论,利用Lee-Trarver点火增长模型和Steinberg-Guinan强度模型模拟了半球壳状EFP撞击起爆带壳H6炸药的过程,发现弹丸穿透壳体的过程中其侧向向内收缩成水滴状,弹丸速度迅速降低,着靶面积减小。利用升-降法计算了正碰撞条件下带壳H6炸药撞击起爆临界速度和着靶面积。结果表明:质量为9. 0 g的半球壳状EFP撞击起爆带壳H6炸药的临界速度范围为2200～2300 m/s,2300 m/s撞击速度条件下,着靶面积为570 mm^2,计算和试验结果基本一致。

In order to figure out the effect of hemispherical EFPs on the detonating characteristics of shell H6 explosive,the equivalent numerical model of EFP was constructed by the X-ray. Based on the explosive shock initiation theory,the Lee-Trarver ignition growth model and the Steinberg-Guinan strength model were used to simulate the explosion process of shelled H6 explosive under the impact of shaped EFPs. In the process of penetration,the lateral shell contracts inward transforms to the shape of water droplet. The velocity of the projectile decreases rapidly and the target area is reduced. Moreover,the critical velocity and target area of the shell H6 explosive under positive impact are calculated by the rise-drop method. Affected by hemispherical shell EFP,the critical speed of the shell H6 explosive of 9. 0 g ranges from 2200 m/s to 2300 m/s. When the speed is 2300 m/s,the target area is calculated to be570 mm2,where the simulated and experimental results are basically the same.