爆炸驱动球形破片飞散的数值模拟

Numerical Simulation of Scattering Characteristics of Spherical Fragment Under Blasting

利用有限元软件ANSYS/LS-DYNA,对球形破片在爆炸驱动下的飞散动态进行了数值模拟,获得了破片初速、飞散角分布及驱动过程的物理图像,模拟了多段串联式弹丸分段延时起爆后破片的空间分布特性.数值计算结果表明,利用分段延时起爆能够使后续破片较好地弥补前一层破片飞散后形成的破片"真空",并在一定时间和空间内形成破片群阵列,从而达到对目标高效毁伤的目的.

The scattering characteristic of spherical fragments under blasting was simulated by the software of ANSYS/LS-DYNA. The initial velocity, scattering angle distribution of fragments and physical process were all obtained. The distribution of fragments by adding three tandem projectiles was studied. Using time-lapse fuze to make the layers of fragments scattering one by one can make the last fragments fetch up the empty area when the first fragments are leaving, forming a fragment wall which destroys the enemy＇s air target efficiently.