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利用LS-DYNA软件采用无网格的光滑粒子流体动力学(SPH)方法对爆炸复合的边界效应进行了二维数值模拟研究。结果表明,金属射流现象和边界效应与爆炸复合生产实践一致。爆炸复合边界效应产生原因并非是由于边界的冲击能量过剩而造成基复板碰撞时边界处的打伤打裂,在基复板碰撞之前,断裂已经产生,认为爆炸复合边界效应的产生是由于稀疏波对边界处爆轰产物的影响,导致复板边界处与内部存在速度差,从而使复板边界处的碰撞角变大,在爆轰产物压力的作用下发生断裂。此外,采用蜂窝结构炸药及双面爆炸复合方法可以使得边界效应得到有效控制。
A two-dimensional numerical simulation of the boundary effect of explosive recombination was performed by using the mesh-free smooth particle hydrodynamics (SPH) method with LS-DYNA software. The results show that the phenomenon of metal jet and the boundary effect are consistent with the practice of explosive compound production. Explosive composite boundary effect is not due to the boundary of the impact of energy surplus caused by the collision of the base plate at the border of the injury at the fracture, before the complex plate collision, the fracture has been produced that the explosive boundary effect of compound is due to sparse The influence of the wave on the detonation products at the boundary leads to the difference of velocity between the boundary of the composite plate and the inner one, so that the collision angle at the boundary of the composite plate becomes larger and the fracture occurs under the pressure of the detonation product. In addition, the use of honeycomb structure explosive and double-sided explosive composite method can make the border effect can be effectively controlled.