中文摘要：

爆炸压实过程中多孔体的孔隙闭合程度对压实效果起着决定性作用。利用LS-DYNA有限元程序，对无氧铜中的圆形孔隙塌缩过程进行了数值模拟。根据模拟结果分析得出，在6GPa的冲击压力下．孔隙闭合时不同边界区域会发生爆炸焊接和射流侵彻，这2种结合机理可以使材料结合更牢固，提高材料的致密度和机械强度，实现高质量的爆炸压实。

英文摘要：

To explore the compaction mechanism of porous materials under explosive loading, the process of the circular shape pore collapse in oxygen-free copper was numerically simulated by using the LS-DYNA finite element code. Simulated results indicate that explosive welding and jet penetration can appear in the different boundary regions during pore collapse under the shock pressure of 6 GPa. These two bonding modes can improve the bonding compactness of the boundary material and enhance the density and mechanical strength of the block materials obtained by explosive compaction possess.