In order to analyze the damage characteristics of concrete structures subjected to penetration and explosion, the strain rate effect under impact or blast load was taken into consideration. Firstly, the damage processes and failure characteristics of concrete structures subjected to high speed guided bomb in the establishment of the penetration model were studied based on the coupling method of SPH and Lagrange. Then, damage characteristics of concrete subjected to penetration-explosion coupling effect and direct internal explosion were compared by establishing the internal explosion coupling model. The influence of penetration damage on the damage characteristics of concrete subjected to internal explosion was also analyzed. The results show that the penetration of the high-velocity projectile only causes a local damage to the concrete structure. However, the combined effects of penetration and explosion cause more significant damage to the structure. The penetration damage has important effect on the damage mechanism of concrete subjected to internal explosion.%考虑弹体侵彻、爆炸高加载率下混凝土的应变率效应,首先采用SPH-Lagrange算法建立弹体高速侵彻耦合模型,研究高速钻地制导炸弹的侵彻毁伤过程及其破坏特征;同时采用SPH算法建立考虑初始侵彻损伤的内部爆炸耦合模型,对比分析弹体侵彻与爆炸联合作用和弹体直接内部爆炸这2种条件下的混凝土毁伤特征,探讨钻地制导炸弹的初始侵彻损伤对混凝土内部爆炸毁伤破坏过程的影响.研究结果表明:高速弹体的侵彻只造成混凝土结构的局部损伤;在侵彻与爆炸联合作用下,混凝土结构将发生严重破坏.初始侵彻毁伤对混凝土内部爆炸的毁伤机理有重要影响.
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