钢管约束混凝土抗侵彻机理的数值模拟

摘要

Based on penetration tests,the penetration mechanism of steel tube confined concrete targets against 12.7 mm armor piercing projectile (APP)was simulated with LY-DYNA software,the finite element-smooth particle hydrodynamics method and the CSCM_CONCRETE model.The results showed that the simulation results agree well with the test data,they can better reflect the hoop cracks on side faces of the steel tube confined concrete;the confinement effect of steel tube on the confined concrete inures during the projectile expanding;the formation of the hoop cracks on side faces of the confined concrete is the inter-action results of the incident compression wave,reflected stretching wave from target back face and the confinement of the steel tube;the anti-penetration ability of the steel tube confined concrete target is higher than that of the normal concrete target without steel tube confining.%基于侵彻试验，运用 LY-DYNA 软件，有限元法和光滑粒子法相结合，采用混凝土连续帽盖模型，对12．7 mm穿甲弹侵彻小直径钢管约束混凝土厚靶机理进行了数值模拟研究。研究表明：数值模拟结果与侵彻试验吻合较好，可较好地反映钢管约束混凝土靶核心混凝土侧面环向裂纹；钢管对核心混凝土的约束作用主要发生在弹丸扩孔过程；核心混凝土侧面环向裂纹的形成是入射压缩波与靶体背面反射拉伸波及钢管约束效应共同作用的结果；钢管约束混凝土靶的抗侵彻能力优于无钢管约束混凝土靶。