钢筋混凝土靶板在弹丸冲击及爆炸载荷下响应的数值模拟

 采用HJC混凝土损伤本构模型及LS-DYNA的流固耦合算法，分别对钢筋混凝土靶板在弹丸冲击和爆炸载荷作用下的响应进行了有限元数值模拟，其中模拟参数由实验数据拟合重新获取。将模拟结果与实验结果和经验公式进行对比分析，结果表明：数值模拟再现了弹体贯穿靶板过程中的开坑、隧道及漏斗碎裂区，计算得到的弹体弹道极限及残余速度与实验数据吻合较好；此外，数值模拟也很好地再现了炸药爆炸后冲击波的传播过程以及爆炸载荷作用下混凝土的破坏情况，模拟结果与实验现象具有良好的一致性。

Numerical Simulation of the Response of Reinforced Concrete Slabs to Projectile Impact or Explosive Loading

Numerical simulation is first conducted herein of the perforation of reinforced concrete slabs by an ogival-nosed projectile using LS-DYNA.The triaxial test data reported in this paper for the 48MPa concrete are used to determine the values of the parameters employed in the Holmquist-Johnson-Cook(HJC) model.It is shown that the numerical simulations correlate well with the experimental observations in terms of ballistic limit,residual velocity,impact crater,penetration tunnel and scabbing crater.The respons...