MCA方法在模拟弹丸侵彻混凝土中的应用

Application of MCA Method on Penetration of Projectile Into Concrete Target

从运动学的基本原理出发,推导出适于高速侵彻的移动元胞自动机法的计算模型,在模型中采用了位移、应力、体积应变等三开关破坏准则.应用该模型对弹丸侵彻混凝土进行数值模拟,再现了侵彻过程中弹丸的运动及混凝土的飞散、应力波的传播等物理现象.给出的侵彻深度等计算结果与14.5 mm弹道枪所获得的实验结果基本吻合,说明该计算方法可以有效计算和模拟高速侵彻问题.

Based on the kinematic principle, the computation model of movable cellular automata （MCA） method was presented for simulating the high-velocity penetration problems. Three failure criteria, such as the displacement, stress, and volume strain, were applied in model. The numerical simulation of penetration of projectile into concrete targets was completed by MCA method. Physical phenomena of the movement of projectile, the scattering of concrete, the propagation of stress wave in the target were reproduced by numerical simulation. The results of penetration depth are in good agreement with experimental results obtained from 14.5 mm gun. The numerical example above proves that this algorithm is efficient for simulating the high-rate penetration problems.