利用sph无网格方法 对子弹侵彻粑板进行数值模拟，避免了拉格朗日网格在高速撞击模拟中由于自身网格特性产生网格畸变(The SPH meshless method is used to simulate the projectile penetrating the cake plate, which avoids the grid distortion produced by the Lagrange grid in high speed impact simulation due to its