SPH算法在高速侵彻问题中的应用

Smoothed Particle Hydrodynamics Algorithm Applied in Penetration Problem

采用光滑粒子流体动力学方法,数值模拟了弹丸高速侵彻靶板的过程。用黎曼问题中速度和压力的解代替基本粒子与近邻粒子速度和压力的平均值来描述粒子之间的相互作用,无需引入传统的人为粘性方法来处理冲击波过渡层。初步分析表明该数值模拟结果是合理的,因而所用数值方法对于冲击动力学问题的模拟是可行的。

The contact algorithm based on Riemann solution was used to simulate the penetration process of high velocity impact problems in two-dimension axisymmetrie coordinates. The artificial viscosity hadn＇ t been used when the velocities and stresses at the contact surface were determined by Riemann solution instead of the mean values of velocities and stresses between the contacting basic and surrounding particles. It shows the achieved result is the same as FEM, and the method can be applied in impact problems.