基于SPH算法的钢球高速撞击肥皂数值仿真

Numerical Simulation of High-Velocity Steel Sphere Impacting with Soap Based on SPH Algorithm

运用光滑粒子流体动力学分析方法,对钢球高速侵彻肥皂靶标进行了数值仿真分析。建立了钢球与肥皂高速撞击数值计算模型,运用侵蚀接触算法,求解了高速钢球侵彻肥皂的动力响应时间历程,获取了钢球侵彻肥皂靶标的侵彻深度与投射物速度关系图和瞬态Von-Mises等效应力云图,分析了高速碰撞过程及碰撞过程中空腔的形成和变化情况,并与实验结果及Lagrange数值仿真结果对照,计算结果具有良好精度,表明运用SPH方法能够较好地描述高速撞击现象。文中的研究表明,SPH技术是开展创伤弹道研究的有效手段。

A smoothed particle hydrodynamics algorithm was introduced to simulate the physical process of steel sphere penetrated against soap drone with a high speed. By this way, a numerical simulation model of the steel sphere impacting with soap drone in high-speed was established ,dynamic response time history was calculated by the eroding contact algorithm. The penetration-velocity relationship diagram of projectiles and transient Von-Mises equivalent stress-nephogram, the course of the high-speed impacting, the quantitative change of the formation and the change condition of the cavity in the process of the high-speed impacting were analyzed. By comparison with the results of experiment and Lagrange method, the simulation results of this text have well precision. It shows the SPH algorithm can charac- terize the process of high-speed impacting. The investigation of this message indicates that the SPH method is an effective way to study on wound ballistics research.