物体撞击颗粒介质的动力学研究  

The Dynamic Study of a Projectile Impacting Granular Medium

作　　者：叶见兰[1] 杨先清[1] 王振辉[1] 陈琼[1] 郭海萍[1] 

机构地区：[1]中国矿业大学理学院,江苏徐州221116

出　　处：《徐州工程学院学报（自然科学版）》2011年第1期79-84,共6页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：中央高校基本科研业务费专项资金资助项目(LK0203)

摘　　要：用分子动力学模拟方法研究物体撞击二维颗粒介质穿透过程的动力学行为.研究结果表明,物体的穿透过程可以分成三个阶段:撞击、贯穿和坍塌.通过改变物体的初速度、质量和半径,发现物体贯穿阶段所受的阻力虽与初速度和质量成正比,但与半径关系不大.The dynamic study of a projectile impacting a two-dimensional granular medium by molecular dynamic simulations was conducted. The results show that the impacting process can be divided into three stages： impact, penetration and collapse. By systematically varying the initial velocity, mass and radius of the projectile, it was found that the resistance of the projectile in penetration process is proportional to the initial velocity and mass, yet it is independent of the radius.

关 键 词：撞击 贯穿 坍塌 

分 类 号：O313[理学—一般力学与力学基础]