柱形装药土介质爆炸成坑效应的数值模拟研究  

Numerical Simulation Study of Effects of Crater Formed by Explosion in Soil Medium with Cylindrical Charge

作　　者：毕天齐 王卫宏 BI Tianqi;WANG Weihong(Forensic Science Academy,Criminal Investigation Police University of China,Shenyang 110000,China)

机构地区：[1]中国刑事警察学院刑事科学技术学院,辽宁沈阳110000

出　　处：《科技创新与生产力》2024年第3期131-136,共6页Sci-tech Innovation and Productivity

摘　　要：本文指出在爆炸案件中,为便于携带、掩人耳目,犯罪分子采用的炸药包装物常为瓶、罐等柱形物体;土体是爆炸现场的常见介质,土介质爆炸成坑效应的研究对爆炸案的现场重建等技术工作具有重要意义。为了研究柱形装药土介质爆炸成坑效应,通过量纲分析得出了一定条件下炸坑比例直径、炸坑比例深度是柱体比例半径和比例埋深的二元函数,并通过LS-DYNA模拟了不同柱体比例半径、比例埋深的爆炸成坑过程,根据模拟实验数据拟合出了该函数关系,最终得到了爆炸抛掷作用直径、炸坑真实深度与装药半径、炸药埋深之间的关系。This paper points out that in explosive cases,in order to facilitate the packaging and conceal the eyes and ears,the explosive packaging used by criminals is of ten bottles,cans and other cylindrical bodies;soil is a common medium at the explosion site,and the effects of crater formed by explosion in soil medium is of great significance to criminal technical work such as the reconstruction of the scene of the explosion.In order to study effects of crater formed by explosion in soil medium with cylindrical charge,through dimensional analysis method,it is obtained that the scaled diameter and scaled depth of the crater under certain conditions are binary functions of the scaled radius and scaled burial depth of the explosive,and the explosion process of cylindrical charge with different scaled radius and scaled buried depth is simulated by LS-DYNA,according to the obtained simulation experimental data,the function relationship is fitted,and finally the relationship between the diameter of the explosion throwing action,the real depth of the crater,the radius of the charge and the buried depth of the explosive is finally restored.

关 键 词：柱形装药 土介质 爆炸成坑效应 爆炸抛掷作用直径 炸坑真实深度 数值模拟 LS-DYNA 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ560.1[化学工程—炸药化工] O643.221[理学—物理化学]