摘要
为研究装药在混凝土中的爆炸破坏效应,利用LS-DYNA对有无预制孔以及预制孔填充土壤3种情况下的半无限混凝土介质中柱形装药的爆炸破坏过程进行了数值模拟研究.通过与实验结果比较,确定了计算模拟方法的有效性.通过数值模拟,定量研究了无填充预制孔、预制孔填充土壤以及无预制孔情况下,混凝土损伤破坏区域的大小.研究结果表明,无预制孔情况下爆腔和漏斗坑尺寸最大,无填充预制孔时最小.比较了3种工况下,同一位置点处质点的抛掷速度.
In order to investigate the damage effect of explosion in concrete targets,the damaging processes of semi-infinite concrete targets with and without pre-drilled cavity and pre-drilled cavity with soil under explosion of cylindrical charge are numerically simulated using LS-DYNA program. The simulation method and material models of concrete are verified by comparing the simulation results with the experimental data. The damage zones of concrete targets under three cases are obtained by numerical simulations. The results show that radiuses of blasting crater and blasting funnel under the case of no pre-drilled cavity is biggest,and under the case of pre-drilled cavity is least. The particle velocities of the same location of concretes under three cases are compared by numerical simulations.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2010年第6期635-638,共4页
Transactions of Beijing Institute of Technology
基金
国家重点实验室基金资助项目(ZDKT08-04)
北京理工大学优秀青年教师资助计划(000Y02-11)
关键词
柱形装药
混凝土
数值模拟
漏斗坑
cylindrical charge
concrete
numerical simulation
crater
