摘要
利用LS-DYNA有限元软件三维数值模拟了不同弹壳厚度下相同装药量的柱状装药在岩体洞库上方的爆炸破坏效应。数值模拟结果表明,有弹壳时,随着弹壳厚度的增加,爆炸破坏作用相应减小,但薄弹壳与无弹壳相比能够增强爆炸破坏作用。原因是,在弹壳较薄时,爆轰集聚效应能够增强爆炸破坏作用,但在弹壳达到一定厚度后,爆破弹壳的能量大幅增加,抵消了爆轰集聚效应并进而减弱爆炸破坏作用。由于钻地武器弹壳一般较厚,因此在其毁伤效应研究中,不应忽视弹壳对爆炸破坏作用的影响。
Explosion damage effectiveness of column charges on underground chamber was simulated with 3D-numerical finite-element method by using LS-DYNA, which varied in the thickness of casing of the same mass. The outcome of numerical simulation shows that explosion damage effectiveness decreases with the increase of casing thickness when charges have casing. But sheet casing can enhance explosion damage effectiveness compared with non-casing. The reason may be that detonation gathering effect is dominant if casing of charge is sheet. The detonation gathering effect can enhance explosion damage effectiveness. When casing thickness increases, the casing breaking energy will also increase. If casing exceeds a certain thickness, the casing breaking energy will counteract the detonation gathering effect and reduce explosion damage effectiveness. Because the casing of earth penetrator weapon is thick generally, the influence of casing on explosion damage effectiveness can＇t be ignored in the study on the damage effectiveness of earth penetrator weapons.
出处
《解放军理工大学学报（自然科学版）》
EI
2007年第5期501-504,共4页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
钻地武器
弹壳
数值模拟
爆炸
earth penetrator weapon
casing
numerical simulation
blasting
