摘要
根据现场岩体特性,将岩体剖分为结构体和结构面2部分,针对结构体构建了均质岩石本构模型,而后依据结构面分布特性,构建了考虑天然岩体非均质性的空间块体模型。采用这一空间块体模型,对重复打击效果进行了大量数值模拟分析,数值模拟与现场实验结果基本一致,两者均表明,因受残余弹片、命中点偏差和岩体非均质性等因素综合影响,多弹重复打击破坏深度存在着一个极限值。
This numerical simulation study was undertaken to investigate the penetration and explosion efficiency of a sequence of precision-guided earth penetrating weapon （EPW） into hard rock target. The main objective of the study was to ascertain the damage depth of using much more EPW, the relative depth would decreases with bomb number decreasing, the ultimate depth was limited. The sire ulations were performed using EP3D--a 3D explosion and penetration efficiency hydrocode. To describe the engineering rock body on the test site, it was divided into two parts, which were structure body and structure interface. A new rock constitutive model was built up for homogeneous structure body, and moreover, a space block model was brought out, which takes into account the non-homogeneousness of nature rock based on structure interface. Through this model, lots of numerical simulation works were done on repeat attack effect, and the numerical results agreed well with those of experiments, all of them made it clear that the ultimate damage depth of repeated attack was a limited value because of residual fragment, impact deviance and non-homogeneousness of nature rock.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2014年第3期361-366,共6页
Explosion and Shock Waves
基金
爆炸冲击防灾减灾国家重点实验室开放课题项目(DPMEIKF201304)
关键词
爆炸力学
钻地武器
重复打击
天然岩体
极限深度
mechanics of explosion
earth penetration weapon
repeat attack
nature rock
limiteddepth
