工程岩体中多弹重复打击效应的数值模拟分析

邓国强; 杨秀敏

doi:10.11883/1001-1455(2014)03-0361-06

工程岩体中多弹重复打击效应的数值模拟分析

doi: 10.11883/1001-1455(2014)03-0361-06

邓国强^,,
杨秀敏

总参工程兵科研四所，北京 100850

基金项目: 爆炸冲击防灾减灾国家重点实验室开放课题项目（DPMEIKF201304）

详细信息

作者简介:
邓国强(1972—), 男, 博士, 高级工程师

通讯作者:
Deng Guo-qiang, hnjia@sina.com

中图分类号: O385
计量
- 文章访问数: 2926
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- 被引次数: 0
出版历程
- 收稿日期: 2012-11-22
- 修回日期: 2013-05-29
- 刊出日期: 2014-05-25

Numerical simulation of the effect of multiply EPW into engineering rock

Deng Guo-qiang^,,
Yang Xiu-min

No.4 Engineering Research Institute, GSHQ, Beijing 100850, China

摘要

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。
- 爆炸力学 /
- 钻地武器 /
- 重复打击 /
- 天然岩体 /
- 极限深度
Abstract: 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 simulations 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.
- mechanics of explosion /
- earth penetration weapon /
- repeat attack /
- nature rock /
- limited depth

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图 1 考虑压实效应的状态方程

Figure 1. Equation of state with crushed effect

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图 2 JHR本构模型

Figure 2. JHR constitutive model

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图 3 空间块体模型构造

Figure 3. Constructor of space block body model

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图 4 空间块体模型的数值模拟结果

Figure 4. Numerical simulation results by space block body model

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图 5 嵌入爆炸效应的计算模型

Figure 5. Simulation model with explosion effect

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图 6 6发弹典型重复打击效果

Figure 6. Typical effect of repeated attack by six SAP

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图 7 第4发弹命中不同位置的效果

Figure 7. Penetration effect of the fourth SAP in various location

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图 8 第5发弹命中不同位置的效果

Figure 8. Penetration effect of the fifth SAP in various location

下载: 全尺寸图片幻灯片

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