成层式防护结构抗超高速侵彻的数值分析

刘峥; 程怡豪; 邱艳宇; 邓国强; 王明洋

doi:10.11883/bzycj-2017-0181

成层式防护结构抗超高速侵彻的数值分析

doi: 10.11883/bzycj-2017-0181

刘峥¹,
程怡豪¹,
邱艳宇^{1, 2},
邓国强^3, ,,
王明洋^{1, 2}

1.
陆军工程大学爆炸冲击防灾减灾国家重点实验室, 江苏南京 210007
2.
南京理工大学机械工程学院, 江苏南京 210094
3.
工程兵科研四所, 北京 100850

基金项目:

国家自然科学基金青年基金项目 51409258

国家自然科学基金面上项目 11772355

教育部长江学者和创新团队发展计划项目 IRT13071

详细信息

作者简介:
刘峥(1983-), 男, 博士研究生, 助理工程师

通讯作者:
邓国强, hnjia@sina.com

中图分类号: O385
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- 被引次数: 0
出版历程
- 收稿日期: 2017-05-23
- 修回日期: 2017-09-08
- 刊出日期: 2018-11-25

Numerical analysis on hypervelocity penetration into layered protective structure

LIU Zheng¹,
CHENG Yihao¹,
QIU Yanyu^{1, 2},
DENG Guoqiang^{3
, ,},
WANG Mingyang^{1, 2}

1.
State Key Laboratory of Disaster Prevention and Mitigation of Explosive and Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
2.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
3.
No.4 Research Institute of Engineering Corps, Beijing 100850, China

摘要

摘要: 采用SPH算法，基于AUTODYN-2D开展了钨杆弹对4种"花岗岩遮弹层-（空气）干砂分配层-混凝土结构层"形式的成层式防护结构的超高速打击数值计算分析，得到了结构的破坏特征和能量分配情况。结果表明：（1）增加打击速度会加剧遮弹层和分配层的破坏程度，但在一定速度区间内结构层的侵彻深度反而随着打击速度的增加而减小；（2）结构层的能量分配比例具有随着撞击速度增加而减小的趋势，这可以初步归结为竖向冲击动能在遮弹层和分配层的横向传递；（3）一定条件下，通过增加空气隔层可以减小结构层的侵彻深度、结构层分配能量的比例和绝对值。
- 超高速侵彻 /
- 成层式防护结构 /
- 能量分配 /
- SPH
Abstract: In this study, based on SPH and using AUTODYN-2D, we analyzed the hyper velocity penetration of tungsten rod into four types of layered shielding structures consisting of granite shielding layer, air/sand distribution layer and concrete structure layer, and obtained the structures' damage and energy distribution, with the following results achieved:(1) Although raising the striking velocity increased the damage of the shielding layer and the distributing layer, the penetration depth into the structure layer decreased within a certain velocity range; (2) The ratio of the energy conducted to the structure layer generally decreased with increasing of the striking velocity, and this could be attributed to the transverse propagation of the impact energy within the shielding layer and distributing layer; (3) Under certain conditions, addition of an air layer could reduce the penetration depth into the structure layer, the ratio and absolute value of the energy conducted to the structure layer.
- hypervelocity penetration /
- layered protective structure /
- energy distribution /
- SPH

HTML全文

图 1 数值计算模型1A和1B

Figure 1. Numerical models as 1A and 1B

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图 2 结构的整体破坏现象

Figure 2. Structure's general damages

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图 3 混凝土层的侵彻深度变化

Figure 3. Penetration depth of concrete layers

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图 4 混凝土层的破坏现象

Figure 4. Damage phenomena of concrete layers

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图 5 能量分配的计算结果汇总

Figure 5. Energy distribution based on calculated results

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图 6 结构速度场分布云图(相邻粗实线间距2 000 mm)

Figure 6. Nephogram of structures' absolute velocity distribution (distance between adjacent bold lines=2 000 mm)

下载: 全尺寸图片幻灯片

表 1 数值模型几何参数

Table 1. Geometrical parameters of numerical models

几何模型方案	长径比L_p/D	岩石遮弹层/m	空气隔层/m	砂分配层/m	混凝土结构层/m	总厚度/m
1A	4	3.0	0	3	4	10.0
1B	4	3.0	3	3	4	13.0
2A	8	4.5	0	3	4	11.5
2B	8	4.5	3	3	4	14.5

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