切缝药包爆炸作用机理数值模拟

申涛; 罗宁; 向俊庠; 高祥涛

doi:10.11883/bzycj-2017-0410

切缝药包爆炸作用机理数值模拟

doi: 10.11883/bzycj-2017-0410

申涛^{1, 2},
罗宁^{1, 2, 3, ,},
向俊庠^{1, 2},
高祥涛⁴

1.
中国矿业大学深部岩土力学与地下工程国家重点实验室, 江苏徐州 221116
2.
中国矿业大学力学与土木工程学院, 江苏徐州 221116
3.
中国科学技术大学近代力学系, 安徽合肥 230027
4.
贵州省公安厅治安总队, 贵州贵阳 550001

基金项目:

国家自然科学基金项目 11502282

国家自然科学基金项目 51579239

学科前沿科学研究专项面上项目 2017XKQY013

中国博士后基金项目 2014M551700

详细信息

作者简介:
申涛(1993-), 男, 硕士研究生

通讯作者:
罗宁, nluo@cumt.edu.cn

中图分类号: O382
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- 被引次数: 0
出版历程
- 收稿日期: 2017-11-10
- 修回日期: 2017-12-14
- 刊出日期: 2018-09-25

Numerical simulation on explosion mechanism of split-tube charge holders

SHEN Tao^{1, 2},
LUO Ning^{1, 2, 3
, ,},
XIANG Junxiang^{1, 2},
GAO Xiangtao⁴

1.
State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
2.
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
3.
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China
4.
Guizhou Public Security Bureau, Guiyang 550001, Guizhou, China

摘要

摘要: 为研究切缝药包定向控制爆炸机理，基于双缝/耦合切缝药包爆轰行为高速纹影实验，建立"炸药-切缝管-空气"模型，采用数值模拟方法研究切缝药包爆炸过程中冲击波相互作用、爆炸流场压力时空分布和切缝管形态变化。研究结果表明：切缝药包爆炸过程中切缝管能够有效控制爆炸能量释放和爆生气体动力学行为；切缝方向压力超前且高于非切缝方向；在爆炸冲击波及爆生气体共同作用下，切缝管曲率不断变小且从起爆点处以相同的变形特征沿切缝管轴向发展；数值模拟结果与实验结果吻合。
- 定向控制 /
- 爆破 /
- 切缝药包 /
- 爆生气体 /
- 高速纹影
Abstract: To explore the directional-control blasting mechanism of a split-tube charge holder, a model was established by coupling explosive, a split-tube, and air. On the basis of the experimental results of the double split-tube charge holder by the high-speed schlieren system, the established model was used to carry out numerical simulations to investigate the interaction of shock waves, the spatial and temporal distribution of pressure in the explosion fields, and the morphological changes of the split-tube. The investigated results show that in the explosion processes of the split-tube charge holder, the split-tube can effectively control the energy release of explosive and the dynamic behavior of detonation gas; the pressure in the cutting direction appears earlier and it is higher than those in the non-cutting directions; under the joint action of the explosion shock waves and the detonation gas, the curvature of the split-tube decreases continuously and develops along the axial direction of the split-tube with the same deformation characteristics from the initiation detonation point; the numerical simulation results are in agreement with the experimental ones.
- directional control /
- blasting /
- split-tube charge holder /
- detonation gas /
- high-speed schlieren

HTML全文

图 1 几何模型参数与边界设置

Figure 1. Geometric model parameters and boundary settings

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图 2 有限元网格与局部放大网格

Figure 2. Finite element meshes and local amplified meshes

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图 3 冲击波相互作用机理模型

Figure 3. Shock wave interaction mechanism model

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图 4 切缝药包爆轰过程高速纹影实验和数值模拟结果

Figure 4. Experimental and numerical simulation results for the detonation process of a split-tube charge holder

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图 5 5个特征单元的位置

Figure 5. Positions of five elements

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图 6 有无切缝管时药包内部单元压力时程曲线

Figure 6. Pressure-time curves in the inside elements of the charge with and without split-tube

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图 7 特征单元的位置

Figure 7. Positions of elements

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图 8 有切缝管时药包外部单元压力时程曲线

Figure 8. Pressure-time curves in the outside elements of the charge with split-tube

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图 9 特征单元的位置

Figure 9. Positions of elements

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图 10 有/无切缝管时药包环向压力峰值与峰值时刻

Figure 10. Circumferential peak pressures and their corresponding times of the charge with and without split-tube

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图 11 切缝管形态变化过程

Figure 11. Morphological change process of split-tube

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表 1 铜管参数^[16]

Table 1. Parameters of copper pipe^[16]

ρ/(g·cm^-3)	G₀/GPa	σ₀/GPa	β	n	γ₁	σ_m/GPa	b	b′	h
8.93	47.7	0.12	36.0	0.45	0	0.64	2.83	2.83	3.77×10^-4
f	A	T_m0/K	γ₀	a	p_cut/GPa	K_spall	C/(m·s^-1)	S₁	a_G^*
0.001	63.5	1 790.0	2.02	1.4	-9.0	3.0	3 940	1.49	0.47
注：a_G^*指Grüneisen状态方程中的参数a。

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