纤维织物袋的内爆响应与抗爆性能

解江; 高斌元; 蒋逸伦; 潘汉源; 冯振宇

doi:10.13801/j.cnki.fhclxb.20220630.003

纤维织物袋的内爆响应与抗爆性能

doi: 10.13801/j.cnki.fhclxb.20220630.003

解江^{1, 2, ,},
高斌元^{1, 2},
蒋逸伦^{1, 2},
潘汉源^{1, 2},
冯振宇^{1, 2}

1.
中国民航大学　安全科学与工程学院，天津 300300
2.
民航航空器适航审定技术重点实验室，天津 300300

详细信息

通讯作者:
解江，博士，副研究员，硕士生导师，研究方向为复合材料冲击动力学　E-mail: xiejiang5@126.com

中图分类号: O383
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出版历程
- 收稿日期: 2022-04-26
- 修回日期: 2022-06-12
- 录用日期: 2022-06-18
- 网络出版日期: 2022-07-01
- 刊出日期: 2023-04-15

Implosion response and anti-explosion performance of fabric bags

XIE Jiang^{1, 2
, ,},
GAO Binyuan^{1, 2},
JIANG Yilun^{1, 2},
PAN Hanyuan^{1, 2},
FENG Zhenyu^{1, 2}

1.
College of Safety Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
2.
Key Laboratory of Civil Aircraft Airworthiness Technology, CAAC, Tianjin 300300, China

摘要

摘要: 针对小型简易爆炸装置，设计了芳纶和超高分子量聚乙烯(UHMWPE)纤维织物防爆袋，开展了织物袋内爆试验，同时建立了织物袋内爆数值分析模型。从外部超压和临界厚度两个角度对比了两种材料织物袋的抗爆能力，分析了初始内爆距离和织物袋厚度对织物袋抗爆性能的影响。结果表明：内爆载荷下织物袋的主要失效模式为中心区域破孔和封口拉链失效。在20~100 g药量范围内，织物袋的临界厚度与药量近似呈线性增长关系。同一药量下，芳纶织物袋的临界厚度明显大于UHMWPE织物袋，在不考虑爆炸火球对织物烧蚀的影响时，UHMWPE织物袋具有更好的抗爆效果。厚度相同时，芳纶织物袋外部的超压峰值更小，表明芳纶织物袋的超压衰减能力更强。随着织物袋初始内爆距离的增大，织物袋的临界厚度减小。织物袋外部一定范围内存在高于人体能够承受的超压，以30 g TNT、3 mm厚芳纶织物袋为例，在距织物袋中心665 mm处的超压为34.2 kPa，超过鼓膜损伤阈值。
- 纤维织物袋 /
- 内爆载荷 /
- 动态响应 /
- 冲击波超压 /
- 有限元模型
Abstract: Aramid and ultra-high molecular weight polyethylene (UHMWPE) fiber fabric bags were designed for the disposal of improvised explosive device (IED). The implosion test was carried out, and a finite element (FE) model of fabric bag implosion was established. The anti-explosion abilities of the two fabric bags were compared from the perspectives of external overpressure and critical thickness, and the effects of the initial implosion distance and the thickness of the fabric bag on the anti-explosion ability were analyzed. The results show that the main failure modes of the fabric bag under implosion load are broken hole in the center area and the failure of the sealing zipper. The critical thickness of the fabric bag increases approximately linearly with the charge in the range of 20-100 g TNT charge. The critical thickness of the aramid fabric bag is significantly larger than that of the UHMWPE fabric bag when the charges are the same. The UHMWPE fabric bag has a better anti-explosion ability without considering the influence of the explosion fireball. When the thicknesses are the same, the overpressure outside the aramid fabric bag is smaller, indicating that the overpressure attenuation ability of the aramid fabric bag is better. As the initial implosion distance of the fabric bag increases, the critical thickness decreases. There is an overpressure higher than the human body which can withstand within a certain range outside the fabric bag. Taking the 30 g TNT, 3 mm aramid fabric bag condition as an example, the overpressure at 665 mm from the center of the fabric bag is 34.2 kPa, exceeding the eardrum damage threshold.
- fiber fabric bag /
- implosion load /
- dynamic response /
- shock wave overpressure /
- FEM

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图 1 织物袋实物图

Figure 1. Fabric bag

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图 2 三硝基甲苯(TNT)放置方式

Figure 2. Placement of tri-nitro-toluene (TNT)

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图 3 试验系统

Figure 3. Experimental setup

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图 4 20 g TNT作用下，1.2 mm厚芳纶织物袋的动态响应过程

Figure 4. Dynamic response process of 1.2 mm aramid fabric bag under the condition of 20 g TNT

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图 5 20 g TNT作用下，2.2 mm厚UHMWPE织物袋的动态响应过程

Figure 5. Dynamic response process of 2.2 mm UHMWPE fabric bag under the condition of 20 g TNT

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图 6 织物袋外部3个测点超压随时间的变化曲线

Figure 6. Variation curves of overpressure with time at three measuring points outside the fabric bag

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图 7 织物袋有限元模型

Figure 7. Finite element model of fabric bag

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图 8 两种织物的应力-应变曲线

Figure 8. Stress-strain curves of the two fabrics

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图 9 20 g TNT作用下试验和数值模拟得到的1.2 mm厚芳纶织物袋的动态响应过程对比

Figure 9. Comparison of dynamic response process of 1.2 mm aramid fabric bag by experiment and simulation under the condition of 20 g TNT

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图 10 20 g TNT作用下，试验和数值模拟得到的1.2 mm厚芳纶织物袋的失效模式

Figure 10. Failure modes of 1.2 mm aramid fabric bag obtained by experiment and simulation under the condition of 20 g TNT

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图 11 织物袋正上方距炸药0.5 m处压力

Figure 11. Pressure above fabric bag 0.5 m from explosive

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图 12 压力峰值时刻两种织物袋的形状

Figure 12. Shapes of two fabric bags at peak pressure

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图 13 织物袋临界厚度随药量的变化规律

Figure 13. Variation of critical thickness of fabric bags with TNT charge

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图 14 不同初始内爆距离下织物袋在不同时刻的形状

Figure 14. Shapes of the fabric bags with different initial implosion distances at different time

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图 15 织物袋临界厚度随初始内爆距离的变化规律

Figure 15. Variation of critical thickness of fabric bags with initial implosion distances

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图 16 30 g TNT作用下，3 mm厚芳纶织物袋外部不同距离处冲击波超压随时间的变化曲线

Figure 16. Variation curves of shock wave overpressure with time at different positions outside the 3 mm aramid fabric bag under the condition of 30 g TNT

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图 17 不同厚度芳纶织物袋外部测点超压随时间变化规律

Figure 17. Variation of external measuring point overpressure of different thickness aramid fabric bags with time

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图 18 不同厚度芳纶织物袋外部测点超压峰值对比

Figure 18. Comparison of overpressure peaks at measuring points of aramid fabric bags with different thickness

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表 1 各织物的主要物理参数

Table 1. Main physical parameters of fabrics

Material	Aramid	UHMWPE
Grade	F-268	ZTZ 24
Yarn fineness/tex	166	126±10
Yarn body density/(g·cm⁻³)	1.44	0.97
Yarn breaking elongation/%	≥3.2	3-3.5
Yarn tensile modulus/GPa	≥125	105-110
Fabric thickness/mm	0.3	0.55
Weave count/(yarns·(10 cm)⁻¹)	65×65	87×87
Areal density/(g·m⁻²)	210-220	235-245
Note: UHMWPE—Ultra-high molecular weight polyethylene.

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表 2 TNT参数

Table 2. Parameters of TNT

Parameter	Value
Density/(kg·cm⁻³)	1.63×10³
Detonation velocity/(m·s⁻¹)	6930
Detonation pressure/GPa	21
A/GPa	374
B/GPa	3.74
R₁	4.15
R₂	1.4
ω	0.35
E₀/(MJ·m⁻³)	7×10³
Notes: A, B, R₁, R₂, ω—Constants characterizing TNT properties; E₀—Detonation energy per unit volume.

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表 3 空气参数

Table 3. Parameters of air

Parameter	Value
Density/(kg·m⁻³)	1.29
C₄	0.4
C₅	0.4
C₁, C₂, C₃, C₆	0
E₀/(MJ·m⁻³)	0.25
Notes: C₀-C₆—Polynomial equation coefficients.

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表 4 不同药量下织物袋的临界厚度

Table 4. Critical thickness of fabric bags at different charges

Charge/g	Critical thickness/mm
Charge/g	Aramid fiber	UHMWPE
20	1.5	1.1
30	2.8	1.8
60	5.7	3.4
90	9.0	6.2
100	9.6	6.9

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表 5 30 g TNT作用下，不同初始内爆距离的织物袋的临界厚度

Table 5. Critical thickness of fabric bags with different initial implosion distances under the condition of 30 g TNT

Size/mm	Initial implosion distance/mm	Charge/g	Critical thickness/mm
Size/mm	Initial implosion distance/mm	Charge/g	Aramid	UHMWPE
900×800	50	30	2.8	1.9
	75		1.2	0.7
	100		0.8	0.4
	125		0.5	0.2

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表 6 30 g TNT作用下3 mm厚芳纶织物袋外部不同位置处的超压峰值

Table 6. Overpressure peaks at different positions outside the 3 mm aramid fabric bag under the condition of 30 g TNT

Distance from measuring point to explosive/mm	Charge/g	Overpressure peak/kPa
400	30	123.9
500		60.7
600		37.7
665		34.2
700		32.8
800		28.6

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