前舱物对低速大质量平头弹侵彻金属薄板的影响

刘雨佳; 侯海量; 李茂; 金键; 戴文喜

doi:10.11858/gywlxb.20190830

前舱物对低速大质量平头弹侵彻金属薄板的影响

doi: 10.11858/gywlxb.20190830

刘雨佳^1,,
侯海量^1,*, ,,
李茂²,
金键¹,
戴文喜³

1.
海军工程大学船舶与海洋学院，湖北武汉　430033
2.
海军研究院，北京　100161
3.
中国舰船研究与设计中心，湖北武汉　430064

基金项目: 国家自然科学基金（51679246）

详细信息

作者简介:
刘雨佳（1995－），男，硕士研究生，主要从事舰船防护结构研究. E-mail: liuyj1995@qq.com

通讯作者:
侯海量（1977－），男，博士，副教授，硕士生导师，主要从事舰船抗爆抗冲击研究. E-mail: hou9611104@163.com

中图分类号: O385
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出版历程
- 收稿日期: 2019-08-29
- 修回日期: 2019-10-04
- 发布日期: 2019-12-25

Influence of Nose Cabin on Low Speed Blunt Projectile during Penetration of Metal Plate

LIU Yujia^1
,,
HOU Hailiang^{1,*
, ,},
LI Mao²,
JIN Jian¹,
DAI Wenxi³

1.
College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China
2.
Naval Research Academy, Beijing 100161, China
3.
China Ship Design and Research Center, Wuhan 430064, Hubei, China

摘要

摘要: 为了研究前舱物对低速大质量平头弹侵彻金属薄靶的影响，根据前舱物的力学特性，将前舱物等效为轻质泡沫铝材料，建立了含前舱物的平头弹结构有限元分析模型，开展了不同工况下带前舱物平头弹侵彻金属薄板的数值模拟计算，分析了带前舱物平头弹侵彻金属薄板的过程，对比了带前舱物平头弹和不计前舱物平头弹在不同工况下剩余速度的差异。数值计算结果表明：带前舱物平头弹与不计前舱物平头弹的侵彻过程存在明显差异，但靶板破坏模式相同；前舱物等效材料的屈服强度对平头弹侵彻性能的影响很小，可以忽略不计；前舱物有助于提高平头弹侵彻金属薄板的能力，但提升幅度有限。在实际工程应用中，可以忽略前舱物对平头弹侵彻金属薄板的影响。
- 前舱物 /
- 平头弹 /
- 金属薄靶 /
- 变截面刚度弹体模型
Abstract: In order to study the effect of nose cabin on projectile low speed and high mass during the penetration of metal plates, a finite element analysis model of blunt projectile with nose cabin was established. Based on the mechanical properties, nose cabin can be regarded as equivalent to light foam aluminum material. Numerical simulation of blunt projectile with nose cabin penetrates into metal plates under different working conditions were implemented. The progress of projectile with nose cabin penetrates into metal plate was analyzed. The difference between residual velocity of blunt projectile with and without nose cabin was compared. The results show that there are significant differences in the progress of projectiles penetration into metal plates between blunt projectiles with and without nose cabin. Nevertheless, the failure modes for both conditions are similar. The yield stress of equivalent material of nose cabin has limited influence on penetrative performance of projectile. In conclusion, nose cabin can bring very limited improvement to the penetration capability of blunt projectile, and the effect of nose cabin can be neglected in practical engineering applications.
- nose cabin /
- blunt projectile /
- metal plates /
- model of variable section stiffness projectile

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图 1 泡沫铝材料载荷-位移曲线

Figure 1. Loading-displacement curve for aluminum foam material

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图 2 带前舱物战斗部等效计算模型

Figure 2. Equivalent calculation model of projectile with nose cabin

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图 3 侵彻过程

Figure 3. Progress of perforation

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图 4 靶板应力分布

Figure 4. Stress distribution of target

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图 5 速度时程曲线

Figure 5. Velocity-time curve

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图 6 靶板应变云图

Figure 6. Strain distribution of the target

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图 7 不同靶板厚度时的剩余速度对比

Figure 7. Comparison of residual velocity with different target thickness

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图 8 不同侵彻速度下的剩余速度对比

Figure 8. Comparison of residual velocity with different initial velocity

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表 1 弹体和靶板的J-C模型参表

Table 1. J-C model parameters of projectile body and target

Material	ρ/（g·cm^–3）	E/GPa	μ	c_p/（J·kg^–1·K^–1）	T₀/K	T_m/K
Warhead shell	7.80	205	0.28	400.90	300	1 765
Target plate	7.80	200	0.30	452.00	298	1 881

Material	$\dot \varepsilon $/s^–1	A/MPa	B/MPa	n	C	m
Warhead shell	1	760	500	0.53	0.014	1.13
Target plate	1	355	450	0.36	0.022	1.00

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表 2 弹塑性硬化模型材料参数

Table 2. Material parameters of the Elastoplastic hardening model

Material	ρ/（kg·m^–3）	E/GPa	μ	σ_y/MPa	E_t/MPa	β	c/s^–1	p	f_s
Charge	1 750	5	0.3	20	300	0	0	0	5
Nose cabin	700	0.5	0.3	0.5–10.0	0	0	0	0	0.4

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表 3 不同等效屈服强度下侵彻结果的比较

Table 3. Comparison of penetration results with different yield stress

Equivalent yield strength/MPa	Distortion range/mm	Residual velocity/（m·s^–1）
0.5	2 629.70	325.88
1.0	2 624.41	326.30
2.0	2 629.31	326.37
5.0	2 625.23	326.75
10.0	2 659.20	326.86

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