大着速范围长杆弹侵彻深度变化及其影响因素的数值模拟

徐晨阳; 张先锋; 刘闯; 邓佳杰; 郑应民

doi:10.11858/gywlxb.20170592

大着速范围长杆弹侵彻深度变化及其影响因素的数值模拟

doi: 10.11858/gywlxb.20170592

南京理工大学机械工程学院, 江苏南京 210094

基金项目:

中共中央组织部青年拔尖人才支持计划 2014

中央高校基本科研业务专项基金 30917011104

中央高校基本科研业务专项基金 30916011305

国家自然科学基金委员会与中国工程物理研究院联合基金 U1730101

详细信息

作者简介:
徐晨阳(1992—), 男，硕士研究生，主要从事冲击动力学研究.E-mail:xcynjust@126.com

通讯作者:
张先锋(1978—), 男，博士，教授，主要从事高效毁伤与防护研究.E-mail:lynx@njust.edu.cn

中图分类号: O385
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出版历程
- 收稿日期: 2017-06-15
- 修回日期: 2017-06-25

Depth of Penetration and Its Influence Factors of Long Rod Projectile Impacting on Semi Infinite Target with Elevated Velocity

School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 高速/超高速侵彻问题一直是武器设计者和防护工程专家关注的焦点问题之一。随着撞击速度的提高，弹体可能进入流体侵彻阶段，侵彻深度不再随速度的增大单调上升。针对撞击速度增加侵彻深度可能出现增量逆转的现象，开展了大着速范围长杆弹侵彻深度变化的数值模拟研究，分析了弹体硬度、头部形状、弹体材料及靶体材料对侵彻转变点的影响。结果表明：随着长杆弹冲击速度的提升，侵彻深度先上升后下降；同时，弹体硬度提高，到达侵彻转变点对应的撞击速度提高；尖卵形头部弹体到达侵彻转变点的撞击速度比球形头部弹体高；此外，弹靶材料对侵彻深度转变也有较大的影响。
- 超高速侵彻 /
- 长杆弹 /
- 侵彻深度 /
- 转变点
Abstract: Hypervelocity penetration is an important issue for a weapon designer and protection engineering experts.With the increase of the impact velocity, a projectile may transition into a fluid penetration phase, and its depth of penetration (DOP) no longer rises monotonously with the velocity.Numerical simulation of the penetration processes of a long rod projectile at an elevated impact velocity was performed to analyze the variation and influencing factors of the transition point.Influences of the hardness, nose shape, material of the projectile and the target on the transition point of DOP were simulated.The simulation results show that, with the increase of the impact velocity, the DOP increases at first and then decreases at a certain velocity (called the transition velocity).The velocity of the transition point improves with the increase of the projectile's hardness.The Ogive-headed projectile has a higher transition point than the spherical-headed projectile.Moreover, the projectile/target material also has significant effects on the transition point.
- hypervelocity penetration /
- long rod projectile /
- depth of penetration /
- transition point

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图 1 长杆弹侵彻深度理论计算曲线

Figure 1. Theoretical DOP results of LRP at elevated impact velocity

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图 2 有限元模型

Figure 2. Finite element model

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图 3 撞击速度为967 m/s时弹靶变形过程

Figure 3. Simulation of normalized DOP and deformation at 967 m/s impact velocity

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图 4 模拟侵深与实验数据对比

Figure 4. Comparison between simulation normalized DOP and experimental data

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图 5 不同硬度弹体侵彻深度-速度曲线

Figure 5. Normalized DOP versus impact velocity for projectile with different hardnesses

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图 6 不同头部形状弹体侵彻深度-速度曲线

Figure 6. Normalized DOP versus impact velocity for projectile with different nose shapes

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图 7 不同靶体材料侵彻规律

Figure 7. Normalized DOP versus impact velocity for target with different materials

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图 8 不同材料弹体的侵彻规律

Figure 8. Normalized DOP versus impact velocity for projectiles with different materials

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表 1 弹体仿真模型主要参数

Table 1. Basic parameters of projectile

A/MPa	B/MPa	n	C	D₁	D₂	D₃	D₄
1 069	710.1	0.459	0.047	0.239	8.593	6.67	0.009

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表 2 靶体仿真模型主要参数

Table 2. Basic parameters of target

G/MPa	Y/MPa	β	n	G_p	G_T/(MPa·K^-1)	Y_p	T/K
2 760	680	125	0.1	1.8	-17	0.018	1 220

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表 3 30CrMnSiNi2A材料的J-C模型参数^[20]

Table 3. J-C Parameters of 30CrMnSiNi2A materials^[20]

H_RC	A/MPa	B/MPa	n	C	D₁	D₂	D₃	D₄
31	745	623.11	0.424	0.061	0.351	1.650	2.589	0.020
36	814	643.57	0.446	0.055	0.348	2.673	4.333	0.012
45	1 269	810.18	0.479	0.040	0.239	8.593	7.867	0.009
55	1 516	1 537.97	0.610	0.017	0.014	0.015	3.251	0.007

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表 4 不同硬度条件下侵彻转变阶段的弹体速度范围

Table 4. Range of projectile velocity in the transition stage with different hardnesses

H_RC	Velocity range/(m·s^-1)
31	806-1 100
36	832-1100
45	967-1216

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表 5 不同头部形状弹体参数

Table 5. Geometric size of rod with different nose

Head shape	R/mm	L₀/mm	d/mm	ρ/(g·cm^-3)	m/g
Ball	3.5	71.00	3.5	7.83	21
Ogive, φ=2	14.2	73.26	3.5	7.83	21
Ogive, φ=3	21.3	73.61	3.5	7.83	21
Ogive, φ=4	28.4	74.56	3.5	7.83	21

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表 6 弹体材料参数

Table 6. Parameters of projectile material

Material	ρ/(g·cm^-3)	A/MPa	B/MPa	n	C	D₁	D₂	D₃	D₄
30CrMnSiNi2A	7.83	745	623.11	0.424	0.061	0.351	1.650	2.589	0.020
Tungalloy	17.70	631	1 258.00	0.092	0.014	0	0.330	-1.500	0

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