卵形弹体侵彻混凝土开坑区侵彻阻力计算

柴传国; 皮爱国; 武海军; 黄风雷

doi:10.11883/1001-1455(2014)05-0630-06

卵形弹体侵彻混凝土开坑区侵彻阻力计算

doi: 10.11883/1001-1455(2014)05-0630-06

北京理工大学爆炸科学与技术国家重点实验室，北京 100081

基金项目: 国家自然科学基金项目（11202029）

详细信息

作者简介:
柴传国(1986—), 男, 博士研究生

中图分类号: O385
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- 被引次数: 0
出版历程
- 收稿日期: 2013-05-03
- 修回日期: 2013-09-18
- 刊出日期: 2014-09-25

A calculation of penetration resistance during cratering for ogive-nose projectile into concrete

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 为了研究弹体开坑过程中，弹头表面应力的表达形式，采用高速摄影仪记录弹体在开坑区的位移和时间关系，得到卵形弹体在开坑区的速度和侵深关系。采用最小二乘法对开坑区结束时消耗的弹体动能和侵深关系进行分析，提出开坑过程中弹头表面的应力形式。计算结果表明，该应力形式能较好地描述高速条件下开坑区的侵深和速度关系。
- 爆炸力学 /
- 侵彻阻力 /
- 最小二乘法 /
- 卵形弹体 /
- 混凝土 /
- 高速
Abstract: Penetration experiments were conducted to explore an expression formula for the stress endured by the nose of the projectile during cratering.To obtain the relation between penetration velocity and penetration depth, the relation between penetration depth and time was recorded by using a high-speed camera.And the least square method was used to analyze the relation of the kinetic energy consumed by the projectile with the penetration depth at the end of cratering.Thereby, an expression formula was proposed for the stress endured by the nose of the projectile during cratering.The calculation results display that the proposed stress formula can describe the relation between the penetration velocity and the crater depth under high-velocity impact.
- mechanics of explosion /
- penetration resistance /
- least square method /
- ogive-nose projectile /
- concrete /
- high velocity

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图 1 2种型号弹体结构示意图

Figure 1. Schematic of two kind of ogive_-nose projectiles

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图 2 侵彻过程中开坑区照片

Figure 2. Pictures of crater region during penetration process

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图 3 弹头参量示意图

Figure 3. Penetration parameters of ogive-nose projectile

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图 4 最小二乘法对弹体开坑过程中耗能的拟合分析

Figure 4. Fitted curves of kinetic energy decrease during cratering

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图 5 OP2型弹开坑区侵彻速度和侵深的关系

Figure 5. Relation between penetration velocity and penetration depth during cratering

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图 6 OP5型弹开坑区速度和侵深的关系

Figure 6. Relation between penetration velocity and penetration depth during cratering

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表 1 开坑区在侵彻过程中的数据

Table 1. Experimental data of crater region during penetration process

z_c/m			v/(m·s^-1)			z_c/m			v/(m·s^-1)
OP2(Ⅰ)	OP2(Ⅱ)	OP2(Ⅲ)	OP2(Ⅰ)	OP2(Ⅱ)	OP2(Ⅲ)	OP5(Ⅰ)	OP5(Ⅱ)	OP5(Ⅲ)	OP5(Ⅰ)	OP5(Ⅱ)	OP5(Ⅲ)
0	0	0	431.2	607.6	431.2	0	0	0	419.3	608.3	780.0
0.020	0.026	0.020	427.2	599.2	427.2	0.018	0.032	0.016	416.2	601.3	779.9
0.040	0.061	0.040	418.6	583.2	418.6	0.041	0.064	0.034	412.9	581.2	771.1
0.060	0.094	0.060	410.7	568.5	410.7	0.065	0.094	0.052	406.0	569.5	749.5
0.078	0.124	0.078	397.1	550.0	397.1	0.087	0.124	0.070	398.0	560.6	734.7
0.097		0.097	383.0		383.0	0.109	0.153	0.087	385.3	537.3	720.9
0.115		0.115	378.1		378.1	0.130		0.104	972.0		707.0
0.132		0.132	363.6		363.6	0.151		0.120	354.6		692.9
								0.136			678.5
								0.152			663.8

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表 2 最小二乘法拟合用的数据

Table 2. Parameters for least square fitting

OP2				OP5
z_c/m	v_s/(m·s^-1)	v_c/(m·s^-1)	ΔE_i/kJ	z_c/m	v_s/(m·s^-1)	v/(m·s^-1)_c	ΔE_i/kJ
0.132	431.2	363.6	37.610	0.151	419.3	354.6	35.050
0.124	607.6	550.0	46.674	0.153	608.3	537.3	56.936
0.126	767.7	661.5	106.247	0.152	780.0	663.8	117.439

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参考文献(7)

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