混凝土靶侵爆条件下破坏深度的模型实验研究

卢浩; 岳松林; 孙善政; 宋春明; 熊自明

doi:10.11883/bzycj-2020-0191

混凝土靶侵爆条件下破坏深度的模型实验研究

doi: 10.11883/bzycj-2020-0191

陆军工程大学爆炸冲击防灾减灾国家重点实验室，江苏南京 210007

基金项目: 国家自然科学基金（51808552）

详细信息

作者简介:
卢　浩（1987－　），男，博士，讲师，lh829829@163.com

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-10
- 修回日期: 2021-01-31
- 网络出版日期: 2021-06-30
- 刊出日期: 2021-07-05

Model test study on damage depth of concrete target under penetration and explosion

State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing, 210007, Jiangsu, China

摘要

摘要: 为研究混凝土靶侵彻后空腔对爆炸效应的影响，开展了450～700 m/s速度下混凝土靶体侵彻与爆炸模型实验。基于10组实验结果，结合量纲分析等方法，研究了侵彻结果对爆坑深度的影响。结果表明，可采用无量纲冲击系数表征侵彻深度、开坑体积以及侵彻损伤值等侵彻效应，不考虑装药长径比的影响，侵彻后爆炸带来的破坏深度增加量h_e主要受无量纲冲击系数I_p与爆炸系数I_e的影响。利用实验数据获得了长径比为5时h_e的影响规律：(1) I_p较小时，侵彻深度较小，I_e的变化对爆炸弹坑深度h_e变化影响较小；(2) 随着I_p的增加，h_e不断增加，但增加幅度逐渐变小，I_e对h_e的影响不断变大；(3)随着I_p增加到一定程度，h_e趋于常数，I_e对h_e的影响趋于稳定。
- 侵彻 /
- 爆炸 /
- 混凝土靶 /
- 冲击系数 /
- 破坏深度 /
- 模型实验
Abstract: In order to study the influence of the cavity on the explosion effect caused by the penetration of concrete target, model tests of penetration and explosion of concrete target at the velocity of 450–700 m/s were carried out. Based on 10 sets of test results and dimensional analysis, the effect of penetration result on the depth of blast hole is studied. Results indicate that the dimensionless impact coefficient I_p can be used to characterize the penetration effects such as penetration depth, hole volume and penetration damage value, regardless of length-diameter ratio of charge, the increase of damage depth is mainly influenced by dimensionless impact coefficient I_p and explosion coefficient I_e. Based on the experimental data, influence rule of the depth of crater is obtained for the length-diameter ratio of 5: (1) when the I_p is small, the penetration depth is small, the change of I_e has little influence on the depth of crater h_e; (2) with the increase of I_p, h_e increases at a decreasing rate, influence of I_e on h_e increases; (3) with the increase of I_p to a certain extent, h_e tends to reachsaturation value, influence of I_e on h_e tends to be stable.
- penetration /
- explosion /
- concrete target /
- impact coefficient /
- damage depth /
- model test

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图 1 实验用素混凝土靶

Figure 1. Plain concrete target for test purposes

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图 2 实验用弹体

Figure 2. Projectile for test purposes

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图 3 实验用药柱

Figure 3. Explosive columns for test purposes

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图 4 侵彻实验现场与扫描结果图

Figure 4. Penetration testing field and 3D model of crater

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图 5 爆炸实验现场与扫描结果图

Figure 5. Explosion testing field and 3D model of crater

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图 6 侵彻爆炸实验结果对比图

Figure 6. Comparison of penetration explosion test results

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图 7 侵彻坑体积与爆炸深度之间的关系

Figure 7. Relationship between penetration crater volume and depth of explosion

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图 8 侵彻隧道区深度与爆炸深度之间的关系

Figure 8. Relationship between depth of penetration in the tunnel region and depth of explosion

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图 9 侵彻坑体积与冲击系数之间的关系

Figure 9. Relationship between penetration crater volume and impact coefficient

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图 10 侵彻隧道区深度与冲击系数之间的关系

Figure 10. Relationship between depth of penetration in the tunnel region and impact coefficient

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图 11 爆炸作用下坑深增加量h_e与冲击系数之间的关系

Figure 11. Relationship betweenincreased depth of crater under explosion and impact coefficient

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表 1 侵彻实验结果

Table 1. Penetration test data

靶体	材料	v_p/（m·s⁻¹）	V_pc/cm³	h_p/m	h_pt/m	靶体	材料	v_p/（m·s⁻¹）	V_pc/cm³	h_p/m	h_pt/m
1	C30	479.20	299	0.211	0.136	6	C30	567.47	405	0.262	0.172
2	C30	488.73	162	0.221	0.129	7	C40	548.82	168	0.225	0.142
3	C30	512.37	209	0.226	0.151	8	C40	566.25	162	0.234	0.146
4	C30	525.27	207	0.232	0.144	9	C40	612.52	256	0.253	0.178
5	C30	551.13	355	0.267	0.186	10	C40	675.75	338	0.279	0.187

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表 2 爆炸实验结果

Table 2. Explosion test data

靶体	h_p/m	m_e/g	h_pe/m	h_e/m	靶体	h_p/m	m_e/g	h_pe/m	h_e/m
1	0.211	39.25	0.231	0.020	6	0.262	39.25	0.295	0.033
2	0.221	39.25	0.246	0.025	7	0.225	39.25	0.241	0.016
3	0.226	39.25	0.256	0.030	8	0.234	39.25	0.255	0.021
4	0.232	39.25	0.263	0.031	9	0.253	39.25	0.299	0.025
5	0.267	39.25	贯穿	＞0.233	10	0.279	39.25	0.315	0.036

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