聚脲涂覆钢板在爆炸载荷作用下的动态响应

王殿玺; 郭香华; 张庆明

doi:10.11858/gywlxb.20180650

聚脲涂覆钢板在爆炸载荷作用下的动态响应

doi: 10.11858/gywlxb.20180650

北京理工大学机电学院，北京　100081

详细信息

作者简介:
王殿玺（1993－），男，硕士研究生，主要从事多层结构防爆、抗侵彻研究. E-mail: 17801118808@163.com

通讯作者:
郭香华（1974－），男，博士，副教授，主要从事相场方法、装甲车防护研究. E-mail: guoxh@bit.edu.cn

中图分类号: O383.3
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出版历程
- 收稿日期: 2018-10-15
- 修回日期: 2018-12-02

Dynamic Response of Polyurea Coated Steel Plate under Blast Loading

School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 在验证了所用方法有效性的基础上，采用有限元软件LS-DYNA数值模拟了等面密度聚脲涂覆钢板结构及单一钢板在空爆下的动态响应，分析了聚脲涂覆位置对其抗爆性的影响；在此基础上，通过量纲分析的方法讨论了爆心距、炸药质量、涂覆聚脲厚度对钢板变形的影响规律。结果表明，聚脲涂覆在钢板上的位置影响其抗爆性能。其他变量一定的情况下，钢板中心最大位移随爆心距的增加近似呈指数递减趋势；改变炸药质量时，钢板中心最大位移随炸药质量的增加近似呈线性递增趋势；改变涂覆聚脲厚度时，钢板中心最大位移随涂层厚度的增加近似呈线性递减趋势。
- 聚脲涂覆钢板 /
- 量纲分析 /
- 位移 /
- 爆炸荷载 /
- 抗爆性能
Abstract: The dynamic response of the equivalent areal density polyurea-coated steel plate and a single steel plate under air blast loads is simulated by using the finite element software LS-DYNA after the validity of this method is demonstrated. The influence of polyurea coating position on its antiknock ability is analyzed; Besides, the method of dimension analysis is employed to study the response of the distance between explosive and steel plate, spherical charge’s quality, and the polyurea layer thickness on the deformation of steel plates based on the prior study. The results show that the position of polyurea coated on steel plate affects its antiknock performance. When other variables are assumed to be constant, the maximum displacement of the center of the steel plate exponentially decreased with the increase of the distance between the distance between explosive and steel plate; Moreover, when the quality of the explosive is changed, the maximum displacement of the steel plate increases linearly with the increase of the explosive mass; Also, when the thickness of the coated polyurea is changed, the maximum displacement of the steel sheet decreases linearly with the increase of the thickness of the coating.
- polyurea coated steel plate /
- dimensional analysis /
- displacement /
- blast load /
- antiknock ability

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图 1 球形TNT与聚脲涂覆钢板

Figure 1. Schematic of spherical TNT and polyurea coated steel plate

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图 2 聚脲涂覆钢板结构与炸药模型

Figure 2. Schematic of polyurea-coated structure and explosive

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图 3 试验中聚脲涂覆钢板的变形^[6]

Figure 3. Deformation of polyurea coated steel plate in test^[6]

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图 4 数值模拟中聚脲涂覆钢板的变形

Figure 4. Deformation of polyurea coated steel plate in simulation

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图 5 不同工况中钢板的位移云图

Figure 5. Displacement cloud chart of steel plate in different working conditions

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图 6 钢板最大变形处的位移时程曲线

Figure 6. Displacement-time curves at maximum deflections of steel plates

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图 7 钢板最大变形处的塑性应变时程曲线

Figure 7. Plastic strain-time curves at maximum deflections of steel plates

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图 8 爆心距对聚脲涂覆钢板最大位移的影响

Figure 8. Relationship between the detonation distance and the maximum displacement of polyurea coated steel plate

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图 9 炸药质量对聚脲涂覆钢板最大位移的影响

Figure 9. Relationship between the mass of explosive and the maximum displacement of polyurea coated steel plate

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图 10 聚脲层厚度对聚脲涂覆钢板最大位移的影响

Figure 10. Relationship between the thickness of polyurea layer and the maximum displacement of polyurea coated steel plate

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表 1 聚脲弹性体材料参数^[6]

Table 1. Parameters of polyurea elastomer material^[6]

Density/(kg·m^–3)	Tensile strength/MPa	Elongation at break/%	Tear strength/(kN·m^–1)	Shore hardness (HA)
1020	24	400	85	85–95

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表 2 结构设计方案

Table 2. Structural design schemes

Condition number	Structural diagram	Steel plate thickness/mm	Polyurea thickness/mm	TNT dose/kg	Detonation distance/mm
A1	Contrast condition	3	0	1	200
A2	Single steel plate	3.52	0	1	200
A3	Front coating	3	4	1	200
A4	Back coating	3	4	1	200
A5	Double sided coating	3	2+2	1	200
Note: Q235A steel plate; Polyurea.

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表 3 Q235A钢材料参数^[12]

Table 3. Parameters of Q235A steel material^[12]

Density/(kg·m^–3)	Young’s modulus/GPa	Poisson’s ratio	σ_Y/MPa	Tangent modulus/GPa	C/s^–1	P
7850	210	0.3	240	2	10⁵	5

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