块石混凝土遮弹层界面对抗侵彻性能影响的数值模拟研究

柳兴旺; 邓旭艳; 秦青阳; 王银

doi:10.11858/gywlxb.20220669

块石混凝土遮弹层界面对抗侵彻性能影响的数值模拟研究

doi: 10.11858/gywlxb.20220669

1.
中国电力建设集团西北勘测设计研究院有限公司, 陕西西安　710065
2.
中国电力建设集团有限公司西南指挥部, 四川成都　610036
3.
济南大学土木建筑学院, 山东济南　250022

基金项目: 中国电力建设股份有限公司科技项目（DJ-ZDZX-2019-02）

详细信息

作者简介:
柳兴旺（1986－），男，博士，高级工程师，主要从事地下工程防灾设计及管理研究.E-mail：1915252557@qq.com

中图分类号: O385
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出版历程
- 收稿日期: 2022-10-05
- 修回日期: 2022-10-27
- 录用日期: 2023-03-09
- 网络出版日期: 2023-04-13
- 刊出日期: 2023-04-05

Numerical Investigation on Effect of Interface Modelling of Rock-Rubble Shielding Overlays on the Anti-Penetration Capability

1.
Powerchina Northwest Engineering Corporation Limited, Xi’an 710065, Shaanxi, China
2.
Powerchina Southwest Headquarters, Chengdu 610036, Sichuan, China
3.
School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, Shandong, China

摘要

摘要: 基于三维细观建模方法和Kong-Fang混凝土材料模型，开展了某弹体侵彻块石混凝土遮弹层的数值模拟研究。采用块石与基体混凝土共节点建模和面面接触建模两种方式，探讨了界面对弹体过载、侵彻深度以及混凝土与块石损伤破坏的影响。数值模拟结果表明：块石与混凝土共节点建模方式强化了块石与混凝土间的界面效应，高估了靶体的整体性，而面面接触建模方式弱化了界面效应，故采用共节点建模方式时，弹体过载（加速度）偏大，侵彻深度偏小；采用共节点建模方式时，损伤区域沿C100混凝土和块石交界面发展，损伤区域连续，而采用面面接触建模方式时，损伤区域在弹道近区连续，近区与远区损伤不连续。基于数值模拟结果，进一步对块石混凝土遮弹层的工程设计计算提出了实用性建议。
- 三维细观建模 /
- 块石混凝土遮弹层 /
- 侵彻 /
- 界面效应
Abstract: Based on the Kong-Fang concrete material model proposed recently and the three-dimensional mesoscopic model, the penetration of a typical warhead into rock-rubble overlays was numerically simulated. The influence of interface modelling of rock-rubble overlays on the projectile overload (or acceleration), penetration depth and failure in concrete and rock was discussed by considering two well-known methods, i.e., the conode method and surface-to-surface contact method. Numerical results demonstrated that the interface between concrete and rock is overestimated when using the conode method, leading to a larger projectile acceleration and a smaller penetration depth. While the surface-to-surface contact method underestimates the interface effect, resulting in a smaller projectile acceleration and a larger penetration depth. Furthermore, the damage evolutions are different: it is continuous and develops along the interface of concrete and rock using the conode method, while it is only continuous in the area near the projectile and becomes discontinuous beyond this area. Finally, based on the numerical simulations, the practical suggestions for engineering design of rock-rubble overlays are given.
- 3D mesoscale model /
- rock-rubble overlays /
- penetration /
- interface effect

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图 1 弹体尺寸

Figure 1. Projectile dimension

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图 2 弹体和块石混凝土有限元模型

Figure 2. Finite element models of projectile and rock-rubble overlays

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图 3 块石混凝土遮弹层数值建模步骤

Figure 3. Modelling procedure of rock-rubble overlays

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图 4 基体混凝土与块石之间相互作用的两种建模方式

Figure 4. Two modeling methods of interactions between matrix concrete and rock

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图 5 加速度时程曲线

Figure 5. Acceleration-time history curves

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图 7 接触力时程曲线

Figure 7. Contact force-time history curves

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图 6 侵彻深度时程曲线

Figure 6. Penetration depth-time history curves

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图 8 C100混凝土的损伤破坏

Figure 8. Damage of C100 concrete

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图 9 块石的损伤破坏

Figure 9. Damage of rubble

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图 10 弹体变形与偏转

Figure 10. Deformation and deflection of projectile

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图 11 固结体侵彻计算结果

Figure 11. Numerical simulation results of concretion target subjected to penetration

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表 1 C100混凝土模型参数

Table 1. Model parameters of C100 concrete

a₁	a₂	ε_frac	d₁	d₂	d₃	α
0.587 6	0.025/f_c	0.01	0.04	1.5	0.000 1	1.0

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表 2 HJC材料模型参数

Table 2. HJC material model parameters

Basic mechanical parameters				Damage parameters			Strain-rate parameter
ρ/(kg·m⁻³)	f_c/MPa	G/GPa	T/MPa	D₁	D₂	ε_min	C
2 600	120	28.7	8	0.04	1	0.01	0.007

Strength surface parameters				Pressure parameters
A	B	N	S_max	p_crush/MPa	μ_crush	K₁/GPa	K₂/GPa	K₃/GPa
0.3	2.5	0.007	7	40	0.002 16	12	25	42

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表 3 计算工况

Table 3. Calculation cases

Cases	Projectile property	Contact mode	Number
1	Rigid	Conede	R-1
2	Rigid	Surface-to-surface	R-2
3	Deformation	Conede	D-1
4	Deformation	Surface-to-surface	D-2

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