定型装药射流对块石混凝土目标的穿透性能研究

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Impact Engineering Pub Date : 2024-07-24 DOI:10.1016/j.ijimpeng.2024.105060
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引用次数: 0

摘要

通过实验和数值模拟研究了定形装药射流对块石混凝土目标的穿透性能。实验表明,射流在穿透块石混凝土的过程中会发生偏转等现象。改进了以往学者构建骨料颗粒的方法,使颗粒模型更接近骨料的真实形状。提出了一种基于普鲁克坐标系判断骨料颗粒交点的新方法。与传统方法相比,该方法不受骨料颗粒形状的限制。通过利用动态模拟软件复制混凝土目标生产过程中的骨料沉降,成功建立了混凝土的三维中尺度模型。根据实验设置进行了数值模拟,结果表明实验和数值模拟之间具有良好的一致性,从而证实了本文所介绍的模型和方法的可靠性。此外,数值模拟结果表明,骨料含量对射流的干涉程度、穿透深度和破坏区范围有显著影响,而冲击位置则主要影响射流的挠度。考虑到混凝土的三维中尺度模型,本文为今后研究定形电荷射流的穿透和破坏机理提供了一种数值模拟方法。
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Research on the penetration performance of shaped charge jet into block stone concrete targets

Experiment and numerical simulation were conducted to investigate the penetration performance of shaped charge jet into block stone concrete targets. The experiment has shown that the jet undergoes deflection and other phenomena during its penetration of block stone concrete. Improvements have been made to the methods used by previous scholars for constructing aggregate particles, resulting in a particle model that more closely resembles the true shape of the aggregate. A novel method for judging the intersection of aggregate particles based on the Plucker coordinate system was proposed. In comparison with traditional methods, this method is not constrained by the shape of aggregate particles. By utilizing dynamic simulation software to replicate aggregate settlement during the production process of concrete targets, a 3D meso-scale model of concrete was successfully established. Numerical simulations were conducted according to the experimental settings, with the results demonstrating good consistency between the experimental and numerical simulations, thus confirming the reliability of the model and methodology presented in this article. Additionally, the numerical simulation results suggest that the aggregate content significantly influences the degree of interference, penetration depth, and damage zone range of the jet, while the impact position primarily affects the deflection of the jet. This article provides a numerical simulation method for future research on the penetration and damage mechanism of shaped charge jet considering the 3D meso-scale model of concrete.

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来源期刊
International Journal of Impact Engineering
International Journal of Impact Engineering 工程技术-工程:机械
CiteScore
8.70
自引率
13.70%
发文量
241
审稿时长
52 days
期刊介绍: The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications
期刊最新文献
Crack arrest characteristics and dynamic fracture parameters of moving cracks encountering double holes under impact loads Performance assessment of an innovative light and compact dust shield for DISC onboard Comet Interceptor/ESA space probes Analysis and evaluation of suitability of high-pressure dynamic constitutive model for concrete under blast and impact loading Dynamic failures at the metal-glass interface under impact loading Comparative investigation of shock pressure, shock duration, pressure decay time, and elastic energy of both porous gelatin and pure gelatin in shock state
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