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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Finite element simulation of the behaviours of laminated armour systems against blast wave and projectile dynamic impacts
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Finite element simulation of the behaviours of laminated armour systems against blast wave and projectile dynamic impacts

机译：层状装甲系统对爆炸波和弹丸动力冲击行为的有限元模拟

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摘要

For investigating the blast wave and fragment/projectile protective performance of laminated armour systems, backed with, or without, air spacers, two-dimensional finite element models were developed using the commercial finite element software Autodyn. In this investigation, four differently shaped projectiles, including flat-faced cylindrical projectile, blunt cylindrical projectile, ogive-nose projectile and spherical projectile, were considered. The blast load was simplified as a triangular pulse. For validating the present models, a comparison of the present numerical results with the analytical and expermental results available in literature was conducted. A good agreement between them was noted. Subsequently, a parametric study was conducted to examine the effects of the key parameters on the dynamic responses of an armour systems against blast wave or projectile impact. The results indicated that the residual (or exit) velocity of projectile, the rear surface deflection of the armour system against a projectile impact and the peak value of the pressure measured in a water body simultant are dependent on the armour component property and configuration. Under the assumption that the components of laminated armour systems are perfectly bonded together and remain so on impact, the results showed that the inclusion of an air spacer onto the rear surface of the armour system may play an important role in reducing the peak pressure, residual (or exit) velocity of the projectile and the rear surface deflection of the armour system.
机译：为了研究带有或不带有空气间隔器的层压装甲系统的爆炸波和碎片/弹丸防护性能，使用商业有限元软件Autodyn开发了二维有限元模型。在这项研究中，考虑了四种不同形状的弹丸，包括平面圆柱形弹丸，钝圆柱形弹丸，钝鼻弹丸和球形弹丸。爆炸载荷简化为三角形脉冲。为了验证当前模型，进行了当前数值结果与文献中可用的分析和实验结果的比较。他们之间达成了良好的协议。随后，进行了参数研究，以检查关键参数对装甲系统对爆炸波或弹丸撞击的动力响应的影响。结果表明，弹丸的残余（或出口）速度，装甲系统抵抗弹丸撞击的后表面挠度以及在水体模拟物中测得的压力峰值均取决于装甲组件的特性和配置。在假设叠层装甲系统的组件完美地结合在一起并保持撞击力的假设下，结果表明在装甲系统的后表面上包含空气隔离物可能在降低峰值压力，残余压力方面起着重要作用。 （或出口）弹丸的速度和装甲系统的后表面偏转。

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