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首页> 外文期刊>Mechanics Based Design of Structures and Machines >High-Speed Penetration Modeling and Shape Optimization of the Projectile Penetrating into Concrete Shields
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High-Speed Penetration Modeling and Shape Optimization of the Projectile Penetrating into Concrete Shields

机译：弹丸侵彻混凝土盾构的高速侵彻建模与形状优化

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摘要

We generalize the existing engineering approaches to modeling of high-speed penetration of projectiles into semi-infinite concrete shields and suggest a modified semi-empirical two-stage model that is applicable for bodies of revolution with a flat bluntness. At the first stage of penetration (cratering), the resistance force is described as a linear function of the instantaneous distance between the nose of the impactor and the front surface of the shield, while at the second stage (tunneling), the resistance force is quadratic in the instantaneous velocity of the impactor. Using the developed model we determine the shape of the impactor, which penetrates at the maximum depth. It is found that the depth of penetration of the optimal impactors with the truncated-cone nose is close to the depth of penetration of the "absolute optimal" impactors. The suggested model can be generalized to three-dimensional impactors.
机译：我们归纳了现有的工程方法，以将弹丸高速穿透到半无限的混凝土盾构中进行建模，并提出一种改进的半经验两阶段模型，该模型适用于具有平坦钝度的旋转物体。在穿透的第一阶段（缩孔），阻力表示为冲击器鼻部和护罩前表面之间瞬时距离的线性函数，而在第二阶段（隧穿），阻力为冲击器的瞬时速度是二次方的。使用开发的模型，我们确定冲击器的形状，该形状会以最大深度穿透。发现最佳冲击器具有截头圆锥形鼻部的穿透深度接近“绝对最佳”冲击器的穿透深度。建议的模型可以推广到三维冲击器。

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