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Modeling of Linear Shaped Charge Performance Using LS-Dyna

机译:使用LS-Dyna建模线性装药性能

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UPCO has developed the capability to model linear shaped charge jet formation and target penetration using the commercially available nonlinear dynamics code LS-Dyna. The simulation treats the explosive, sheath and target materials as fluid components in a two-dimensional Eulerian formulation. The explosive is modeled using the built-in HIGH_EXPLOSIVE_BURN material model and a JWL equation of state. Interaction between the explosive and sheath to form the jet, and between the jet and target for penetration are treated using Dyna's ALE_MULTI_MATERIAL capability. The use of this code is expected to provide a powerful analytical tool for determining core load, optimum standoff, sheath material and other design parameters. Examples of model calibration for lead Jet-cord penetration of aluminum targets and extrapolation to performance on a polycarbonate canopy target with comparison to experiment will be given. As a versatile general-purpose transient dynamic finite element code, LS-Dyna is also being used at UPCO for analyzing problems involving mechanical impact, fluid/structure interaction, shock formation and blast effects.
机译:UPCO已开发出使用市售的非线性动力学代码LS-Dyna对线性形状的电荷射流形成和目标穿透进行建模的功能。该模拟将炸药,护套和目标材料视为二维欧拉公式中的流体成分。使用内置的HIGH_EXPLOSIVE_BURN材料模型和JWL状态方程对炸药进行建模。使用Dyna的ALE_MULTI_MATERIAL功能可以处理炸药与护套之间形成的射流以及射流与目标之间的相互作用。预期使用此代码将提供强大的分析工具,以确定岩心载荷,最佳支座,护套材料和其他设计参数。将给出模型标定的示例,这些示例针对铝靶材的铅射流线渗透以及与聚碳酸酯顶棚靶材的性能外推,并与实验进行比较。作为通用的通用瞬态动态有限元代码,UPCO还使用LS-Dyna来分析涉及机械冲击,流体/结构相互作用,冲击形成和爆炸效应的问题。

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