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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.2; 20051026-28; Nanjing(CN) >The Mechanism of Long-tube Penetration Normal into Semi-infinite Homogeneous Target
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The Mechanism of Long-tube Penetration Normal into Semi-infinite Homogeneous Target

机译：长管穿透法向半无限均质靶的机理

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摘要

The projectile of large L/D has many disadvantages including fire, flight and impact, especially loading in the tank. A new extending structure can reach the purpose of short projectile and large penetrator at one time. It can alleviate the troubles caused by the large L/D projectile. In this paper, a model of long tubular penetration normal into homogeneous semi-infinite target is established on basis of elastic-plastic momentum theory in cylindrical coordinate, which is validated by experiments. The model can describe the mechanism of the long tubular penetration normal into semi-infinite target at ordnance velocity and is more accurate than other models. The depth of penetration increases linearly with the increasing of initial velocity, which is similar to that of long rod. The numerical simulation of the penetration is carried out by nonlinear dynamic finite codes. The physical status of penetration is got, so do the law of the variation of some parameters. Every portion of the long tube has different descending rate of velocity. The velocity of the end descends more slowly than other portion of the long tube. The kinetic energy of the long tube descends linearly with time. This observation will give advices to the design of new structure projectile.
机译：大型L / D弹丸具有许多缺点，包括着火，飞行和撞击，尤其是坦克中的装载。一种新的扩展结构可以同时达到短弹丸和大穿透力的目的。它可以减轻大型L / D弹丸带来的麻烦。本文基于圆柱坐标系中的弹塑性动量理论，建立了长管穿透法向均匀半无限目标的法线模型，并进行了实验验证。该模型可以描述长管状弹道法线以弹丸速度射入半无限目标的机理，并且比其他模型更准确。穿透深度随着初始速度的增加而线性增加，这与长杆的相似。穿透的数值模拟是通过非线性动态有限代码进行的。得到了穿透的物理状态，一些参数的变化规律也得到了。长管的每个部分都有不同的速度下降率。端部的速度下降的速度比长管的其他部分慢。长管的动能随时间线性下降。该观察将为新结构弹丸的设计提供建议。

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