| 装药弹体侵彻混凝土厚靶中的炸药摩擦起爆模型 |
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| 引用本文： | 李德聪,陈力,丁雁生.装药弹体侵彻混凝土厚靶中的炸药摩擦起爆模型[J].爆炸与冲击,2009,29(1):13-17. |
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| 作者姓名： | 李德聪 陈力 丁雁生 |
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| 作者单位： | 1.中国科学院力学研究所，北京 100080 |
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| 摘 要： | 基于炸药的热爆炸理论，采用炸药的热点温度（也称为临界起爆温度）作为起爆判据，分析了装药弹体在侵彻混凝土厚靶过程中的炸药安全性问题，建立了炸药摩擦起爆的热传导模型。对模型进行了量纲一化分析，得出量纲一热流率幅值Qm与炸药和弹壳界面量纲一温度峰值Tmax的关系，以及可在实际工程中应用的临界量纲一控制参数Qmc，同时得到了反映摩擦产生的热量在炸药与弹壳间分配比例关系的量纲一参数Ⅰ。结果表明，炸药装药和弹壳接触面间的强摩擦是形成热点、从而导致炸药早炸的一个重要因素。
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| 关 键 词： | 爆炸力学 热传导模型 临界起爆温度 炸药安全性 侵彻 |
A model of explosion induced by friction in the process of loaded projectiles penetrating into concrete targets |
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| LI De-cong,CHEN Li,DING Yan-sheng.A model of explosion induced by friction in the process of loaded projectiles penetrating into concrete targets[J].Explosion and Shock Waves,2009,29(1):13-17. |
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| Authors: | LI De-cong CHEN Li DING Yan-sheng |
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| Affiliation: | 1.Institute of Mechanics, Chinese Academy of Science, Beijing 100080, China |
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| Abstract: | Based on the thermal explosion theory, the security of loaded projectiles penetrating into concrete targets was investigated. By taking the hot-spot temperature (also called the critical initial explosion temperature) as the initial explosion criterion, the thermal conductivity model was introduced. The relationship between the dimensionless heat flow density Qm and the dimensionless peak temperature T′max, which were located in the interface between explosive charge and cartridge case, was acquired. The dimensionless control parameter Qmc, which can be used as the engineering criterion, and the dimensionless parameter KⅠ, which denotes the proportion of the received heat energy between explosive charge and cartridge case, were obtained. The results show that the intense friction between explosive charge and cartridge case is an important factor for the formation of hot spots which can cause projectiles to explode ahead of schedule. |
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| Keywords: | mechanics of explosion thermal conductivity model critical initial explosion temperature explosive security penetration |
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