AUTODYN带壳装药破片冲击响应研究
关键词 破片 带壳装药 临界起爆速度 AUTODYN
毕业论文设计说明书外文摘要
Title The study on the response for shelled explosive under fragments impact
Abstract
With the numerical simulation,the threshold velocities of shelled explosive impacted by fragments with different parameters were gained.The rule of different parameters’ influence on the threshold velocity was analyzed，which included the material of fragments,the material of shell,the thickness of shell,the head shape of fragment and the L/D ratios of fragments.The result of numerical simulation coincides with the Jacobs-Roslund formula.The characteristic parameter A,B of different material which were used in Jacobs-Roslund formula were gained by the MATLAB.The critical detonating velocities calculated by the Jacobs-Roslund formula meet the result of experiment well,which expand the scope of application of Jacobs-Roslund formula.Besides,theoretical caculation model is established，the result of numerical simulation are validated by detonation criteria。The result proved the theoretical calculation model may have limitations.It can provide a reference for experiment in the future.
Keywords fragments shelled explosive the critical detonating velocities AUTODYN
目 录
1 绪论 1
1.1 引言 1
1.2 带壳装药破片冲击响应研究的国内外研究现状 3
1.3 本文研究的主要内容 5
2 破片冲击带壳装药理论基础 7
2.1 非均质炸药起爆机理及判据 7
2.1.1 热点理论 7
2.1.2 热点形成机制 7
2.1.3 非均质炸药冲击起爆的判据 9
2.2 破片冲击带壳装药简化模型 11
3 破片冲击带壳装药的仿真分析 14
3.1 AUTODYN软件简介 14
3.2 仿真模型的建立 15
3.3 炸药冲击起爆情况在AUTODYN中的判定 17
3.4 带壳Comp B炸药冲击起爆过程分析 18
3.5 数值仿真结果及分析 21
3.5.1 数值仿真结果与实验结果对比 21
3.5.2 挡板厚度对临界速度的影响 21
3.5.3 材料对临界起爆速度的影响 22
3.5.4 破片头部形状对临界速度的影响 23
3.5.5 破片长径比对临界速度的影响 24
3.6 经验公式验证及理论计算 24
3.6.1 经验公式验证 24
3.6.2 理论计算 26
结 论 30
致 谢 31
参考文献32
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