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摘要针对破甲弹战斗部中常用双锥罩聚能装药结构，研究双锥罩射流形成机理，找出双锥罩结构参数对射流成型的影响规律。首先，本文理论分析了聚能射流和双锥罩射流成型机理，分析了双锥罩射流的成型过程。然后，采用LS-DYAN有限元软件，仿真研究了双锥罩的上锥角、下锥角、罩厚、罩高以及起爆方式等影响因素对射流成型的影响，获得了各结构参数对射流成型的影响规律。利用正交试验与数值模拟相结合的方法，对双锥罩结构进行正交设计，结果表明双锥罩参数对射流头部速度、头尾速度差及射流长度影响的主次顺序均为：上锥角、罩高、罩厚、下锥角，其中上锥角对射流成型的影响最为显著；选择双锥罩上锥角为26°、下锥角为90°、罩厚为0.024D、罩高为1.1D时，射流成型效果较好。43292
毕业论文关键词 双锥药型罩 聚能装药 射流 数值模拟 正交设计
毕业设计说明书外文摘要
Title Design of Biconical liner Charge Warhead Structure
Abstract For usual biconical liner Shaped Charge structure in heat warhead, research biconical liner jet formation mechanism, and find out the influence discipline of structure parameters of biconical liner on jet molding. First, theoretical analysis of the text is the formation mechanism of the shaped jet and biconical jet and the molding process of bi-conical jet. Then, through the LS-DYAN that is a finite element software is analyzed, the influence of the biconical liner structure factor such as, the upper cone angle, the under cone angle, the liner height, the wall thickness, the initiation methods and so on, on the jet molding is studied, and the influence discipline of structure parameters of biconical liner on jet molding is gotten. The biconical liner structure orthogonal design is conducted by orthogonal experiment with numerical simulation. The result shows that the primary and secondary order of impact of structure parameters of biconical liner on velocity of jet head, velocity difference of head and tail and jet length is: the upper cone angle, the liner height, the wall thickness, the under cone angle, in which the impact of the upper cone angle on the tip velocity of jet is the most obvious. The tip velocity of jet increases with the decrease in the upper cone angle. When it is chosen that the upper cone angle defined 26°, the under cone angle defined 90°, the wall thickness defined 0.024D, the liner height defined 1.1D, the effect of jet molding is better.
Keywords biconical liner shaped charge jet numerical simulation orthogonal experiment
目 录
1 绪论1
1.1 研究背景与意义1
1.3 研究的主要内容和工作5
2 双锥罩射流成型理论分析6
2.1 聚能射流成型的理论模型6
2.2 双锥罩射流成型理论分析8
2.3 本章小结15
3 双锥罩射流影响因素分析17
3.1 数值模拟计算方法介绍17
3.2 战斗部结构方案及仿真模型建立19
3.3 双锥罩结构参数对射流成型的影响22
3.4 起爆方式对射流成型的影响27
3.5 本章小结29
4 双锥罩正交设计31
4.1正交设计因素水平表设计32
4.2 正交仿真数据分析33
4.3 双锥罩破甲战斗部设计37
4.4 本章小结40
结论41
致谢43
参考文献44
1 绪论
1.1 研究背景与意义
聚能装药战斗部能够充分利用炸药的聚能效应，方向性好，毁伤能力强[1]。其中药型罩是形成射流的关键部件，对于药型罩结构的研究，一直以来都是聚能战斗部研究的热点。双锥罩装药具有整个药型罩在破甲过程中都处于高效率状态的优点，被应用于各类聚能战斗部，如美国的“海尔法”、“陶式”以及我国的“红箭9”[2]。