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摘要针对钽罩EFP战斗部结构设计，基于弧锥结合型药型罩，采用装药直径100mm的船尾型装药结构。通过对钽材料的物理、化学、力学性能及EFP成型理论的研究，分析了影响EFP毁伤元成型的关键因素，结合数值仿真对影响EFP成型的结构参数进行仿真计算。应用LS-DYNA有限元软件分析了装药结构参数（装药高度和船尾倾角）、药型罩结构参数（药型罩锥角、壁厚、圆弧曲率半径）、单点起爆方式下起爆点高度等对EFP成型的影响规律，找出每个参数的最佳取值范围。其中：起爆点高度取90mm，船尾倾角取45°，装药高度取80mm-100mm，药型罩锥角取142°-147°，药型罩壁厚取2.3mm-2.5mm，圆弧曲率半径取52mm-57mm之间时，EFP的成型效果较好。最后，对药型罩结构参数及装药高度进行灰关联分析，得出各因素对EFP成型的影响主次顺序。其中，对EFP毁伤元头部速度影响的主次顺序为：药型罩锥角、药型罩圆弧曲率半径、药型罩壁厚、装药高度；对EFP长径比影响的主次顺序为：药型罩锥角、药型罩壁厚、装药高度、药型罩圆弧曲率半径。按照参数影响主次，设计优化方案，得出较好钽罩EFP战斗部结构参数组合，其中：药型罩锥角为142°、药型罩壁厚为2.3mm、药型罩圆弧曲率半径为55mm、装药高度为90mm、船尾倾角为45°、起爆点高度为90mm。47990
毕业论文关键词 爆炸成型侵彻体 钽 药型罩 单点起爆 数值仿真 灰关联分析
毕业设计说明书外文摘要
Title Design Of EFP Warhead Structure With A Tantalum Liner
Abstract
For Tantalum Liner EFP warhead design, based on the arc-cone-shaped liner, the stern type charging structure which the charge diameter is 100mm is used. This paper analyzed the key factors that affect the EFP formation by studying the physical, chemical and mechanical properties of tantalum material, the numerical simulation is used to calculate the factors that affect the EFP formation. LS-DYNA finite element software is used to analysis the charge structural parameters (height and stern angle), structural parameters of liner (Liner cone angle, wall thickness, radius of curvature of the arc), single point of detonation initiation point for the effects of EFP formation, the optimal range of each parameters is determined, wherein: the detonation point is 90mm, the stern angle is 45°, the charge height takes 80mm-100mm, the liner cone angle takes 142°-147°, the liner thickness takes 2.3mm-2.5mm, the radius of curvature of the arc takes 52mm-57mm. Finally, the grey relational analysis on the structural parameters of liner and the charge height was made, and the the primary and secondary order of each factors on the EFP forming was obtained, for the head velocity of EFP: Liner cone angle, radius of curvature of the arc of liner, liner thickness, charge height; For the ratio of length to diameter of EFP: liner cone angle, liner thickness, charge height, radius of curvature of the arc of liner. According to the primary and secondary parameters, optimization design, the better parameters combination of EFP warhead was acquired: the Liner cone angle take 142 °, the liner thickness take 2.3mm, the radius of curvature of the arc liner is 55mm, the charge height is 90mm, the stern angle take 45 °, the height of the detonation point is 90mm.
Keywords Explosive Formed Projectile, Tantalum, Liner, Single-point Initiation, Numerical Simulation, Grey Relational Analysis
目 次
1 绪论 1
1.1 课题研究背景及意义 1
1.2.1 国外研究现状及发展 2
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