锥角对具有PELE效应的EFP成型影响的数值仿真分析
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摘要
为增强反轻型装甲目标弹药的毁伤能力,提出了一种内含低密度装填材料的变壁厚弧锥结合药型罩。使用有限元软件LS-DYNA分析了各锥角对爆炸成型弹丸(EFP)成型的影响规律和EFP对靶板的侵彻效应,拟合得到EFP成型参数曲线与EFP成型速度的曲线方程。结果表明,药型罩内锥角α_1取166°～170.2°,装填物内锥角α_2取160°～166°,装填物外锥角α_3取140°～152°,药型罩外锥角α_4取132°～140°时EFP成型速度较快、成型效果较好;α_3对EFP成型速度、长度与径向尺寸影响最大,α_1,对EFP中心厚度影响最大。基于研究结果对药型罩结构进行优化,优化后的药型罩能够形成具有明显横向效应增强型侵彻体(PELE)效应的EFP,在射入靶板时对其扩孔,并在穿透靶板后碎裂形成高速破片对目标内部进行二次毁伤。
To enhance the damage effectiveness of anti-light armor target ammunition, a kind of variational-wall-thickness arc-cone liner with low-density loading material was proposed. The influence law of each cone angle on explosively formed projectiles(EFP) forming and the penetration effect of EFP on target plate were analyzed by finite element software LS-DYNA. The curve of EFP forming parameters with each cone angle was obtained by fitting. Results show that when the inner cone angle α_1 of liner takes 1 66°-1 70.2°,the inner cone angle α_2 of filler takes 1 60°-1 66°, the outer cone angle α_3 of filler takes 1 40°-1 52°, the outer cone angle a4 of liner takes 1 32°-1 40°, the EFP forming speed is fast and forming effect is good. The α_3 has the greatest influence on the forming speed, length and radial dimension of EFP, and the a, has the greatest influence on the center thickness of EFP. Based on the research results, the structure of the liner was optimized. The optimized liner can form an EFP with distinct penetrator with enhanced lateral efficiency(PELE) effect, which expands the hole when penetrating the target plate and forms some high-speed fragments in the target interior to cause secondary damage after penetrating the target plate.
To enhance the damage effectiveness of anti-light armor target ammunition, a kind of variational-wall-thickness arc-cone liner with low-density loading material was proposed. The influence law of each cone angle on explosively formed projectiles(EFP) forming and the penetration effect of EFP on target plate were analyzed by finite element software LS-DYNA. The curve of EFP forming parameters with each cone angle was obtained by fitting. Results show that when the inner cone angle α_1 of liner takes 1 66°-1 70.2°,the inner cone angle α_2 of filler takes 1 60°-1 66°, the outer cone angle α_3 of filler takes 1 40°-1 52°, the outer cone angle a4 of liner takes 1 32°-1 40°, the EFP forming speed is fast and forming effect is good. The α_3 has the greatest influence on the forming speed, length and radial dimension of EFP, and the a, has the greatest influence on the center thickness of EFP. Based on the research results, the structure of the liner was optimized. The optimized liner can form an EFP with distinct penetrator with enhanced lateral efficiency(PELE) effect, which expands the hole when penetrating the target plate and forms some high-speed fragments in the target interior to cause secondary damage after penetrating the target plate.
引文
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[11]尹建平,刘同鑫,张洪成,等.结构参数对半预制破片PELE弹丸毁伤性能的影响[J].含能材料,2014,22(2):226-229.YIN Jian‐ping,LIU Tong‐xin,ZHANG Hong‐cheng,et al. Influ‐ence of structure parameters on efficiency of half‐premade frag‐mented PELE[J]. Chinese Journal of Energetic Materials(Han?neng Cailiao),2014,22(2):226-229.
[12]吴义锋.点环起爆多模成型装药机理研究[D].南京:南京理工大学,2007.WU Yi‐feng. Mechanism study of muti‐mode shaped charge inpoint‐ring ignition[D]. Nanjing:Nanjing University of Scienceand Technology,2007.
[13]陈刚,陈忠富,徐伟芳,等.45钢的J‐C损伤失效参量研究[J].爆炸与冲击,2007(2):131-135.CHEN Gang,CHEN Zhong‐fu,XU Wei‐fang,et al. Investiga‐tion on the J‐C ductile fracture parameters of 45 steel[J]. Explo?sion and Shock Waves,2007(2):131-135.
[14] Steinberg D J.Equation of state and strength properties of select‐ed materials,UCRL‐MA‐106439[R]. Livermore:LawrenceLivermore National Laboratory,1991.
[15]曹兵.EFP成形机理及关键技术研究[D].南京:南京航空航天大学,2001.CAO Bing. Research on EFP forming mechanism and key tech‐nologies[D]. Nanjing:Nanjing University of Aeronautics andAstronautics,2001.
[16]朱建生,赵国志,杜忠华,等.靶板厚度对横向效应增强型侵彻体作用效果的影响[J].南京理工大学学报(自然科学版),2009,33(4):474-479.ZHU Jian‐sheng,ZHAO Guo‐zhi,DU Zhong‐hua,et al. Influ‐ence of target thickness on lateral effect of PELE[J].Journal ofNanjing University of Science and Technology(Natural Sci?ence),2009,33(4):474-479.
[2] Arnold W,Rottenkolber E,Hartmann T. Axially switchablemodes warheads[C]//28th Internationl Symposium on Ballis‐tics,Atlanta,Georgia,22‐26 September,2014:289-300.
[3] Cardoso D,Teixeira‐Dias F. Modelling the formation of explo‐sively formed projectiles(EFP)[J]. International Journal of Im?pact Engineering,2016,93:116-127.
[4]李伟兵,王晓鸣,李文彬,等.弧锥结合罩的结构参数对EFP成型的影响[J].火工品,2008(6):48-53.LI Wei‐bing,WANG Xiao‐ming,LI Wen‐bin,et al. Effect ofConfiguration parameters of arc‐cone liner on formation of ex‐plosively formed penetrator[J]. Initiators&Pyrotechnics,2008(6):48-53.
[5]刘建青,顾文彬,唐勇,等.变壁厚球缺罩爆炸成型弹丸成型性能的数值模拟[J].解放军理工大学学报(自然科学版),2008,9(2):172-176.LIU Jian‐qing,GU Wen‐bin,TANG Yong,et al. Numerical in‐vestigation on EFP forming performance with variational‐wall‐thickness hemispherical liner[J]. Journal of PLA University ofScience and Technology,2008,9(2):172-176.
[6] Paulus G,Chanteret P Y,Wollmann E. PELE:A new penetra‐tor‐concept for the generation of lateral effects[C]//21th Inter‐national Symposium on Ballistics,Adelaid,Australia,19‐23April,2004:104-110.
[7]蒋建伟,张谋,门建兵,王树有. PELE弹侵彻过程壳体膨胀破裂的数值模拟[J].计算力学学报,2009,26(4):568-572,584.JIANG Jian‐wei,ZHANG Mou,MEN Jian‐bing,et al. Numeri‐cal simulation of penetration process for PELE projectileagainst target[J]. Chinese Journal of Computational Mechan?ics,2009,26(4):568-572,584.
[8]翟盛才.PELE对轻型装甲目标毁伤机理的研究[D].南京:南京理工大学,2010.ZHAI Sheng‐cai. Research on damage mechanism of PELE tolight armor[D]. Nanjing:Nanjing University of Science andTechnology,2010.
[9] Stephan Kerk. PELE——the future ammunition concept[C]//21th International Symposium on Ballistics,Adelaide,Austra‐lia,2004:1134-1144.
[10] Paulus G,Schirm V. Impact behaviour of PELE projectiles per‐forating thin target plates[J]. International Journal of Impact En?gineering,2006,33(1):566-579.
[11]尹建平,刘同鑫,张洪成,等.结构参数对半预制破片PELE弹丸毁伤性能的影响[J].含能材料,2014,22(2):226-229.YIN Jian‐ping,LIU Tong‐xin,ZHANG Hong‐cheng,et al. Influ‐ence of structure parameters on efficiency of half‐premade frag‐mented PELE[J]. Chinese Journal of Energetic Materials(Han?neng Cailiao),2014,22(2):226-229.
[12]吴义锋.点环起爆多模成型装药机理研究[D].南京:南京理工大学,2007.WU Yi‐feng. Mechanism study of muti‐mode shaped charge inpoint‐ring ignition[D]. Nanjing:Nanjing University of Scienceand Technology,2007.
[13]陈刚,陈忠富,徐伟芳,等.45钢的J‐C损伤失效参量研究[J].爆炸与冲击,2007(2):131-135.CHEN Gang,CHEN Zhong‐fu,XU Wei‐fang,et al. Investiga‐tion on the J‐C ductile fracture parameters of 45 steel[J]. Explo?sion and Shock Waves,2007(2):131-135.
[14] Steinberg D J.Equation of state and strength properties of select‐ed materials,UCRL‐MA‐106439[R]. Livermore:LawrenceLivermore National Laboratory,1991.
[15]曹兵.EFP成形机理及关键技术研究[D].南京:南京航空航天大学,2001.CAO Bing. Research on EFP forming mechanism and key tech‐nologies[D]. Nanjing:Nanjing University of Aeronautics andAstronautics,2001.
[16]朱建生,赵国志,杜忠华,等.靶板厚度对横向效应增强型侵彻体作用效果的影响[J].南京理工大学学报(自然科学版),2009,33(4):474-479.ZHU Jian‐sheng,ZHAO Guo‐zhi,DU Zhong‐hua,et al. Influ‐ence of target thickness on lateral effect of PELE[J].Journal ofNanjing University of Science and Technology(Natural Sci?ence),2009,33(4):474-479.