长径比对侵彻阻力的影响
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摘要
基于经典空腔膨胀理论、Forrestal阻力修正模型和加速度阻力模型研究了战斗部侵彻强度靶过程中长径比对于侵彻阻力的影响,通过对不同长径比条件下战斗部侵彻余速的计算,分析了长径比对阻力项系数的影响,讨论了3种理论的适用范围。结果表明:当战斗部长径比小于3时,加速度阻力项系数变化对侵彻过程影响较大;当长径比大于5时,3个模型的计算结果趋于一致,均适用于工程计算。
In this paper,the influence of the aspect ratio on the penetration resistance in the target penetration process of the warhead was studied based on the classical cavity expansion theory,the modified Forrestal resistance model and the acceleration resistance model.The influence of the aspect ratio on the resistance term coefficient was analyzed and the range of applicability of the three theories was discussed by calculating the penetration residual velocities of the warhead with different aspect ratios.The results show that the variation of the acceleration resistance term coefficient has a significant influence on the penetration process when the aspect ratio is below 3;when the aspect ratio is above 5,the results of the three models tend to converge,and they are all applicable to engineering calculation.
In this paper,the influence of the aspect ratio on the penetration resistance in the target penetration process of the warhead was studied based on the classical cavity expansion theory,the modified Forrestal resistance model and the acceleration resistance model.The influence of the aspect ratio on the resistance term coefficient was analyzed and the range of applicability of the three theories was discussed by calculating the penetration residual velocities of the warhead with different aspect ratios.The results show that the variation of the acceleration resistance term coefficient has a significant influence on the penetration process when the aspect ratio is below 3;when the aspect ratio is above 5,the results of the three models tend to converge,and they are all applicable to engineering calculation.
引文
[1]徐建波,林俊德,唐润棣,等.长杆射弹侵彻混凝土实验研究[J].爆炸与冲击,2002,22(4):174-178.XU J B,LIN J D,TANG R D,et al.The penetration of steel bar projectiles into concrete targets[J].Explosion and Shock Waves,2002,22(4):174-178.
[2]高光发,李永池,刘文平,等.等动能长杆弹侵彻行为的研究及优化设计[J].弹箭与制导学报,2013,33(4):79-82.GAO G F,LI Y C,LIU W P,et al.The study on penetration of constant kinetic energy long-rod penetrator and optimal design[J].Journal of Projectiles,Rockets,Missiles and Guidance,2013,33(4):79-82.
[3]万文乾,龙源,岳小兵,等.弹体长径比影响钢筋混凝土侵彻规律的数值研究[J].弹箭与制导学报,2005,25(2):53-55.WAN W Q,LONG Y,YUE X B,et al.Research on projectiles ratio of length to diameter influencing penetration of steel reinforced concrete by numerical simulation[J].Journal of Projectiles,Rockets,Missiles and Guidance,2005,25(2):53-55.
[4]BERNARD R,HANAGUD S.Large deformation,deep penetration theory for a compressible strain hardening target material[J].AIAA Journal,1971,9(5):905-911.
[5]ROSENBERG Z,DEKEL E.The penetration of rigid long rods[J].International Journal of Impact Engineering,2009,36(4):551-564.
[6]GOODIER J N.On the mechanics of indentation and cratering in the solid targets of strain hardening metal by impact of hard and soft spheres[C]//Proceedings of the 7th Symposium on Hypervelocity Impact(Ⅲ).New York:AIAA,1965:215-259.
[7]王儒策,赵国志.弹丸终点效应[M].北京:北京理工大学出版社,1990:19-36.WANG R C,ZHAO G Z.Projectile terminal effect[M].Beijing:Beijing Institute of Technology Press,1990:19-36.
[8]FORRESTAL M J,FREW D J,HANCKAK S J,et al.Penetration of ground and concrete target with ogive nose projectiles[J].International Journal of Impact Engineering,1996,18(5):465-476.
[9]LI Q M,CHEN X W.Dimensionless formula for penetration depth of concrete target impacted by a non-deformable projectiles[J].International Journal of Impact Engineering,2003,28(1):93-116.
[10]陈小伟.穿甲/侵彻问题的若干工程研究进展[J].力学进展,2009,39(3):316-351.CHEN X W.Advances in the penetration/perforation of rigid projectiles[J].Advances in Mechanics,2009,39(3):316-351.
[11]陈小伟.动能深侵彻弹的力学设计(Ⅰ):侵彻/穿甲理论和弹体壁厚分析[J].爆炸与冲击,2005,25(6):499-505.CHEN X W.Mechanics of structural design of EPW(Ⅰ):the penetration/perforation theory and the analysis on the cartridge of projectile[J].Explosion and Shock Waves,2005,25(6):499-505.
[12]陈小伟,李维,宋成.细长尖头刚性弹对于金属靶的斜侵彻/穿甲分析[J].爆炸与冲击,2005,25(5):393-399.CHEN X W,LI W,SONG C.Oblique penetration/perforation of metallic plates by rigid projectiles with slender bodies and sharp noses[J].Explosion and Shock Waves,2005,25(5):393-399.
[13]郭锦炎,阮文俊,王浩,等.助推弹体对混凝土目标侵彻过程的计算方法研究[J].兵工学报,2012,33(9):1076-1080.GUO J Y,RUAN W J,WANG H,et al.Study on the calculation method of penetration process of projectile with booster into concrete targets[J].Acta Armamentarii,2012,33(9):1076-1080.
[2]高光发,李永池,刘文平,等.等动能长杆弹侵彻行为的研究及优化设计[J].弹箭与制导学报,2013,33(4):79-82.GAO G F,LI Y C,LIU W P,et al.The study on penetration of constant kinetic energy long-rod penetrator and optimal design[J].Journal of Projectiles,Rockets,Missiles and Guidance,2013,33(4):79-82.
[3]万文乾,龙源,岳小兵,等.弹体长径比影响钢筋混凝土侵彻规律的数值研究[J].弹箭与制导学报,2005,25(2):53-55.WAN W Q,LONG Y,YUE X B,et al.Research on projectiles ratio of length to diameter influencing penetration of steel reinforced concrete by numerical simulation[J].Journal of Projectiles,Rockets,Missiles and Guidance,2005,25(2):53-55.
[4]BERNARD R,HANAGUD S.Large deformation,deep penetration theory for a compressible strain hardening target material[J].AIAA Journal,1971,9(5):905-911.
[5]ROSENBERG Z,DEKEL E.The penetration of rigid long rods[J].International Journal of Impact Engineering,2009,36(4):551-564.
[6]GOODIER J N.On the mechanics of indentation and cratering in the solid targets of strain hardening metal by impact of hard and soft spheres[C]//Proceedings of the 7th Symposium on Hypervelocity Impact(Ⅲ).New York:AIAA,1965:215-259.
[7]王儒策,赵国志.弹丸终点效应[M].北京:北京理工大学出版社,1990:19-36.WANG R C,ZHAO G Z.Projectile terminal effect[M].Beijing:Beijing Institute of Technology Press,1990:19-36.
[8]FORRESTAL M J,FREW D J,HANCKAK S J,et al.Penetration of ground and concrete target with ogive nose projectiles[J].International Journal of Impact Engineering,1996,18(5):465-476.
[9]LI Q M,CHEN X W.Dimensionless formula for penetration depth of concrete target impacted by a non-deformable projectiles[J].International Journal of Impact Engineering,2003,28(1):93-116.
[10]陈小伟.穿甲/侵彻问题的若干工程研究进展[J].力学进展,2009,39(3):316-351.CHEN X W.Advances in the penetration/perforation of rigid projectiles[J].Advances in Mechanics,2009,39(3):316-351.
[11]陈小伟.动能深侵彻弹的力学设计(Ⅰ):侵彻/穿甲理论和弹体壁厚分析[J].爆炸与冲击,2005,25(6):499-505.CHEN X W.Mechanics of structural design of EPW(Ⅰ):the penetration/perforation theory and the analysis on the cartridge of projectile[J].Explosion and Shock Waves,2005,25(6):499-505.
[12]陈小伟,李维,宋成.细长尖头刚性弹对于金属靶的斜侵彻/穿甲分析[J].爆炸与冲击,2005,25(5):393-399.CHEN X W,LI W,SONG C.Oblique penetration/perforation of metallic plates by rigid projectiles with slender bodies and sharp noses[J].Explosion and Shock Waves,2005,25(5):393-399.
[13]郭锦炎,阮文俊,王浩,等.助推弹体对混凝土目标侵彻过程的计算方法研究[J].兵工学报,2012,33(9):1076-1080.GUO J Y,RUAN W J,WANG H,et al.Study on the calculation method of penetration process of projectile with booster into concrete targets[J].Acta Armamentarii,2012,33(9):1076-1080.