弹裙结构参数对挤压阻力的影响研究
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摘要
为研究射弹弹裙结构参数对挤压阻力的影响,建立了锥膛炮的身管及射弹耦合模型。分析了弹裙受到的阻力及弹后空间变化的火药气体压力分布情况,将此作为力载荷作用于模型。塑性材料选用广泛采用的Johnson-Cook本构模型,采用有限元软件ABAQUS的动态显式算法进行求解,将仿真结果与内弹道编程计算出的位移、速度结果进行对比,验证了仿真模型的正确性。探究了不同弹裙锥角、不同弹裙尾部宽度和两者同时变化对挤压变形阻力的影响。结果表明,不同弹裙结构参数对挤压阻力有较大影响,最大挤压阻力与弹裙总长有关。
The coupling models of tapered-bore gun tube and projectile were set up to study the influence of the structural parameters of the projectile skirts on the pressing resistance. An analysis was made of the resistance of the projectile skirts and the pressure distribution of gunpowder gas owing to the space change after the projectile was launched. And this was regarded as the force load acting on the model. The broadly adopted Johnson-Cook constitutive model was chosen for the plastic materials.The dynamics display algorithm of software ABAQUS was used to solve the problem. A comparison was made of the simulation results,the results of displacement and velocity calculated through the internal ballistic programming,which verified the correctness of the simulation model. A study was made of the influence of different taper angles and different tail width of the projectile skirts as well as both simultaneous changes on the pressing resistance. The results show that different structural parameters of the projectile skirts have a great influence on the pressing resistance,and that maximum pressing resistance is related to the total length of projectile skirts.
The coupling models of tapered-bore gun tube and projectile were set up to study the influence of the structural parameters of the projectile skirts on the pressing resistance. An analysis was made of the resistance of the projectile skirts and the pressure distribution of gunpowder gas owing to the space change after the projectile was launched. And this was regarded as the force load acting on the model. The broadly adopted Johnson-Cook constitutive model was chosen for the plastic materials.The dynamics display algorithm of software ABAQUS was used to solve the problem. A comparison was made of the simulation results,the results of displacement and velocity calculated through the internal ballistic programming,which verified the correctness of the simulation model. A study was made of the influence of different taper angles and different tail width of the projectile skirts as well as both simultaneous changes on the pressing resistance. The results show that different structural parameters of the projectile skirts have a great influence on the pressing resistance,and that maximum pressing resistance is related to the total length of projectile skirts.
引文
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[3]安俊斌,李强,李世康,等.某大口径枪械弹丸挤进坡膛过程的仿真分析[J].火炮发射与控制,2017,38(1):17-21.AN Junbin,LI Qiang,LI Shikang,et al.Simulation analysis of projectile engraving process of the large-caliber firearm[J].Journal of Gun Launch&Control,2017,38(1):17-21.(in Chinese)
[4]孙河洋,马吉胜,李伟,等.坡膛结构变化对弹带挤进过程影响的研究[J].振动与冲击,2011,30(3):30-33.SUN Heyang,MA Jisheng,LI Wei,et al.Influence of different bore structures on engraving process on projectile[J].Journal of Vibration and Shock,2011,30(3):30-33.(in Chinese)
[5]马明迪,崔万善,曾志银,等.大口径火炮弹丸挤进过程坡膛动力响应分析[J].中北大学学报:自然科学版,2017,35(3):264-270.MA Mingdi,CUI Wanshan,ZENG Zhiyin,et al.Dynamic response analysis of chamber throat in the engraving process of heavy caliber gun projectile[J].Journal of North University of China:Natural Science Edition,2017,35(3):264-270.(in Chinese)
[6]魏平,侯健,陈汀峰.基于锥膛炮的弹丸弹裙膛内阻力研究[J].兵工学报,2012,33(3):324-328.WEI Ping,HOU Jian,CHEN Tingfeng.Research on the bore resistance projectile sabots based on conic-chamber gun[J].Acta Armamentarii,2012,33(3):324-328.(in Chinese)
[7]金志明.枪炮内弹道学[M].北京:北京理工大学出版社,2004:78-80.JIN Zhiming.Interior ballistics of guns[M].Beijing:Beijing Institute of Technology Press,2004:78-80.(in Chinese)
[8]JOHNSON G R,COOK W H.A constitutive model and data for metal subjected to large strains,high strain rates and high temperature[C]∥Proceedings of the 7th International Symposium on Ballistics.Hague:IBC,1983:541-547.
[9]JOHNSON G R,COOK W H.Fracture characteristics of three matals subjected to various strains,strain rates,temperatures and pressures[J].Engineering Fracture Mechanics,1985(21):31-48.
[10]冷冰林,许金余,邵宁,等.刚性弹丸侵彻金属靶体的FEM-SPH耦合计算[J].弹箭与制导学报,2008,28(5):105-108.LENG Binglin,XU Jinyu,SHAO Ning,et al.Computation of steel penetrated by rigid projectile with coupled FEM-SPH methods[J].Journal of Projectiles,Rockets,Missiles and Guidance,2008,28(5):105-108.(in Chinese)
[11]林莉,支旭东,范锋,等.Q235B钢Johnson-Cook模型参数的确定[J].振动与冲击,2014,33(9):153-158.LIN Li,ZHI Xudong,FAN Feng,et al.Determination of parameters of Johnson-Cook models of Q235B steel[J].Journal of Vibration and Shock,2014,33(9):153-158.(in Chinese)