身管温度对于小口径弹头准静态挤进过程的影响
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摘要
设计了加热挤进实验系统,在20~120℃进行了热身管准静态挤进实验,得到了不同温度下的挤进阻力曲线。采用Hypermesh和Abaqus联合建模,结合多种材料损伤失效模型模拟了连发射击时不同身管温度下的挤进过程,得到弹头挤进阻力的变化规律,发现轴向摩擦阻力为挤进阻力的主要成分,导转力(侧轴向分力)随身管温度升高占比随之下降。实验验证了热身管有限元模型的准确性,为枪弹设计理论中起始弹道的研究提供理论参考。
The engraving process has an important effect on the firing accuracy of small-caliber bullets. In this paper,the effects of barrel temperature on this process of small-caliber bullet were studied by experimental and numerical simulation on Quasi-static. The hot extrusion test was carried out at 20 ~ 120℃,and the engraving resistance curves were obtained at different temperatures of barrel. Using Hypermesh and Abaqus joint modeling,combined with a variety of material damage failure model to simulate the bursts of firing,the trend of the engraving resistance is obtained at 20 ~ 170 ℃ respectively.It is found that the axial frictional resistance is the main component of the engraving resistance,and the proportion of the axial force of the guide side decreases with the increase of the temperature of the barrel.The experimental results verify the accuracy of the finite element model of the heat barrel,and provide the theoretical reference for the research of the starting trajectory in the design theory of the bullet.
The engraving process has an important effect on the firing accuracy of small-caliber bullets. In this paper,the effects of barrel temperature on this process of small-caliber bullet were studied by experimental and numerical simulation on Quasi-static. The hot extrusion test was carried out at 20 ~ 120℃,and the engraving resistance curves were obtained at different temperatures of barrel. Using Hypermesh and Abaqus joint modeling,combined with a variety of material damage failure model to simulate the bursts of firing,the trend of the engraving resistance is obtained at 20 ~ 170 ℃ respectively.It is found that the axial frictional resistance is the main component of the engraving resistance,and the proportion of the axial force of the guide side decreases with the increase of the temperature of the barrel.The experimental results verify the accuracy of the finite element model of the heat barrel,and provide the theoretical reference for the research of the starting trajectory in the design theory of the bullet.
引文
[1]李宣荣,胡桂梅.弹丸挤进过程研究的概况[J].科技创新导报,2013(15):89-90.
[2]WU B,ZHENG J,TIAN Q,et al.Friction and wear between rotating band and gun barrel during engraving process[J].Wear,2014,318(1):106-113.
[3]刘国庆,徐诚.狙击步枪弹准静态弹头挤进力研究[J].兵工学报,2014,35(10):1528-1535.
[4]陆野,周克栋,赫雷,等.坡膛结构参数对枪械内弹道挤进时期的影响研究[J].兵工学报,2015,36(7):1363-1369.
[5]许耀峰,丁宏民,徐坚,等.大口径火炮膛线结构对滑动弹带弹丸膛内运动影响的数值分析[J].兵工学报,2016,37(11):2148-2156.
[6]李淼,钱林方,孙河洋.某大口径火炮弹带热力耦合挤进动力学数值模拟研究[J].兵工学报,2016,37(10):1803-1811.
[7]樊黎霞,何湘玥,弹丸挤进过程的有限元模拟与分析[J].兵工学报,2011(8):963-969.
[8]DING C,LIU N,ZHANG X.A mesh generation method for worn gun barrel and its application in projectile-barrel interaction analysis[J].Finite Elements in Analysis&Design,2017,124:22-32.
[9]Abaqus/Explicit,Analysis User’s Manual[M].Volume 24:Progressive Damage and Failure.2014.
[10]HILLERBORG A,MODEER M,PETERSSON P E.Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements[J].Cement and Concrete,1976(6):773-782.
[2]WU B,ZHENG J,TIAN Q,et al.Friction and wear between rotating band and gun barrel during engraving process[J].Wear,2014,318(1):106-113.
[3]刘国庆,徐诚.狙击步枪弹准静态弹头挤进力研究[J].兵工学报,2014,35(10):1528-1535.
[4]陆野,周克栋,赫雷,等.坡膛结构参数对枪械内弹道挤进时期的影响研究[J].兵工学报,2015,36(7):1363-1369.
[5]许耀峰,丁宏民,徐坚,等.大口径火炮膛线结构对滑动弹带弹丸膛内运动影响的数值分析[J].兵工学报,2016,37(11):2148-2156.
[6]李淼,钱林方,孙河洋.某大口径火炮弹带热力耦合挤进动力学数值模拟研究[J].兵工学报,2016,37(10):1803-1811.
[7]樊黎霞,何湘玥,弹丸挤进过程的有限元模拟与分析[J].兵工学报,2011(8):963-969.
[8]DING C,LIU N,ZHANG X.A mesh generation method for worn gun barrel and its application in projectile-barrel interaction analysis[J].Finite Elements in Analysis&Design,2017,124:22-32.
[9]Abaqus/Explicit,Analysis User’s Manual[M].Volume 24:Progressive Damage and Failure.2014.
[10]HILLERBORG A,MODEER M,PETERSSON P E.Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements[J].Cement and Concrete,1976(6):773-782.