弹体高速侵彻岩石靶体深度计算
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摘要
为研究弹体高速侵彻岩石靶体的侵彻机制转化规律,利用二级轻气炮开展了着靶速度1 100～1 780 m/s的模型试验,得到了弹体的质量损失规律,以及侵彻深度与侵彻速度之间的关系。试验结果表明,弹体对岩石类靶体的侵彻机制随撞击速度的增加会发生转化,由刚体侵彻转变为半流体侵彻,进入半流体侵彻阶段后弹体侵彻深度随撞击速度的增加急剧减小。基于提出的弹体质量理论模型结合BLZ公式的侵彻阻抗推导出考虑质量损失的弹体高速侵彻深度计算公式。将2个阶段的理论计算结果与侵彻试验数据进行了对比验证,侵彻深度和弹体质量变化规律均吻合较好,能够反映出侵彻机制的变化规律。
In order to study the penetration mechanism transformation rule of high-velocity projectiles into rock targets,the model experiments of penetration with impact velocity 1100 ～ 1780 m/s are carried out by using two-stage light-gas gun,obtaining the mass loss laws of projectiles and the relationship between penetration depth and velocity. The results show that the penetration mechanism changes from rigid penetration to semi-liquid penetration with the increase of impact velocity,and the penetration depth decreases sharply with the impact velocity increases in semi-liquid penetration stage. Based on the proposed theoretical model of projectile mass and penetration resistance of BLZ formula,the computational method for penetration depth of high-velocity projectiles with mass loss is derived. The theoretical calculation results of the two stages are compared with the penetration experimental data to verify that the penetration depth and the mass change law of projectile are in good agreement,which could reflect the change law of penetration mechanism.
In order to study the penetration mechanism transformation rule of high-velocity projectiles into rock targets,the model experiments of penetration with impact velocity 1100 ～ 1780 m/s are carried out by using two-stage light-gas gun,obtaining the mass loss laws of projectiles and the relationship between penetration depth and velocity. The results show that the penetration mechanism changes from rigid penetration to semi-liquid penetration with the increase of impact velocity,and the penetration depth decreases sharply with the impact velocity increases in semi-liquid penetration stage. Based on the proposed theoretical model of projectile mass and penetration resistance of BLZ formula,the computational method for penetration depth of high-velocity projectiles with mass loss is derived. The theoretical calculation results of the two stages are compared with the penetration experimental data to verify that the penetration depth and the mass change law of projectile are in good agreement,which could reflect the change law of penetration mechanism.
引文
[1]王明洋,邱艳宇,李杰,等.超高速长杆弹对岩石侵彻、地冲击效应理论与实验研究[J].岩石力学与工程学报,2018,37(3):564-572.
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[5]张德志,张向荣,林俊德.高强钢弹对花岗岩正侵彻的实验研究[J].岩石力学与工程学报,2005,24(9):1612-1618.
[6]宋春明,李干,王明洋,等.不同速度段弹体侵彻岩石靶体的理论分析[J].爆炸与冲击,2018,38(2):250-257.
[7]徐晨阳,张先锋,刘闯,等.大着速范围长杆弹侵彻深度变化及其影响因素的数值模拟[J].高压物理学报,2018,32(2):33-42.
[8]徐晨阳,弹体高速侵彻典型岩石靶体作用过程研究[D].南京:南京理工大学,2018.
[9]李艳,范文,赵均海,等.中低速长杆弹侵彻半无限靶的动态响应研究[J].工程力学,2017,34(9):139-149.
[10]曹扬悦也,蒋志刚,谭清华,等.基于Hoek-Brown准则的混凝土-岩石类靶侵彻模型[J].振动与冲击,2017,36(5):48-53.
[11] Rosenberg Z,Dekel E. Numerical study of the transition from rigid to eroding-rod penetration[J]. Journal De Physique IV,2003,110(9):681-686.
[2] Chen X W,Li Q M. Transition from nondeformable projectile penetration to semihydrodynamic penetration[J].Journal of Engineering Mechanics,2004,130(1):123-127.
[3]邓国强,杨秀敏.超高速武器对地打击效应数值仿真[J].科技导报,2015,33(16):65-71.
[4]沈俊,徐翔云,何翔,等.弹体高速侵彻岩石效应试验研究[J].岩石力学与工程学报,2010,29(增刊2):4207-4212.
[5]张德志,张向荣,林俊德.高强钢弹对花岗岩正侵彻的实验研究[J].岩石力学与工程学报,2005,24(9):1612-1618.
[6]宋春明,李干,王明洋,等.不同速度段弹体侵彻岩石靶体的理论分析[J].爆炸与冲击,2018,38(2):250-257.
[7]徐晨阳,张先锋,刘闯,等.大着速范围长杆弹侵彻深度变化及其影响因素的数值模拟[J].高压物理学报,2018,32(2):33-42.
[8]徐晨阳,弹体高速侵彻典型岩石靶体作用过程研究[D].南京:南京理工大学,2018.
[9]李艳,范文,赵均海,等.中低速长杆弹侵彻半无限靶的动态响应研究[J].工程力学,2017,34(9):139-149.
[10]曹扬悦也,蒋志刚,谭清华,等.基于Hoek-Brown准则的混凝土-岩石类靶侵彻模型[J].振动与冲击,2017,36(5):48-53.
[11] Rosenberg Z,Dekel E. Numerical study of the transition from rigid to eroding-rod penetration[J]. Journal De Physique IV,2003,110(9):681-686.