摘要
以一种等径身管发射装置-气体炮为背景,根据其工作原理和结构特点,在考虑弹丸和身管的间隙存在漏气的条件下,建立气体炮的内弹道方程。在Autodyn中建立气体炮的仿真模型,将仿真模型计算得到的结果与理论模型结果进行对比,证明了仿真模型的正确性。对不同弹管间隙的仿真模型和理论模型进行计算,结果表明随着弹管间隙的增大,气体泄漏量逐渐增大,弹丸炮口初速逐渐减小。通过Autodyn分别对使用锥面闭气环和带尾裙闭气环两种条件下的发射装置进行仿真计算,将得到的弹丸速度与不使用闭气环的弹丸速度进行对比,结果表明使用闭气环的弹丸速度明显大于不使用闭气环的弹丸速度。分别在两种闭气环上施加多个观测点,通过观测点记录两种闭气环在受到高压气体、身管和弹丸共同作用下的径向位移及压力,研究闭气环的闭气机理,并对两种闭气环的闭气效果的差异进行分析,分析结果表明带尾裙闭气环的闭气效果更佳。
Based on the background of a kind of uniform-diameter barrel gas gun and considering its working principles and structural characteristics,the internal ballistic equations of the gas gun were established,taking into account gas leakage through the gap of projectile and barrel.A simulation model of the gas gun was developed in Autodyn.The correctness of the simulation model was verified by comparing the calculated results of the simulation model with those of the theoretical model.Computations were conducted on both simulation model and theoretical model with different gaps between projectile and barrel.The results show that with the increase of gap size,the gas leakage rises gradually,and the muzzle velocity of projectile shows a corresponding gradual decrease.The launching device under the two conditions of using conical obturator ring and tail skirt obturator ring was simulated and calculated respectively through Autodyn.The obtained projectile velocities were compared with the projectile velocity without an obturator ring.The results show that the projectile velocities using obturator ring are obviously higher than those without an obturator ring.Multiple monitoring points were applied to the two kinds of obturator rings.The radial displacement and pressure of the two kinds of obturator rings under the coupled effects of high-pressure gas,barrel and projectile constraints were recorded by the monitoring points.The mechanism of the obturator ring was studied,and the difference of the sealing effect of the two kinds of obturator rings was analyzed.Analytical results revealed that the tail-skirted obturator ring exhibits superior sealing effectiveness compared to its conical counterpart.
作者
赵金玉
黄勇
王浩
陈常顺
ZHAO Jinyu;HUANG Yong;WANG Hao;CHEN Changshun(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《弹道学报》
北大核心
2025年第2期112-121,共10页
Journal of Ballistics
