超高速撞击充气压力容器二次碎片减速运动建模研究

Model for the Deceleration of Secondary Debris Produced by Hypervelocity Impact on Pressure Vessels

针对空间碎片超高速撞击充气压力容器的二次碎片减速运动问题,首先根据弹丸撞击容器前壁后的破碎程度,将二次碎片分为弹丸未破碎、未完全破碎及完全破碎3种模式,分别建立了二次碎片未受气体扰动时的初始模型;然后采用理论分析手段,应用流体动力学、气-固两相流理论,对弹丸不同破碎模式下的二次碎片在容器内的运动过程进行分析,建立了二次碎片减速运动的计算模型,通过与数值模拟结果的比较,验证了计算模型的有效性。

According to characteristic of secondary debris,initial models of secondary debris are built.The models of secondary debris are classified as three patterns.The first patten is that the projectile is not fragmentated.The second patten is that the projectile is not entirely fragmentated.The third patten is that the projectile is entirely fragmentated.The secondary debris deceleration process is analyzed based on hydrodynamics theory and gas-solid two phase flow theory.The computational model of secondary debris deceleration is built.The computational results are consistent with numerical results very well.The model of secondary debris deceleration is validated.