弹道学报2017，Vol.29Issue(3)：56-62,81,8.
大质量钨破片冲击多层间隙盖板炸药数值模拟与试验研究
Numerical Simulation and Experimental Study on the Explosive With Multi-layer Interval Targets Impacted by Large-mass Tungsten Fragments
摘要
Abstract
In order to investigate the influence factor of large-mass fragments on shock initiation, the smoothed particle hydrodynamics ( SPH ) and finite element method ( FEM ) was combined, and the influence of different thinckness and different spacing of cover plates on initiation threshold was numerically simulated. The two-stage gas gun was applied, and the experiment of large-mass tungsten fragments impacting explosive was carried out. The critical initiation velocity was obtained. The simulation results are consistent with experimental results, and the SPH/FEM coupling method can be applied to analyze the velocity shock initiation problem. The correlations between critical initiation velocity and oblique impact angle were obtained by data fitting. Results show that the secondary fragments deriving from tungsten fragments have an important effect on the initiation velocity and the initiation delay-time.关键词
爆炸力学/冲击起爆/数值模拟/光滑粒子法/起爆阈值Key words
mechanics of explosion/shock initiation/numerical simulation/smoothed particle hydrodynamics/critical initiation velocity分类
军事科技引用本文复制引用
梁斌,冯高鹏,周婕群,魏雪婷,朱永清..大质量钨破片冲击多层间隙盖板炸药数值模拟与试验研究[J].弹道学报,2017,29(3):56-62,81,8.基金项目
国家自然科学基金项目(11672278) （11672278）
