非均质固体炸药冲击起爆的物质点法  

The material point method for shock-to-detonation transition of heterogeneous solid explosive

作　　者：张忠[1] 陈卫东[1] 杨文淼[1] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《爆炸与冲击》2011年第1期25-30,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10772055)~~

摘　　要：将点火增长方程引入到物质点法中,编制了相应的计算程序MPM-SDT,并求解了冲击起爆问题。通过与传统算法和实验结果的比较,验证了物质点法应用于冲击起爆问题的可行性。物质点法避免了La-grange法的网格畸变缠结和Euler法的对流误差。最后,对钨、铜、钢等材料破片撞击屏蔽炸药问题进行了多组数值模拟。3种材料对屏蔽炸药的引爆性能,钨最优,铜次之,钢最差;破片临界冲击起爆速度与屏蔽板厚度近似呈线性关系。With the ignition and growth model,the material point method（MPM） computer code called MPM-SDT was developed in FORTRAN 90,and was used to compute shock-to-detonation transition problems.The results obtained by MPM,traditional algorithms and experiment were compared.The feasibility of using the material point method to solve shock-to-detonation transition problems was confirmed.MPM avoids the mesh distortion and tangling issues associated with Lagrangian methods and the advection errors associated with Eulerian methods.Fragments of different material（steel,copper,tungsten,etc.） impacting shielded explosive were simulated.The initiation behaviour of tungsten is the best,copper is the second,and steel is the worst.The critical detonating velocity is proportional to the thickness of shield.

关 键 词：爆炸力学 冲击起爆 物质点法 点火增长方程 

分 类 号：O381[理学—流体力学]