基于无网格Galerkin法的穿甲侵彻数值模拟  

Simulation investigation on perforation and penetration based on EFG method

作　　者：龚曙光[1] 饶刚[1] 伍贤洪[1] 

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105

出　　处：《爆炸与冲击》2011年第6期658-663,共6页Explosion and Shock Waves

基　　金：国家自然科学基金面上项目(50875223)~~

摘　　要：将无网格Galerkin法与LS-DYNA软件相结合,建立了穿甲侵彻的分析模型,对三维球形弹体侵彻双层无限大钢靶板进行了数值模拟,解决了该过程中出现的负体积现象,并将结果与空穴膨胀理论和有限元法进行了对比,所得结果证实了无网格Galerkin法在模拟穿甲侵彻时的可行性与优越性。By integrating the element-free Galerkin （EFG） method with the LS-DYNA software, an analysis model for perforation and penetration was developed to numerically simulate the penetration of a spherical-nose projectile into a semi-infinite steel target in three dimensions. The simulated results were compared with the ones by the cavity expansion theory and the finite element method. The comparison demonstrates the feasibility and superiority of the EFG method in the simulation of perforation and penetration.

关 键 词：爆炸力学 穿甲过程 无网格GALERKIN法 穿甲侵彻 空穴膨胀理论 LS-DYNA 

分 类 号：O385[理学—流体力学]