非线性侵彻动力过程的再生核质点法  

An improved reproducing kernel particle method for nonlinear dynamical penetration process

作　　者：赵光明[1] 宋顺成[2] 

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 [2]西南交通大学力学与工程学院,四川成都610031

出　　处：《爆炸与冲击》2010年第4期355-360,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(50804003);教育部新世纪优秀人才支持计划项目;安徽省优秀青年科技基金项目(08040106831);高校省级自然科学研究项目(KJ2008A125)~~

摘　　要：通过在再生核质点法中引入Johnson-Cook本构方程及损伤模型,并利用新型的滑移面算法及配点法解决再生核质点法中的接触面和质点滑移问题,方便实现边界条件和计算过程中质点速度调整。通过侵彻过程再生核质点法研究,实现了弹丸侵彻靶板过程的模拟分析,避免了有限元法中单元严重变形和破坏过程的网格重构困难,提高了分析精度和计算速度,可方便模拟侵彻的大变形和高应变率现象。The Johnson-Cook constitutive relations and damage model were introduced into the reproducing kernel particle （RKP） method, and a new interface calculation method and a collocation method were proposed to solve the problems of interface and gliding particles, realize the boundary conditions and adjust the particle velocity in the computational process. The improved RKP method was applied to numerically analyze the oblique penetration process of a steel cylindrical pellet into a fixed steel plate. In the computation, the pellet and target plate were divided into kernel particles other than elements. Computational results show that the improved RKP method can avoid the finite element deformation in the finite element method and the element reconstruction in the damage process and enhance analysis accuracy and computational speed. And the improved RKP method can be used to conveniently analyze the large deformation and high strain rate phenomena in penetration process.

关 键 词：爆炸力学 侵彻 再生核质点法 高速冲击 非线性 

分 类 号：O385[理学—流体力学]