摘要
为了充分发挥光滑粒子流体动力学方法(Smoothed Particle Hydrodynamics,SPH)易于处理大变形以及有限元(Finite Element Method,FEM)计算精度和效率高的优势,论文基于无网格粒子接触算法,在有限元节点处设置背景粒子,通过接触力的方式计算SPH粒子和有限单元之间的接触问题.使用SPH-FEM接触算法分别对球头钢弹斜冲击钢板和平头钢弹正冲击钢板的情况进行了三维数值计算,SPH采用完全变光滑长度算法,FEM采用矩阵向量积的EBE(Element-By-Element)算法.将SPH-FEM接触算法的计算结果与LS-DYNA的计算结果以及实验结果进行了对比验证.
Coupling of Smoothed Particle Hydrodynamics（SPH） and Finite Element Method（FEM） can make full use of the superiority of SPH in dealing with large deformation and the high accuracy and efficiency of FEM.This paper calculates the contact between SPH particles and finite elements using meshless particle contact method,and background particles are assigned in the position of FE nodes.The oblique impact between spheral-nosed projectile and steel target and the normal impact between blunt-nosed projectile and steel target are calculated using the SPH-FEM contact algorithm.The fully variable smoothing lengths algorithm is used in SPH and the EBE algorithm is used in FEM.The numerical results of LS-DYNA and the experimental observations validate the accuracy of the SPH-FEM contact algorithm.
出处
《固体力学学报》
CAS
CSCD
北大核心
2011年第3期319-324,共6页
Chinese Journal of Solid Mechanics
基金
国家973计划项目(61338)
国家教育部NCET基金项目
第二炮兵工程学院创新性探索研究项目(KX2008172)资助
关键词
光滑粒子流体动力学方法
有限元方法
接触
冲击
背景粒子
smoothed particle hydrodynamics
finite element method
contact
impact
background particle
