SPH-FEM接触算法在冲击动力学数值计算中的应用

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...

APPLICATION OF SPH-FEM CONTACT ALGORITHM IN IMPACT DYNAMICS SIMULATION

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.