Abstract:

The process of formation and penetration of the shaped charge involves such complex physical phenomena as the extreme plastic deformation of metal liner subjected to shock wave，the formation of jet and the evolution of the multi-material interface.The Eulerian algorithm adopts a fixed mesh to describe the material motion，which avoids the mesh distortion problem in the Lagrange method and is especially suitable for dealing with large deformation problem.The Eulerian numerical method is used to numerically simulate the process of shaped charge formation and penetration.A non-uniform memory access （NUMA） parallel architecture is built with the parallelization of Eulerian method.The data exchange between different nodes is made by using a message passing interface （MPI）.A shared memory window RMA is created on the root node，which effectively reduces the communication consumption between the nodes and improves the computational efficiency of the formation of shaped charge.Based on pMMIC3D program，the finite difference numerical method is used for numerical solution to simulate the process of shaped charge forming and penetrating a target plate，which verifies the feasibility of Eulerian numerical algorithm and parallel strategy.The proposed parallel strategy，is compared with the parallel method of the UMA coherent memory access architecture.The results show that the proposed parallel method has the shortest computing time，which further verifies the high efficiency of the parallel method.The effect of the cone angle of liner on the formation of shaped charge is analyzed by visualizing the simulated results and comparing the data with the depth of penetrating into the metal target plate.

Key words: shaped charge formation formation, Eulerian method, non-uniform memory access, message passing interface