Abstract：The perforation into a plain concrete panel with ogival and flat nose perforators is numerically simulated with the BPM2D (beam-particle model in two dimensions). The varieties of velocity field in concrete and failure zone surrounding the hole are described. The BPM2D is presented on the basis of the DEM and the FEM. Three types of beam in the BPM2D have been used to form numerical model of concrete. The mechanical properties of every type beam vary with their strain-rate，and are randomly allocated according to Weibull distribution to reflect the initial heterogeneity of concrete at the mesoscale level. The effects of perforators nose shapes on the perforation are discussed with the calculated results. The destruction mode for the ogival nose perforator is a stabbing one，while that for the flat nose perforator is a plugging one. The consumed energy for perforating a uniform target with the flat nose perforator is greater than that with the ogival nose perforator，so that the residual velocity of the former is lower. The comparison of the simulated results with the experimental data shows that the BPM2D is applicable to the simulation of dynamic failure problems for brittle materials.
