Mathematical modeling of propagation of explosion waves and their effect on various objects

Results of modeling propagation of a shock wave formed by an explosion of a spherical charge of a high explosive in a semi-infinite space bounded by a plane substrate are reported. Problems of the action of such a wave on objects rigidly fixed on the substrate (single prism and a set of prisms simulating an urban area) are considered. The computations are performed in a three-dimensional inviscid formulation with the use of the AUTODYN module of the commercial software package ANSYS. These numerical predictions are compared with experimental data on the static pressure in sensors mounted on the prism walls. A possibility of providing an adequate description of the unsteady flow pattern formed around the obstacles mounted on the substrate is demonstrated. Based on these numerical data, the intensity of the shock wave action on various objects is estimated.