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

Resumo

Results of modeling the 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 flat substrate are reported. Problems of the action of such a wave on objects rigidly fixed on the substrate (a 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 ANSYS commercial software package. These numerical predictions are compared with experimental data on the static pressure measured by sensors mounted on the prism walls. It is demonstrated that an adequate description of the unsteady flow pattern formed around the obstacles mounted on the substrate can be provided. Based on these numerical data, the intensity of the shock wave action on various objects is estimated.