Damping of Bomb Blast Wave Due to Impact with the Cracked Earth on the Defense Structure

Nowadays weapons have been made in the world that were not operational at any war and modern countries claim that these weapons are capable of destroying underground structures. Therefore, in regard to this explanation and the need to defend, dynamic designing of underground structures against special bomb blast seems to be indispensable. Wave propagation in stone mass which are inherently inconsistent and have variable behavior and dynamic designing of underground structures that are established in stone mass as well, are very complex. In many studies conducted to wave propagation in stones, the earth has been considered as a homogeneous, similar and completely elastic environment, whereas the earth has an inconsistent nature and its behavior is not compatible with the said conditions at all. In this regard, the study of the real earth behavior against wave propagation seems to be necessary. This paper makes use of UDEC software which is based on component element method and has the ability to dynamically analyze inconsistent stone environments to study loading, wave propagation and damping caused by surface explosion which culminated in desirable results.