A Numerical Modelling For Underwater Explosion With Meshless Smooth Particle HydrodynamicsMethod

An accurate and safer analysis for structure is possible if we can identify factors in the analysis more accurately.  One of the important factors in the analysis is the identification the kind and intensity of structural loading. Among the types of loading, especially dynamic loads and impact loads resulting from the explosion, is far more complicated and difficult to determine. According to lab explosion modeling problems, using numerical modeling to analyze these phenomena can be reasonable. Uses grid methods like Finite element method caused a numerical error due to intense deformation and high velocity of blast. In this paper, underwater explosion was modeled and programmed with numerical mesh-less method, Smooth Particle Hydrodynamics (SPH), using Fortran programming language and explosion pressure and water level changes in the blast were studied. Finally the solving problem is compared with empirical relation. The results of this model are very similar to empirical relationship. This program can be used for underwater explosions modeling and the results can be used to determine pressures and impacts on marine structures.