Abstract
Underwater explosion is a subject that has been paid attention to by many researchers. In this study the underwater explosion phenomena under shockwave loading is explored by numerical method. For this purpose, by modeling a marine pipe buried in the water by ABAQUS software, the effect of the shock wave and the damages were assessed. Then using the laboratorial results, the fluid-structure interaction and shock wave loading and its results were analysed. Finally, it was concluded from numerical modeling that the highest levels of strain on the pipe buried in the water under underwater explosion and shock wave loading occur in the ending parts of the pipe in both sides and away from explosion field.
Highlights
Underwater explosion which is abbreviated as UNDEX is a subject that has been continuously paid attention by researchers and is about 151 years old
Fluid-Structure Interaction and Shock Wave Loading The comparable results for structure response and reaction can be obtained when the boundaries based on the source are placed at half of the distance from the structure
In this study the numerical simulation of underwater explosion for pipes submerged under loadings of shock wave was analysed
Summary
Underwater explosion which is abbreviated as UNDEX is a subject that has been continuously paid attention by researchers and is about 151 years old. Analysis of underwater explosion is one of the very important, new and complex issues and is among the main design considerations for sea structures such as platforms. The endurance and control of these structures against shock waves of explosion, accurate loading mechanism and obtaining a comprehensive method for the response of these structures against these types of loads is the current subject of many research centers in the world and the subject of this paper. Underwater explosion includes two main phenomena namely shock wave and air bubbles; and dynamic loading on the structure is the results of these. Depending on the conditions including the type and the amount of the explosive material and its distance to structure and water surface, the initial pulse (shock wave) can result in a major part or a fraction of the structure response. The pipe and the surrounding fluid with non-reflective boundaries are subject to explosion of a certain amount of an explosive material and the analysis is done involving and taking into consideration the effects of structure and fluid interaction
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