Assessment of dynamical behavior of marine elements affected by waves due to underwater explosion

In this article , in order to design and amplification of elements versus underwater explosion and studying of this phenomenon, the analysis of the influence of load quantity on collenchyma elements changing and effect of detonation front ABAQUS software aided has been inspected and numerical results has been obtained.In order to verification of data, an experimental sample along underwater explosion has been used and acceptable results have been obtained. In this article five structures including: vespine – squared,diagonal,hexagoncircular and discrete have been modeled and monitored in order to perform assessment of dynamical behavior affected by underwater explosion, frank dynamical inspection aided in ABAQUS software. Elementary load in explosion time is 40 KG PNT that is blasted away 3 meters from element frontal surface and underwater. Through latter stages in order to perform assessment of explosion effects on element behavior, interspace between load and element is changed to 5 meters. Element with 62 KG TNT was inspected in order to determine load quantity effects due to explosion on quay behavior. in this article thirty models using mentioned software which are able to have admeasurement of underwater explosion conditions were modeled and energy absorption history, geometric transformation, element bows counter and Misses tensions counters was exploited in order to determine this element behavioral action level through two phases reactions. According to results , collenchyma elements of discrete structure has maximum kinetic energy at 620 KNM so that mentioned energy has been decreased through squared , circle , hexagon and diagonal samples at 19% , 9% , 9% and 5% respectively .

Keywords:

nautical quays , dynamical behavior , explosion , collenchyma and sandwich elements , ABAQUS