Numerical simulation of the effect of underwater explosion on a ship's bow
The phenomenon of underwater explosion has been of great importance in the past
decades, and many researches in this field have been conducted and are being
conducted around the world. The reason for the importance of this issue is the very
destructive effects of underwater explosion on marine structures, which sometimes
will be irreparable. For this reason, the strengthening of marine structures against
underwater explosion is on the agenda of related industries. Among these structures
are vessels that are used in different classes such as recreational, passenger, cargo,
commercial, research and military vessels. Perhaps the effects of the explosion
phenomenon are less important in most vessels, but they become especially
important in naval vessels and military structures. The most important effects of
underwater explosion are caused by sea mines and torpedoes hitting the structure.
For this reason, the importance of considering these effects on the structure
becomes particularly important and forces us to consider this phenomenon in the
design. In this research, the effect of an underwater explosion near the structure,
which is a part of the bow of an aluminum float, has been investigated. Then, by
making changes in the structure and increasing the transverse frame, L, longitudinal
loads and thickness, we examine the structure in three different states. This is
because conducting real tests in this basin is time-consuming, risky, and most
importantly, expensive. To do this, commercial software used in this field is used.
One of the most powerful of these softwares is Abaqus, which uses the finite
element method in explosion simulation. After performing the simulations, we
come to the conclusion that the increase of the transverse frame will have a greater
effect on increasing the strength of the structure compared to the longitudinal load
L and the thickness of the floor. At the end, by mov