JEMS Maritime Sci. 2023; 11(2): 79-85 | DOI: 10.4274/jems.2023.82713

Simulation of Shockwave Effects on a Ship-like Structure due to Underwater Explosions

Alpaslan Tatlýsuluoðlu¹, Serdar Beji^2
1Exercise Brunch Head, OF-5 Allied Maritime Command (MARCOM) Northwood, United Kingdom
²Ýstanbul Technical University Faculty of Naval Architecture and Ocean Engineering, Ýstanbul, Türkiye

Underwater explosions that threaten the hull integrity and proper operation of navy ships’ systems and subsystems are considered from
the viewpoint of damage estimation. The commercial code LS-DYNA with the Arbitrary Lagrangian-Eulerian numerical technique is used
to analyze the shock effects on structural components of a ship-like form for three different scenarios. Computed maximum permanent
deformations are matched with the corresponding keel shock factor (KSF) values for searching a functional relationship of a linear form.
Although observed for limited simulations and therefore should be viewed with caution, the linear dependency of the maximum permanent
deformations on the KSF values implies that the KSF may be a simple indicator for estimating the extent of damage due to underwater
blasts.

Keywords: Underwater explosion, High-pressure shock waves, Ship-hull damage simulations, Keel shock factor

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