Journal of Korean Society of Disaster and Security ISSN:2466-1147(Print) 2508-285X(Online) 한국방재안전학회 논문집

This study analyzed the generation and propagation characteristics of tsunamis induced by underwater explosions using numerical simulation, aiming to provide fundamental data for assessing potential damage to maritime structures. A two-phase analysis was performed using the Coupled Eulerian-Lagrangian (CEL) technique in ABAQUS. In Phase 1, the water column size (height H0 and equivalent width W0) was quantified based on explosion depth for a 10 kton TNT equivalent explosion, confirming that the water column height increased with depth. Phase 2 modeled tsunami propagation using the dam-break principle and derived a regression equation to predict the maximum coastal wave height based on the initial water column dimensions. The simulation results predicted a maximum wave height of up to 32 m and an average flow velocity of 30 m/s at the coast. This quantitative data provides essential information for disaster preparedness and damage assessment of key maritime structures such as cable-stayed bridges.