Numerical Modeling and Simulation-Based Assessment of Underwater Explosion Effects Near an Offshore Oil and Gas Extraction Platform

In the context of increasing security threats in the Black Sea region due to naval mine deployment, this study investigates the potential impact of underwater explosions on offshore oil and gas platforms. Using numerical simulations in ANSYS, the research analyzes the structural response of an offshore platform subjected to a detonation from a drifting YaM-type naval mine. The study begins with a two-dimensional simulation to validate peak pressure values and shock wave propagation, followed by a three-dimensional model of a four-legged platform under explosive loading conditions. Results show a deformation depth of approximately 26 cm in the impacted leg and a longitudinal displacement of 3.63 mm. Passive protection solutions, such as deploying nets around offshore platforms, are discussed as potential methods to mitigate shock wave effects by increasing the standoff distance. The findings highlight the vulnerability of critical maritime infrastructure and emphasize the importance of developing effective risk mitigation strategies to counteract threats posed by drifting naval mines. This research contributes to improving the resilience of offshore structures and lays the groundwork for future experimental studies on underwater blast effects and protective system design.