UNDERWATER EXPLOSION OF STEEL PLATE: A NUMERICAL SIMULATION ANALYSIS VALIDATION STUDY

Abstract

This research presents the development and validation of a numerical simulation analysis program aimed at predicting the deformation of square steel plates subjected to underwater explosions. Utilizing the LS-PREPOST and LS-DYNA software packages, a comprehensive numerical model is constructed to simulate the complex interactions between explosive forces, hydrodynamic effects, and structural response in an underwater environment. The Arbitrary Lagrangian Eulerian (ALE) methodology was used for this research since it has the tools to best simulate the phase changing behaviour of air and explosive and their interactions with the surroundings. The ALE method was employed to model the dynamics of seawater, explosive charges, and air-backed target plates in three-dimensional space. The simulation program was rigorously validated against published experimental data, ensuring its reliability and accuracy in predicting plate deformations. By refining simulation parameters and methodologies, the program demonstrates its capability to accurately simulate blast-related phenomena and provides valuable insights into the behaviour of steel plates under underwater explosion conditions. This research contributes a valuable tool for engineers and researchers to assess blast loading effects on marine structures, informing the design and mitigation strategies for enhanced safety and resilience in maritime environments.