In this tutorial, the simulation of a CEL underwater explosion near an aluminum hull caused by three sea mines has been performed in Abaqus. The fluid domain is modeled as a 3D Eulerian part, the aluminum hull as a 3D shell part, and water and TNT charges as 3D solid parts. Underwater explosions involve complex fluid–structure interactions, where the shock wave delivers most of the initial structural damage.

To simulate the hull response under high-rate loading, the Johnson-Cook plasticity and damage model is used—suitable for metals undergoing rapid deformation. The TNT is modeled using the Jones-Wilkins-Lee (JWL) equation of state in a programmed burn setup. The Us–Up equation of state is applied to define water behavior.

A dynamic explicit step is used to capture transient effects. General contact is applied, and non-reflecting Eulerian boundaries are defined to avoid wave reflections. A refined mesh ensures accuracy. Results such as stress, strain, damage, pressure waves, and deformation fields can be extracted after the simulation.