Introduction to Underwater and Underground Explosion Phenomena in Abaqus

Abaqus is a robust finite element analysis (FEA) software that simulates complex phenomena, including underwater and underground explosions. These simulations are crucial for defense applications, mining engineering, offshore structures, and protective design

Underwater Explosions in Abaqus

Rapid expansion of gas bubbles creates shock waves

Rapid expansion of gas bubbles creates shock waves

Strong fluid-structure interaction effects

Complex pressure wave propagation through water

Modeling Approaches

Coupled Eulerian-Lagrangian (CEL) method: Most common approach where water is modeled as an Eulerian material and structures as Lagrangian

Acoustic medium approach: For far-field effects where nonlinearities are less important

SPH (Smoothed Particle Hydrodynamics): For extreme deformation cases

Important Considerations

Equation of state for water (usually Mie-Grüneisen), Shock wave propagation characteristics, Bubble dynamics, and collapse effects, Free surface and boundary reflections

Underground Explosions in Abaqus

Key Characteristics

Soil/structure interaction effects

Crater formation and soil ejecta

Stress wave propagation through heterogeneous media

Pore pressure effects in saturated soils

Modeling Approaches

Conventional Lagrangian approach: For small deformation cases

CEL method: For large deformation and soil flow

Porous media models: For saturated soil conditions

Important Considerations

Soil constitutive models (Drucker-Prager, Cap models, etc.), Strain rate effects on soil strength, Pore fluid coupling for saturated soils, Depth and confinement effects on explosion behavior

Abaqus provides robust capabilities for these challenging multiphysics problems, though they require careful model setup, appropriate material definitions, and often significant computational resources. The choice of specific modeling approach depends on the problem’s focus (near-field vs far-field effects, structural response vs medium response, etc.)

In this package, you will learn all types of Underwater and Underground Modeling and Simulation, including all materials and methods

The package contains twenty separate tutorials, including cae, inp, code, paper, reference of the materials, and a step-by-step English video. You can check the titles of the tutorials below