Numerical Simulation of Fluid-Structure Interaction Using an Impulse Plug
Dr. Roger Veldman, Hope College
The goal of this project was to develop a method for simulating the effects of fluid-structure interaction upon plates of varying thickness resulting from a high explosive blast. This effect was simulated by modeling an impulse plug model using the commercial explicit finite element software AUTODYN. Four different plug thicknesses were used ranging from 0.040 inches to 2.0 inches. All of the components in this system were modeled in AUTODYN including the impulse plug, a non-responsive shield, the surrounding air and the high explosive. The plug and shield were modeled using Lagrangian elements while the air and explosive were modeled using Eulerian elements. The 3D representation of the model was created by revolving a 2D axial symmetry around the desired axis. From the results of the simulation, the predicted plug velocity was used to calculate blast impulse that impinged on the plug face. The results of these predictions showed no significant differences in the impulse delivered to the plugs of varying mass.
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