Abstract
Numerical simulations using two hydrocodes were compared to near-field measurements of blast impulse associated with ideal and non-ideal explosives to gain insight into testing results and predict untested configurations. The recently developed kinetic plate test was designed to measure blast impulse in the near-field by firing spherical charges in close range from steel plates and probing plate acceleration using laser velocimetry. Plate velocities for ideal, non-ideal and aluminized explosives tests were modeled using a three dimensional hydrocode. The effects of inert additives in the explosive formulation were modeled using a 1-D hydrocode with multiphase flow capability using Lagrangian particles. The relative effect of particle impact on the plate compared to the blast wave impulse is determined and modeling is compared to free field pressure results.
Highlights
Advanced hydrocodes can be used, together with high-performance computing, to predict the response of structures subjected to blast loading environments [1]
The newly developed kinetic plate test [2, 3] is designed to measure impulse in the near field by measuring the momentum imparted to a square steel plate by an explosive detonation at small standoff distance from the plate
Kinetic plate test experiments In the experiments, a spherical charge is placed at a standoff distance of either 6 inches [2, 3] or 10 inches [2] from the steel plate, measured from the center of the explosive charge to the closest point on the plate
Summary
Advanced hydrocodes can be used, together with high-performance computing, to predict the response of structures subjected to blast loading environments [1]. Experimental tests can be designed to help validate the numerical results from these hydrocodes for scenarios of interest. Accurate simulation of the impulse delivered by the charge is necessary to correctly predict structural response. The newly developed kinetic plate test [2, 3] is designed to measure impulse in the near field by measuring the momentum imparted to a square steel plate by an explosive detonation at small standoff distance from the plate. Modeling the steel plate’s response and comparing the numerical to experimental results helps assess the capabilities of the model when predicting the effects of explosives on structures
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