Standoff Variation Study II: Detonation of a Donor Munitions Stack and Responses of a Thin Rectangular Water Barricade and an Acceptor Stack

摘要

This report documents the second stage of the continuation of the fully coupled numerical modeling of the detonation of a simplified munitions stack in a temporary storage area and the subsequent effects on the immediate surroundings of the stack. Three plausible configurations of this munitions stack, referred to as the 'donor' stack, an intervening water barricade, and an 'acceptor' munitions stack are modeled in two-dimensional (2-D) Cartesian hydrocode computations using the cTH hydrodynamics computer code. The distance between each munitions stack and the barricade, referred to as the 'standoff' distance, is varied from one computation to the next, with the physical characteristics of the munitions stacks and barricade themselves remaining unchanged. The donor stack is modeled as an uncased, condensed high-explosive charge with a rectangular cross section. The water barricade has a relatively thin rectangular cross section, and the acceptor stack is a solid iron rectangle. The loadings on both the barricade and the acceptor stack are computed, as are their fully coupled responses to those loadings. Only a relatively weak inverse functional relationship with standoff distance was found in the barricade response. Weak correlations with both standoff distance and face separation were also found for all parameters that were evaluated for the acceptor stack response, except for the whole-body acceleration. The results are compared with those of the first part of this study on the coupled blast loading and response computations for a massive water barricade with a trapezoidal cross section.