Standoff Variation Study I: Detonation of a Donar Munitions Stack and Responses of a Trapezoidal Water Barricade and an Acceptor Stack

Report No. ARL-TR-1943
Authors: Lottero, Richard E.
Date/Pages: May 1999; 79 pages
Abstract: This report documents 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. Five 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 here 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 trapezoidal 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. A moderate correlation with standoff distance, and a stronger correlation with the distance between the donor stack right face and the acceptor stack left face, were found for the acceptor stack response. The results are also compared with those of an earlier study on two uncoupled blast loading and response computations for one of the configurations.
Distribution: Approved for public release
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Last Update / Reviewed: May 1, 1999