Dynamic Analyses of Magazine Headwalls in the ESKIMO Tests

This report describes the results of dynamic response analyses of magazine headwalls in three tests, namely, ESKIMO 1, 2, and 4. The finite element models of the headwalls were subjected to blast loadings selected on the basis of measured data and theoretical investigations. The responses of the hea...

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Bibliographic Details
Main Author: Reddy, Damoder P.
Other Authors: AGBABIAN ASSOCIATES EL SEGUNDO CA
Format: Text
Language:English
Published: 1976
Subjects:
Ammunition and Explosives
Explosions
*EXPLOSION EFFECTS
*MAGAZINES(ORDNANCE)
FINITE ELEMENT ANALYSIS
DYNAMIC RESPONSE
DAMAGE ASSESSMENT
BLAST WAVES
DEFLECTION
DOORS
*Quantity distance storage
INSLAB computer program
eskimo*
Online Access:http://www.dtic.mil/docs/citations/ADA030885
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA030885
Description
Summary:This report describes the results of dynamic response analyses of magazine headwalls in three tests, namely, ESKIMO 1, 2, and 4. The finite element models of the headwalls were subjected to blast loadings selected on the basis of measured data and theoretical investigations. The responses of the headwalls were obtained using the INSLAB code, a nonlinear, dynamic finite element computer program. The behavior of the headwall material was described by a bilinear moment-curvative relationship, and the supporting soil was simulated by a series of nonlinear springs and linear dampers. The results of the calculations were compared with available test data. In general, the predicted behavior of the headwalls agreed very well with their observed behavior. The present analysis of the south headwall in ESKIMO 1, using the refined finite element mesh, showed better agreement with the test results than those from the previous analysis, which used a coarse mesh. The results for the east headwall, ESKIMO 2, showed that the computed permanent displacement contours are quite similar in shape to those measured. The results for the northeast headwall, ESKIMO 2, indicated that the concrete beams around the doorway were effective in reducing the maximum displacement of the headwall and that the biparting and sliding type of door was superior to the double-leaf and hinged type for resisting blast loads. The computed motions of the northeast headwall, ESKIMO 4, compared very well with the corresponding test data.

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