
Accession Number : AD0848291
Title : The Cagnaird Method for Investigating Edge Effects in the HighExplosive Simulation Technique (Hest), Project Hest Test V.
Descriptive Note : Rept for JanJun 68,
Corporate Author : AGBABIANJACOBSEN ASSOCIATES LOS ANGELES CA
Personal Author(s) : Lee, L. C. ; Malthan, J. A.
Report Date : FEB 1969
Pagination or Media Count : 157
Abstract : The physical geometry of the HEST cavity introduces peculiarities which are not normally part of an idealized nuclear event. This study is limited to an examination of the effects caused by the finite dimensions of the loaded area (otherwise termed the HEST edge effects). The HEST configuration is idealized as a homogeneous isotropic elastic semiinfinite halfspace loaded by a traveling pressure pulse in a buried rectangular cavity. The Cagnaird method is used to provide the halfspace response as a superposition of closedform solutions for the linear twodimensional problem of a single spherical source. The HEST edge effects are studied in detail by comparing the halfspace response of the simulated HEST load to that of an enlarged load cavity, with part or all edge effects excluded. The study shows that the principal effect of the cavity edges is to produce outward horizontal motions beneath the test cavity. Crossaxis coupling, defined as the vertical and alongtheedge motions induced by this outward motion, is weak and seems to suggest that twodimensional plane strain calculations may be realistic, particularly at subcavity locations away from the edges. (Author)
Descriptors : (*NUCLEAR EXPLOSIONS, DATA PROCESSING), BLAST, SURFACE BURST, SHOCK WAVES, PROPAGATION, LOADS(FORCES), SOILS, MATHEMATICAL MODELS, COMPUTER PROGRAMMING, COMPUTER PROGRAMS, MOTION, SIMULATION.
Subject Categories : Computer Programming and Software
Distribution Statement : APPROVED FOR PUBLIC RELEASE