A Comparison Of Hydrodynamic And Analytic
Predicted Blast Pressure Profiles
Author(s)
G. M. Stunzenas & E. L. Baker
Abstract
Modeling the structural response to blast relies on accurate descriptions of the
blast loading pressure profiles. Traditionally, empirically based blast pressure
histories are used for this modeling. However, the structural response and
geometric configuration can strongly affect the blast loading profile, particularly
for close-in blast loading configurations. As a result, high rate continuum
modeling is being increasingly applied to directly resolve both the blast profiles
and structural response. A variety of computer models exist for the purpose of
analyzing blast pressures associated with different types of explosive charges
and ranges. These computer models range from simple empirically based
analytic models based off of the Hopkinson cube root scaling to multi-physics
high rate finite element approaches, commonly known as \“hydrocodes”, which
are capable of tracking shocks through the conservation equations of continuum
mechanics. The purpose of this paper is to provide comparisons of blast profiles
predicted by analytic models with a hydrodynamic model at various standoffs.
Three computer models; BlastX, Conwep, and ALE3D, were used to model the
detonation of five pounds of TNT. Pressure profiles for various standoffs were
gathered from each computer model and compared. The ALE3D result is greatly
dependant on the mesh size and appears to converge to the BlastX and Conwep
solutions with increased mesh resolution.
Keywords: blast, explosives, modelling.
1 Introduction
Modeling the structural response to blast relies on accurate descriptions of the
blast loading pressure profiles. Traditionally, empirically based blast pressure
Keywords
blast, explosives, modelling
Related Book
Other papers in this volume
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