Theory And Calibration Of JWL And JWLB
Thermodynamic Equations Of State
Author(s)
E. L. Baker, D. Murphy, L. I. Stiel & E. Wrobel
Abstract
Structure geometric configuration and response can be strongly coupled to blast
loading 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. In this modeling, the equation of state
for the detonation products is the primary modeling description of the work
output from the explosive that causes the subsequent air blast. The Jones-
Wilkins-Lee (JWL) equation of state for detonation products is probably the
currently most used equation of state for detonation and blast modeling. The
Jones-Wilkins-Lee-Baker (JWLB) equation of state is an extension of the JWL
equation of state that we commonly use. This paper provides a thermodynamic
and mathematical background of the JWL and JWLB equations of state, as well
as parameterization methodology. Two methods of parameter calibration have
been used to date: empirical calibration to cylinder test data and formal
optimization using JAGUAR thermo-chemical predictions. An analytic cylinder
test model that uses JWL or JWLB equations of state has been developed, which
provides excellent agreement with high rate continuum modeling. This analytic
cylinder model is used either as part of the formal optimization or for post
parameterization comparison to cylinder test data.
Keywords: blast, explosives, equation of state, modelling.
1 Introduction
Structure geometric configuration and response can be strongly coupled to blast
loading particularly for close-in blast loading configurations. As a result, high
Keywords
blast, explosives, equation of state, modelling
Related Book
Other papers in this volume
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