NUMERICAL OPTIMIZATION OF IGNITION AND GROWTH REACTIVE FLOW
MODELING FOR PAX2A1
E.L. Baker2, B. Schimel3 and W.J. Grantham3
Abstract
Variable metric nonlinear optimization has been successfully applied
to the parameterization of unreacted and reacted products thermodynamic
equations of state and reactive flow modeling of the HMX based
high explosive PAX2A. The NLQPEB nonlinear optimization program
has been recently coupled to the LLNL developed two-dimensional
high rate continuum modeling programs DYNA2D and CALE. The resulting
program has the ability to optimize initial modeling parameters.
This new optimization capability was used to optimally parameterize
the Ignition and Growth reactive flow model to experimental manganin
gauge records. The optimization varied the Ignition and Growth
reaction rate model parameters in order to minimize the difference
between the calculated pressure histories and the experimental
pressure histories.
1 -- Baker, E.L., Schimel, B.D., and Grantham, W.J., "Numerical Optimization of Ignition and Growth Reactive Flow Modeling for PAX2A," APS Topical Conf. on Shock Compression of Condensed Matter, Seattle, WA, August 13-18, 1995.
2 -- Energetics and Warheads Division, U.S. Army, ARDEC, Picatinny
Arsenal, NJ 07806
3 -- Mechanical and Materials Engineering Department, Washington
State University, Pullman, WA 99164
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