Differential sensitivity theory applied to the MESA code

Conference · Sun Jul 10 04:00:00 EDT 1994 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:7140677

Henninger, R J ^[1]; Maudlin, P J; Harstad, E N ^[2]

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1. Group X-3, MS F663 (United States)
2. Group T-3, MS B216 (United States) Los Alamos, National Laboratory, Los Alamos, New Mexico 87545 (United States)

A technique called Differential Sensitivity Theory (DST) is applied to the system of equations solved by the MESA continuum mechanics code. DST uses adjoint technique to determine exact sensitivity derivatives, i.e., if R is a calculation result of interest (response R ) and [alpha][sub i] is a calculational input (parameter [alpha][sub i]), then [alpha]R/[alpha][sub i] is defined as the sensitivity. The advantage of using DST is that for an n-parameter problem [ital all] n sensitivities can be obtained by integrating the solutions from only [ital two] calculations, a MESA calculation and its corresponding adjoint calculation using an Adjoint Continuum Mechanics (ACM) code. This work presents the derivation and solution of the appropriate set of adjoint equations for the purpose of computing sensitivities for high-rate two-dimensional, multi-component, high-deformation problems. As an example, results for a flyer plate impact problem are given. [copyright]American Institute of Physics

• OSTI ID: 7140677
• Report Number(s): CONF-921145--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 309:1
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTER CODES
COMPUTERIZED SIMULATION
COPPER
ELEMENTS
IMPACT SHOCK
METALS
SENSITIVITY
SIMULATION
STRAIN RATE
TRANSITION ELEMENTS
TWO-DIMENSIONAL CALCULATIONS
VERY HIGH PRESSURE