Differential sensitivity theory applied to the MESA code
- Group X-3, MS F663 (United States)
- 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-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 309:1; Conference: Production and neutralization of negative ions and beams, Upton, NY (United States), 9-13 Nov 1992; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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