SENSITIVITIES FOR TAYLOR-TEST MODEL PARAMETERS

Conference · Tue May 01 00:00:00 EDT 2001

DOI:https://doi.org/10.1063/1.1483539· OSTI ID:782815

HENNINGER, R J

The Taylor-Cylinder test has long been used to calibrate equation-of-state and material-strength models. The process consists of impacting a cylinder of material on a rigid anvil and adjusting the model parameters to predict the resultant shape. Here we discuss the use of Automatic Differentiation (AD) of an Eulerian hydrodynamics model to provide sensitivities that are used as a gradient in the parameter fitting process. We apply AD in the forward and adjoint modes. For comparison, the gradient is also determined by finite differences. We find that adjoint methods provide the most efficient use of computational resources when there are 9 or more parameters.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 782815
• Report Number(s): LA-UR-01-2890; TRN: AH200128%%488
• Resource Relation: Journal Volume: 620; Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 May 2001
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
HYDRODYNAMICS
SHAPE
CYLINDERS
TESTING