36.5.3. The Sensitivities Files

The sensitivities file is created or updated after each computation of the sensitivities. This file is not used with the internal optimizer, and is only created when you have specified that only the sensitivities are calculated. This file contains blocks of information related to design variables and optimization functions (objective and constraint). Only the value and sensitivities are relevant.

The following provides examples of the various blocks of information:

design variable (block DSGFLD)

 BEGIN DSGFLD
 #       ___ design variable name
 #      /
  C 16|End_Parallel_Dis
  I  1|  17
  I  1|   4
 #       ___ lower and upper bound
 #      /
  D  2|  0.0000000E+00 0.4990000E+01
 #       ___ current value
 #      /
  D  1|  0.4411740E+01
  ENDOF DSGFLD

optimization functions (block RESULTOC) and their sensitivities (block DERIVATIVE)

 BEGIN RESULTOC
  C 21|Objective Function #1
  I  3|   1   1   0
  D  3| 0.1000000E+01 0.0000000E+00 0.1000000E+01
 #        ___ current value
 #       /
  D  2| 0.3310040E+03 0.0000000E+00
  BEGIN DERIVATIVE
 #        ___ design variable name
 #       /
  C 16|End_Parallel_Dis
 #        ___ sensitivities value
 #       /
  D  1| -0.2131169E+02
  ENDOF DERIVATIVE
  BEGIN DERIVATIVE
  C  10| J_F_Displ.
  D   1| -0.7662757E+02
  ENDOF DERIVATIVE
  ENDOF RESULTOC