TEST_BEAD

Defines a test displacement for bead optimization.

Related Topics
In Other Guides
Testing the optimization setup (TEST_BEAD)

OPTIMIZE

= <name_of_optimization>

Name of the optimization task.

FORMAT

= ONF

Output in optimization neutral file (ONF) format.
 

= USER_FILE

Output of virtual test information in the (at USER_FILE item specified) format (e.g. table of displacement values,...).

FILE_NAME

= <name_of_output_file>

= TEST_BEAD

Name of the output file.

DIRECTION

= GROW

= SHRINK

= RANDOM

Direction of the test displacements (standard growth, standard shrinkage or non-standard nodal random displacement).

DISPLACE- MENT

= <value_of_max_displacement>

Maximum value of the test displacement.

INCREMENT

= <number_of_increments>

= 1

Number of increments.

Items for FORMAT = USER_FILE:

USER_FILE

= <id_of_userfile>

Userfile definition for user specific output of virtual optimization results.

Remarks

  1. TEST_BEAD is carried out immediately after entering the command as long as the user entries are correct.
  2. The automatic creation of the vtfx report requires the use of the default file name TEST_BEAD.
  3. Test displacements are always carried out with reference to a defined optimization task (OPTIMIZE).
  4. DIRECTION: There are three possibilities to define the direction of displacement: standard growth out of the component (GROW) for all design nodes in the optimization group, standard shrinkage into the component (SHRINK) for all design nodes in the optimization group or non-standard 'random' displacement of the design nodes in the optimization group (RANDOM).
  5. DISPLACEMENT: Maximum amount of displacement for the test displacements. If no value is set a mesh-dependent amount of displacement is automatically determined.
  6. INCREMENT: Number of increments in which the maximum absolute value of displacement of the test displacement is applied.
  7. Procedure: In increments (INCREMENT) a maximum absolute displacement value (DISPLACEMENT) for a given direction (DIRECTION) is applied to the design variables which have been allocated to the optimization problem (OPTIMIZE, see operator DV). All restrictions of the design variables (DVCON_BEAD entries) that have been allocated to the optimization problem (OPTIMIZE, see operator DVCON) are executed. For each increment a result file (FILE_NAME) in the given format (FORMAT) is produced.

Examples

TEST_BEAD
 OPTIMIZE = MY_OPT_TASK
 FORMAT = ONF
 FILE_NAME = TEST_BEAD
 DIRECTION = GROW 
 DISPLACEMENT = 3.67
 INCREMENT = 5
END_