DV_SHAPE

Definition of the design nodes for shape optimization.

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About Design Variables (DV_SHAPE)

ID_NAME

= <id_name_of_dv_shape>

Name of the DV_SHAPE definition.

ND_GROUP

= <name_of_node_group>

Name of the node group.

INITIAL_DV_FIELD

= <name_of_file>

Name of the file with the initial optimization displacement field to be used for the optimization.

Remarks

  1. Only surface nodes are regarded as being design nodes at ND_GROUP.
  2. Single standing nodes are not regarded as being design nodes at ND_GROUP.
  3. Midside nodes are not considered to be design nodes at ND_GROUP. The midside nodes are placed between the edge nodes at the end of the design cycle.
  4. The INITIAL_DV_FIELD option is available only for sensitivity-based optimization.
  5. The file applied at INITIAL_DV_FIELD that contains the initial optimization displacements field must be located in the start directory of the optimization job. The format of the file must be ONF (Optimization Neutral File). The initial optimization displacements field is extracted from the data block 730 with the title DISP_OPT.
  6. When using optimization displacements of a previous optimization run for the new optimization, it is recommended to rename the file SHAPE_XXX.onf (for example, to INITIAL_OPT_DISPL.onf). Otherwise name conflicts with the running optimization (with newly generated optimization displacements files SHAPE_XXX.onf) might lead to confusion in the postprocessing.
  7. INITIAL_DV_FIELD for shape optimization means initial optimization displacements.

Examples

DV_SHAPE
  ID_NAME  = my_dv_shape
  ND_GROUP = design_node_grp
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