DV_BEAD

Definition of the design nodes for bead optimization. For more detailed information, see in the SIMULIA Tosca Structure 2023 user guide.

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Design Variables (DV_BEAD)

ID_NAME

= <id_name_of_dv_shape>

Name of the DV_BEAD definition.

ND_GROUP

= <name_of_node_group>

Name of the node group (design nodes).

INITIAL_DV_FIELD

= <name_of_file>

Name of the file with the initial optimization displacements 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 will be placed between the edge nodes at the end of the design cycle.
  4. Only nodes at shell elements might be defined as design nodes at ND_GROUP.
  5. The INITIAL_DV_FIELD option is only available for sensitivity-based optimization.
  6. 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.
  7. When using optimization displacements of a previous optimization run for the new optimization, it is recommended that you rename the file BEAD_XXX.onf (for example, to INITIAL_OPT_DISPL.onf). Otherwise name conflicts with the running optimization (with newly generated optimization displacements files BEAD_XXX.onf) might lead to confusion in the post-processing.
  8. INITIAL_DV_FIELD for bead optimization means initial optimization displacements.

Examples

DV_BEAD
  ID_NAME  = my_dv_bead
  ND_GROUP = design_node_grp
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