Notch Optimizing with Fixed Reference Value

For full control over the Tosca Structure.shape controller the user might prescribe a fixed reference value. This can be used to force the homogenization to around a certain value.

This task shows you how to:

Context:

Important:

This is not a stress constraint. It is simply a way to gain more influence over the shape controller.

The effect is clearly seen in the following figure:

The hole plate example is considered with a reference value of 70 N/mm and 120 N/mm:

  • A low reference value enforces more growth
  • A high reference value enforces more shrinkage

Notch Optimize in Tosca Structure.gui

  1. Choose Command > OBJ_FUNC.
    The OBJ_FUNC dialog appears.
  2. Select Target= MinMax.
  3. Set RefValue to 120.

Tosca Structure Parameter File

The resulting command in the parameter file look like follows: 


OBJ_FUNC
 ID_NAME        = MY_OBJ_FUNC
 TARGET         = MINMAX
 DRESP          = DRESP_VON_MISES, , 120.
END_