Combine Static load cases (Controller-Based Algorithm)

This task shows you how to combine multiple load cases when using the BEAD_CONTROLLER algorithm.

Context: If more load cases and/or substeps are present in the FE-analysis, Tosca Structure.bead will try to combine all these load cases.

  1. The "best-practice-way" is to define each load case separately in its own DRESP.
  2. Thereby you can easily give the load cases different weights in the objective function: 

    
OBJ_FUNC
  ID_NAME = minimize_compliance
  DRESP   = dresp_compliance_1, 0.90
  DRESP   = dresp_compliance_2, 1.10
  TARGET  = MIN
END_

    Here, the first design response is weighted 10% less than the norm, and the second 10% more than the norm. The norm (1.0) is default.

    Important:
    • It is highly recommended only to combine linear static load cases.
    • It is recommended to look up the definition of load cases.
    • The reference value has no effect in the controller algorithm.

    Tosca Structure.bead will try to combine All load cases in the finite element calculation with the weighting of 1.0.
    Important: This method is NOT recommended and the former mentioned method of defining the load cases separately and then combining them in the objective function is emphasized.