Example: Defining the Eigenvalue

The task for this example is to define the Kreisselmaier-Steinhauser formulation for the first 5 eigenvalues of the first load case.

This task shows you how to:

Define in Tosca ANSA® environment

  1. Apply New > EIGENFREQUENCY on OBJ_FUNC_ITEM_1 or CONSTRAINTS item.

  2. In the LC_SET field enter a question mark "?".

  3. Click MORE 5 times and enter sub-steps 1 to 5 and click OK.

    This results in the following figure:

Define in Tosca Structure.gui

  1. Choose Command > DRESP.

    The DRESP menu appears.

  2. Define the Kreisselmaier-Steinhauser formulation as design response as shown in the following figure:

SIMULIA Tosca Structure Parameter File

  • The resulting command in the parameter file look like follows: 

    DRESP
 ID_NAME    = freq_kreissel
 TYPE       = DYN_FREQ_KREISSEL
 DEF_TYPE   = SYSTEM
 LC_SET     = MODAL,ALL,1-5
 LC_SEL     = MIN
END_