Defining a Free Frequency Scenario

You can define a free frequency scenario to compute free vibration modes (without restraint specifications).

Before you begin: A structural analysis simulation referencing a finite element model and containing an activated Scenario object must be open.
Related Topics
Creating an Analysis Scenario
Modifying the Excitations and the Parameters of a Scenario
Creating Excitations
Updating Scenarios
Executing a Simulation from the Structural Analysis Workbench
Viewing the Structural Analysis Simulation Results

  1. Create a free frequency scenario. See Creating an Analysis Scenario.

    1. In the Scenarios toolbar, click Analysis Scenarios .
    2. In the list, select Free frequency.
    3. Click OK.

    The Free Frequency dialog box appears. By default, a new and empty mass set (New Masses) is referenced in the Excitations tab. At this stage, this set does not exist yet. It is created at the same time as the scenario.

  2. Optional: In the Name box, modify the scenario name.

  3. If the product contains several finite element model representations, select the finite element model representation you want to use in the FE Model box. If the product contains only one finite element model representation, this representation is selected automatically in the FE Model box.

  4. To define a free frequency scenario without additional masses:

    1. Select the Masses tab.
    2. In the Referenced list, select the referenced mass set.
    3. Click .

  5. Optional: Define the frequency parameters.

  6. Click OK.