Creating Frequency Loading

You can use a Frequency Loading step to introduce harmonic excitation at a given frequency to a mode-based or subspace-based steady-state dynamic step in your analysis.

This task shows you how to specify frequency loading.

  1. Click the Frequency Loading icon .

    The Frequency Loading dialog box appears, and a Frequency Loading object appears in the specification tree under the Loads objects set for the current step.

  2. You can change the identifier of the load by editing the Name field.

  3. Select the geometry support (a point, vertex, or virtual part). Any selectable geometry is highlighted when you pass the cursor over it. You can select several supports to apply the load to all supports simultaneously. You can also select a body group.

    The Supports field is updated to reflect your selection. A temporary symbol will appear at the supports to indicate zero values until you apply a nonzero load.

  4. Specify the magnitude/phase data or real/imaginary data for this load:

    1. Toggle on Use magnitude-phase data to specify data in terms of magnitude and phase; toggle off this option to specify data in terms of real and imaginary components.

    2. Enter or import the data you want to specify to describe the motion of nodes for the frequency loading.

  5. Click OK in the Imported Load dialog box.

    Symbols representing the applied force are displayed on the geometry.