Abaqus/CAE User's Guide  


57.7 Using modulated data to define an amplitude curve

Use the modulated definition method to define the amplitude, a, as

where , A, , , and are user-defined constants. For more information, see “Defining modulated data” in “Amplitude curves,” Section 34.1.2 of the Abaqus Analysis User's Guide.

To define an amplitude curve using modulated data:

  1. Display the Edit Amplitude dialog box as described in “Selecting an amplitude type to define,” Section 57.3.

  2. Click the arrow to the right of the Time span field, and specify how you want to define the amplitude as a function of time:

    • Select Step time for time that is measured from the beginning of each step.

    • Select Total time for total time accumulated over all non-perturbation analysis steps.

  3. In the Initial amplitude field, enter .

  4. In the Amplitude field, enter A.

  5. In the Starting time field, enter .

  6. In the Circular frequency 1 field, enter .

  7. In the Circular frequency 2 field, enter .

  8. Click OK to save your amplitude definition and to close the Edit Amplitude dialog box.