54.3 Selecting an amplitude type to define

Select ToolsAmplitudeCreate from the main menu bar to create an amplitude. For detailed information on amplitudes, see “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.

To define an amplitude curve:

From the main menu bar, select ToolsAmplitudeCreate.
Tip: You can also create an amplitude by clicking Create in the Amplitude Manager.
The Create Amplitude dialog box appears.
In the Name field, enter a name for the amplitude. For information on naming objects, see “Using basic dialog box components,” Section 3.2.1.
Choose the Type of amplitude that you want to create:
- Choose Tabular to define the amplitude curve as a table of values at convenient points on the time scale. Abaqus interpolates linearly between these values, as needed. For more information, see “Defining tabular data” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose Equally spaced to give a list of amplitude values at fixed time intervals beginning at a specified value of time. Abaqus interpolates linearly between each time interval. For more information, see “Defining equally spaced data” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose Periodic to define the amplitude, a, as a Fourier series:
  where , N, , , , and , , are user-defined constants. For more information, see “Defining periodic data” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose Modulated to define the amplitude, a, as
  where , A, , , and are user-defined constants. For more information, see “Defining modulated data” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose Decay to define the amplitude, a, as
  where , A, , and are user-defined constants. For more information, see “Defining exponential decay” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose Solution dependent to calculate amplitude values based on a solution-dependent variable. For more information, see “Defining a solution-dependent amplitude for superplastic forming analysis” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose Smooth step to define the amplitude, a, between two consecutive data points and as
  where . For more information, see “Defining smooth step data” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
- Choose User to define the amplitude curve in user subroutine UAMP (Abaqus/Standard) or VUAMP (Abaqus/Explicit). For more information, see “Defining an amplitude via a user subroutine” in “Amplitude curves,” Section 29.1.2 of the Abaqus Analysis User's Manual.
Click Continue.
The Edit Amplitude dialog box appears in which you can enter all of the data necessary to define the amplitude curve. See the following sections for detailed instructions:

For information on related topics, click any of the following items: