To use a set of time value pairs to define a time history load, use the following procedure.

1. On the Loading ribbon tab, select the Time History > Forcing Function tool in the Dynamic Specifications group.
   
   The Add New: Time History Definitions dialog opens.
2. Type an Integration Time Step value in seconds.
3. (Optional) Select the Consider Missing Mass Mode option if necessary.
4. (Optional) Select the Save option to generate a file with time history data.
5. Select the Loading Type for your data:

   Acceleration

   or

   Force

   or

   Moment

6. Type the Define Time vs load data values in the table. As you add data pairs, the chart below is populated.
7. Click Add.