An accelerogram is a graphical representation of the acceleration that occurs at a specific point in time. This acceleration-time diagram can be used to generate response spectra or to perform a time history analysis. Many accelerograms are available in the form of records of past earthquakes.
The use of accelerograms is described in the chapter Accelerograms of the Response Spectrum Analysis add-on.
Accelerograms are assigned in the Accelerogram tab of a load case.