Description: When performing a response spectrum analysis, you must first convert the given dynamic event into a spectrum. In Abaqus/CAE you can now use the Amplitude toolset to define a spectrum by specifying the magnitude of the spectrum at all frequencies at each damping value. You can then use the spectrum amplitude in a response spectrum analysis. Figure 6–4 shows how you can read the data for the spectrum amplitude from a file.

Step module, Interaction module, or Load module:
    ToolsAmplitudeCreate: Type: Spectrum: define spectrum
 Step module:
    StepCreate: Linear perturbation: Response spectrum; Use response spectrum: select spectrum