Eigenvalue Analysis helps to improve the completeness and accuracy of your mechanical system. You can compare to simulation results of Eigenvalue Analysis with finite element analysis (FEA) and use Eigenvalue Analysis to improve the stability of systems. For the eigenvalue analysis, you can define two parameters: Frames per cycle and Amplitude factor. Their parameters are used to control the display of the mode shapes of a system.
Figure 1 Eigen icon of the Simulation Type group in the Analysis tab