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Is it possible to plot the statistical average frequency used by the Steinberg method in the Mechanical Fatigue Tool?

- March 17, 2023 at 1:11 pm
  
  Solution
  Participant
  
  Not directly, but you can obtain and plot it using user defined results. The statistical average frequency is defined as: [1/(2*pi)*(velocity/displacement)]. You can extract the displacement as one user-defined result and the velocity as another user-defined result. You can then calculate the statistical average frequency as another user-defined result using the displacement and velocity user-defined results. The displacement is the first moment of the stress term. The velocity is the second moment. Thus, for example, you can calculate the statistical average frequency for 1-sigma equivalent stress (SPSD) by extracting the displacement (first moment) as a user-defined result and the velocity (second moment) as another user-defined result. You can then create a third user-defined result using the expression: [1/(2*pi)*(velocity/displacement)]. You can then plot the statistical average frequency user-defined result. See attached test model.
  
  Attachments:
  1. 2060374.zip

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