Is it possible to plot the statistical average frequency used by the Steinberg method in the Mechanical Fatigue Tool?
Tagged: 2019 R2, fatigue, materials, mechanical, structuralmechanics


March 17, 2023 at 1:11 pmFAQParticipant
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 userdefined result and the velocity as another userdefined result. You can then calculate the statistical average frequency as another userdefined result using the displacement and velocity userdefined 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 1sigma equivalent stress (SPSD) by extracting the displacement (first moment) as a userdefined result and the velocity (second moment) as another userdefined result. You can then create a third userdefined result using the expression: [1/(2*pi)*(velocity/displacement)]. You can then plot the statistical average frequency userdefined result. See attached test model.
Attachments:
1. 2060374.zip

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