How can I quantify the importance of a negative modal covariance diagonal value in a psd solution?

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How can I quantify the importance of a negative modal covariance diagonal value in a psd solution?

How can I quantify the importance of a negative modal covariance diagonal value in a psd solution?

Tagged: 10, apdl, Mechanical APDL (f. ANSYS), Modal/Harmonic Response, structural-dynamics, structural-mechanics

- March 17, 2023 at 9:00 am
  
  FAQ
  Participant
  
  You can first use OUTPR,NSOL,1 to see the modal covariance table in the output. The contribution of a negative quantity on the diagonal can be evaluated by reading the mode in POST1 with a factor equal to the square root of the variance. The stresses obtained this way can be compared to the 1 sigma values for relevance.

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Structural Dynamics

How can I quantify the importance of a negative modal covariance diagonal value in a psd solution?

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New Post - - Structural Dynamics