Structural Dynamics

Structural Dynamics

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

    • FAQFAQ
      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.