Hey.

I am currently extracting my matrices as:

*SMAT, MatM, D, import, full, beam_test.full, MASS

*print, MatM, MMAT_CBEAM_1.txt

Then I load the matrices into Matlab. Then I formulate an eigenvalue problem to calculate the natural frequencies. The natural frequencies I arrive at, is no where near the results obtained in ANSYS. I know that ANSYS uses sophisticated sorting, but is there anyway to get the sorted indices, or extract non-sorted matrices?

I found some source saying that the matrices are formulated so that only the upper triangular elements are defined, so I made them symmetric.

Thanks for any help!