Why when running a LANCZOS modal analysis (*frequency) does the message file output output eigenvalues rather than frequency? According to theory the frequency is the square route of the eigenvalue but does not seem to be the case for my model.

Eigenvalue 5.45387e+07 produces 358Hz? Root of the eigenvalue is 7385Hz.

This is a cyclic symmetric model - should that matter.

Abaqus ​​​​​​​