Perhaps this helps also.
The actual absolute values of the displacement results (mode shape) do not mean anything in modal analysis, as these are scaled/normalised eigenvectors/mode shapes.
Only the frequency and the overall mode-shape are of interest (so if the mode shape is bending, torsional, etc), but not the absolute/actual values of the displacements.
See the help manual (search for mass normalized), and our course for more info on this https://courses.ansys.com/index.php/courses/modal-analysis-in-ansys-mechanical/lessons/how-to-perform-modal-analysis-lesson-1-2/
Also this helps: https://www.eng-tips.com/viewthread.cfm?qid=83495
All the best