Hi
Sure:
https://courses.ansys.com/index.php/courses/modal-analysis-in-ansys-mechanical/
https://courses.ansys.com/index.php/courses/modal-analysis/
See also the help manual (seaech for modal analysis) where we specify this:
'All structural supports can be applied except a non-zero Displacement, a Remote Displacement, and the Velocity support.'
All the best
Erik