About base excitation

[22ek075]

I am currently working on a “Transient Structural Analysis” 
. I am trying to reproduce a vibration experiment in my analysis. Therefore, I would like to use “base excitation” when inputting acceleration. However, when I select “YES” for base excitation, I cannot select the geometry in the boundary conditions. How can I select the surface of the base as a boundary condition?

[peteroznewman]

See if you find something helpful in this discussion: https://innovationspace.ansys.com/forum/forums/topic/base-excitation-absolute-result/

Base excitation is available when you are doing a Modal Superpostion type of Transient Structural and the supports must be Fixed or Remote Displacement with six zero values.