Are there any examples showing how to find the acceleration at any given node (not at a vertex) in an ANSYS Workbench Simulation harmonic response analysis?
Yes, please see the attached ANSYS Workbench Simulation 11.0 SP1 MSUP harmonic response analysis example. The acceleration is just the displacement times the negative of omega squared, and omega is just 2*PI*frequency, where the frequency is variable 1 in POST26 (the Time History Postprocessor). Note that the velocity is actually 90 degrees out of phase from the real values shown. 

