I've been doing a harmonic response analysis using ansys workbench for a while. At first, I thought FRF of deformation would be pretty much similar to FRF of acceleration when analyzing the result. Like, finding resonance points by checking the modal frequency result at the FRF. But I found the FRF of deformation acts bit different than FRF of acceleration. I can't find how to analyze the upward peaks or downward peaks from the FRF of deformation. Any helps would be greatly appreciate.