Hi there, I'm using the Abaqus code to compute the frequency response function for displacement excitation, but now I am confusing about how to request the output for displacement magnitude,and I found in the manual PU is described as "Magnitude and phase angle of all displacement components at the node and magnitude and phase angle of the rotations at nodes with rotational degrees of freedom.". But now I have requested history output for U of a certain Nset. Is it necessary to apply PU instead to write the information to an external result file?
To make it short & clear, What is the differnce between U and PU in SSD Analysis? Is U appropriate?
Thanks in advance.