Impedance Magnitude Offset Error 回答済み
I am trying to model a piezoelectric disc located inside a piezoelectric ring and separated with a layer of epoxy. I have created two axisymmetric models which are exactly the same apart from where the loads are added. In the first model, the disc has loads added to the top and bottom faces whereas the other model has loads added to the top and bottom faces of the ring. I have double-checked all model settings including area-scaling and material properties, and I can't find any discrepancies apart from load location (i.e. either loads on the disc or on the ring).
When I take the impedance magnitude of the modelled results from the flex history file for each model and plot them against results I have from lab measurements, the ring loaded model agrees well to the measurements however the disc loaded model appears to have a large offset in terms of its impedance magnitude compared to the measurements (shown in the graph), the frequency of the resonances are a little offset from the measured result as well but I am more concerned about the magnitude offset at the moment.
I am looking for some advice as to what I could be doing wrong with the model since both models have all settings the same apart from where the loads have been added.