April 16, 2021 at 4:47 pm

Bill Bulat

Ansys Employee

Hi,I was unable to download the paper you referenced.nI thought that the Piezo and MEMS ACT enabled you to calculate impedance or admittance:nnWhat the ACT does can be done manually with APDL. Consider file wirebond3.dat associated with Technology Showcase #39 in our Help:nnI listed part of the file below. The complex frequency dependent charge reaction at the master node of a coupled set (CP,,VOLT) of nodes used to model an electrode is read into POST26 variable # 2. A complex factor (j*2*pi) is then specified as a coefficient used in an operation in which variable 1 (frequency) is multiplied by variable 2 (charge) to give variable 3 (current). The nodal voltage of the electrode is read into variable 4, which is divided by current (variable 3) to give impedance (variable 5). All variables are complex (the analysis was harmonic response). MAPDL's POST26 processor does complex math. The amplitude of the impedance is then plotted (PLVAR,5). Use the PLCPLX command before the PLVAR,5 command to plot the amplitude, real or imaginary part, or the phase of the impedance.nn/show,pngn/post26nfile,,rstpnnumvar,200nrforc,2,N_POSITIVE,chrgncfact,0,2*acos(-1)nprod,3,1,2,,currentnnsol,4,N_POSITIVE,voltnquot,5,4,3,,impedancen/title,Electrical impedancen/axlab,y,Impedancenprvar,2,3,4,5nplvar,5nnI hope this helps!nKind regards,nBillnn