QUESTION:
Do you have an example demonstrating the procedure for calculating the response of a piezo transducer operating under hydrostatic pressure?
ANSWER:
Working files for a prestressed harmonic response analysis are attached to this solution. Seems to work ok, though I'm a little uncertain about the following:
1) Electrodes are electrically open (seperate CP's on VOLT) during static prestress run (hydrostatic pressure applied). Should they be grounded? Unsure. May be a function of operating conditions. Simple changes could be made to the input file to investigate further.
2) Postprocessing: range in voltage in the attached voltage animation increases dramatically w/prestress pressure (I ran several cases). I assume that the actual working voltage, displacements, stresses would be a superposition of those obtained from prestress static run and the subsequent harmonic response results (add a DC bias to the AC response). This has not been done here but is relatively straightforward.
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QUESTION: Do you have an example demonstrating the procedure for calculating the response of a piezo transducer operating under hydrostatic pressure? ANSWER: Working files for a prestressed harmonic response analysis are attached to this solution. Seems to work ok, though I'm a little uncertain about the following: 1) Electrodes are electrically open (seperate CP's on VOLT) during static prestress run (hydrostatic pressure applied). Should they be grounded? Unsure. May be a function of operating conditions. Simple changes could be made to the input file to investigate further. 2) Postprocessing: range in voltage in the attached voltage animation increases dramatically w/prestress pressure (I ran several cases). I assume that the actual working voltage, displacements, stresses would be a superposition of those obtained from prestress static run and the subsequent harmonic response results (add a DC bias to the AC response). This has not been done here but is relatively straightforward. |
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