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How to model losses/damping in ultrasonic transducer COMSOL and ANSYS Simulations

Husain Shekhani • Feb 13, 2023

I hosted a webinar on February 10, 2023 on

"How to model losses/damping in ultrasonic transducer COMSOL and ANSYS Simulations"

You can watch the recording on my YouTube Channel here: 

https://youtu.be/xmjj108b7WY

Here is a link to the presentation notes and excel calculations.


Topics

In this webinar, I talk about how to implement damping in ultrasonic transducer simulations (i.e frequency response simulations).


I first demonstrate the measurement of the mechanical quality factor using impedance analysis, high power analysis (oscilloscope measurement). I also consider a loaded and unloaded case.


I use the quality factors to input loss parameters and I optimize the representation of losses in the ceramic (PZT crystal), metal (aluminum and steel), and boundary losses (from the load).


I use COMSOL in this analysis, but I the methods also apply to ANSYS.


Here is the outline of the webinar.

  • 0:40 - Webinar outline
  • 1:51 - Quick overview of my consulting services
  • 3:40 - Rehash of webinar outline
  • 7:46 - Importance of damping in simulations
  • 12:50 - Experimental transducer and loading condition
  • 15:09 - Experimental methods (impedance analysis and oscilloscope measurements)
  • 15:34 - Impedance analysis of low power (loaded and unloaded)
  • 19:00 - Oscilloscope analysis for high power (loaded and unloaded)
  • 23:30 - Summary parameters for impedance/admittance and quality factors
  • 32:43 - COMSOL - set up of the simulation - geometry and materials
  • 32:49 - COMSOL - how to represent losses in ANSYS and COMSOL
  • 35:40 - Strategy to tune model losses to reflect low power and high power AND loaded and unloaded losses
  • 40:00 - COMSOL model walk through to analyze material losses and boundary losses


***Announcement***

My next webinar will be 11AM ET - March 10, 2023  "Build, test, simulation, and analysis of an ultrasonic atomizer/nebulizer"

Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar

Follow the link here to learn about my ultrasonic transducer consulting services and prices

Services and Prices

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