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