Basic software questions about Area Scaling, Piezoelectric Poling and post-processing Answered
Good day,
I am new to ultrasound FEA and have completed a few of the tutorials and managed to model my piezo transducer system as a transmit-receive pair through a medium as a 2D model successfully by adapting tutorial code.
I'm currently trying to get a 3D version done and I have it running however I would like to learn a bit more about the Area Scaling parameter when setting up a piezoelectric load. I've set them at 1.0 since that seemed sensible however I'm not sure if that's the correct value for my model.
I'd be grateful if anyone could answer these questions:
1) What is the "Load Area Scaling" parameter in piezoelectric loads and what value should I use for my 3D Z-axis symmetric model? (See attached image)
2) What does "Piezo Poling" mean? I think it's the direction of the piezo operation mode, either radial or longitudinal mode? If that's the case does Y+ or Y- matter? In my case the piezos are angled so how should the poling be set up?
3) Is there a way to superimpose the model boundaries in the snapshot data? When I look at it and the video file the whole model appears to be one solid shape, none of the individual components can be seen, is it possible to see the edges of each component in the viewport?
Thanks in advance,
Yasheen
2 comments
Hi Yasheen,
Welcome to the forum!
To answer your questions:
1. "Load Area Scaling" is the scaling factor for electrode area. This is used to account for the z-dimension in 2D plane strain models and symmetry planes in 2D and 3D models. For example, if only half of an electrode's area is included within the model due to the assumption of a symmetry plane, the area scaling should be increased by a factor of 2.
The default area scaling is 1.0 except for 2D axisymmetric problems which defaults to 2ς since axisymmetric models evaluate a 1 radian sector of the physical problem.
2. Here is a blog post which details "Piezo Poling" - https://onscale.com/blog/how-to-optimize-saw-filter-cut-angle-in-onscale/ and explains how to specify this at an angle.
3. You can use our standard graphics to see the lines of the model by using the following code before the plots:
grph
type stnd
I hope this helps.
Best regards,
Chloe.
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