Rynyl
Mechanical
- Oct 2, 2016
- 1
Hello all. New member to the forum here, and relatively new to FEA in general.
So, for some research that I'm doing, I'm trying to model an ultrasound pulse (such as the one shown below) as it propagates through water and a subject material (steel for now). The pulse, after echoing off the subject material, will return back to the transceiver. The resulting signal (acoustic pressure or sound level) read by the transceiver is the data I'm looking for. Basically, I'm trying to simulate an ultrasound scan that would be used in non-destructive testing.
![URL]](https://res.cloudinary.com/engtips/image/fetch/w_800,c_lfill,q_auto,f_auto,g_faces:center/[URL unfurl="true"]http://www.patentsencyclopedia.com/img/20100286516_03.png[/URL])
Here's my issue: currently, I'm working in the time domain with 2 spatial dimensions. While this is easy to model because it's intuitive, the solver is taking longer than I'd like at this stage (~10 minutes). This is because the mesh needs to be super refined to properly capture the ultrasound pulse, and the time steps needs to be small in order to generate a clear output signal. As my subject material becomes more complicated (i.e., a composite), and I move into 3D analysis, I'm afraid the solver is going to take a prohibitively long time.
My question is: is there a way to perform this study in the frequency domain (which takes less time with a more refined mesh) and then back out the time-dependent signal read by the transceiver using an FFT? In my gut, I feel like this should be possible, but I'm not 100% certain on the methodology.
I can post pictures of my geometry and such if needed, but I'm away from my work computer at the moment. I'm using COMSOL to perform these studies, but that shouldn't make a difference.
Thanks!
So, for some research that I'm doing, I'm trying to model an ultrasound pulse (such as the one shown below) as it propagates through water and a subject material (steel for now). The pulse, after echoing off the subject material, will return back to the transceiver. The resulting signal (acoustic pressure or sound level) read by the transceiver is the data I'm looking for. Basically, I'm trying to simulate an ultrasound scan that would be used in non-destructive testing.
Here's my issue: currently, I'm working in the time domain with 2 spatial dimensions. While this is easy to model because it's intuitive, the solver is taking longer than I'd like at this stage (~10 minutes). This is because the mesh needs to be super refined to properly capture the ultrasound pulse, and the time steps needs to be small in order to generate a clear output signal. As my subject material becomes more complicated (i.e., a composite), and I move into 3D analysis, I'm afraid the solver is going to take a prohibitively long time.
My question is: is there a way to perform this study in the frequency domain (which takes less time with a more refined mesh) and then back out the time-dependent signal read by the transceiver using an FFT? In my gut, I feel like this should be possible, but I'm not 100% certain on the methodology.
I can post pictures of my geometry and such if needed, but I'm away from my work computer at the moment. I'm using COMSOL to perform these studies, but that shouldn't make a difference.
Thanks!