Could you please make video on Capacitive micromachined ultrasonic transducer? I have circular membrane and want to apply prestressed harmonic analysis. In static analysis, I have to use DC voltage below collapse voltage and in harmonic analysis small signal AC voltage. Then I want to apply acoustic medium. I have done prestressed harmonic analysis but facing problem in acoustic part. To apply DC voltage and AC voltagr on cmut I have used EM Transducer (TRANS126) element.
Is there a relationship between the frequency values used in the harmonic response and acoustic? Why did you use different values? Shouldn't you use the same values?
The frequency range for the harmonic response does not have to be identical to the acoustic frequency range. They each compute the response independently.
In Structural Harmonic Response, I used 300 - 900 Hz forcing frequencies of the force at the tip. In the Acoustic Harmonic Response, I requested the solution sweep from 400 - 800 Hz.
Hi Peter, When you say you would slice up the mesh for more accurate results, what procedures would you use to do this? I am having issues with a large acoustic domain and small mechanical components that are enclosed
Hi Nate, At 4:15 I say I could slice up the solid to make an efficient mesh. That means using fewer nodes and elements. The mesh I used is accurate. The requirement is to use 6 quadratic (or 12 linear) elements for one wavelength of the sound. A 600 Hz tone has a wavelength of 345 m/s divided by 600 /s = 0.575 m So divide that by 6 to get a maximum element size of about 0.1 m or 100 mm. In hindsight, it would have been more accurate to move the domain boundary out a few wavelengths; 20 mm was too close to the tuning fork. If you want help with your model, please become a member of the ANSYS Student Community and create a New Discussion to ask your question. studentcommunity.ansys.com/
It just gives a nice clean mesh on the forks. You can get a very good result without splitting it into three bodies. There are limits on the number of nodes allowed to solve on the free Student license: Nodes < 32,000 so efficient hex meshes keep the node count low.
Sir, could you please make a video on performing modal analysis of structures under water? I don't find any tutorials for that kind of problem.
Could you please make video on Capacitive micromachined ultrasonic transducer? I have circular membrane and want to apply prestressed harmonic analysis. In static analysis, I have to use DC voltage below collapse voltage and in harmonic analysis small signal AC voltage. Then I want to apply acoustic medium. I have done prestressed harmonic analysis but facing problem in acoustic part.
To apply DC voltage and AC voltagr on cmut I have used EM Transducer (TRANS126) element.
Is there a relationship between the frequency values used in the harmonic response and acoustic? Why did you use different values? Shouldn't you use the same values?
The frequency range for the harmonic response does not have to be identical to the acoustic frequency range. They each compute the response independently.
thaks for video ı got a question 'frequencies
value that was used in harmonic response and harmonic acoustic' are they equal ?
In Structural Harmonic Response, I used 300 - 900 Hz forcing frequencies of the force at the tip. In the Acoustic Harmonic Response, I requested the solution sweep from 400 - 800 Hz.
Hi Peter,
When you say you would slice up the mesh for more accurate results, what procedures would you use to do this? I am having issues with a large acoustic domain and small mechanical components that are enclosed
Hi Nate,
At 4:15 I say I could slice up the solid to make an efficient mesh. That means using fewer nodes and elements. The mesh I used is accurate. The requirement is to use 6 quadratic (or 12 linear) elements for one wavelength of the sound. A 600 Hz tone has a wavelength of 345 m/s divided by 600 /s = 0.575 m So divide that by 6 to get a maximum element size of about 0.1 m or 100 mm. In hindsight, it would have been more accurate to move the domain boundary out a few wavelengths; 20 mm was too close to the tuning fork.
If you want help with your model, please become a member of the ANSYS Student Community and create a New Discussion to ask your question. studentcommunity.ansys.com/
What is the reason to split the tuning fork into three bodies? Thanks
It just gives a nice clean mesh on the forks. You can get a very good result without splitting it into three bodies. There are limits on the number of nodes allowed to solve on the free Student license: Nodes < 32,000 so efficient hex meshes keep the node count low.