Ansys Acoustics as Understood by Structural Engineer
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- Опубликовано: 11 сен 2024
- Why acoustics simulation and how to make use of acoustic simulation results to refine product design ?
Understating Finite Element formulation of Acoustic Equations in structural analysist point of view
Ansys acoustic elements
Meshing considerations for structural and acoustics domains
Acoustics boundary conditions
Understanding Complex Impedance boundary conditions
Understanding Radiation boundary conditions
Mesh termination of large / open acoustic domains
Excitation sources
Using CFD results as excitation sources
Material modeling
Continues Medium such as air / water
Porous medium such as foams or micro perforated plate (MPP)
When to consider fluid viscosity?
Understanding acoustic modes and making use of Modal acoustic analysis Results
One way & Two way Vibro-Acoustic simulation
Random acoustic diffuse sound field analysis
Time domain transient acoustic simulation
Acoustic simulation post processing and results interpretations
Near filed and far field results
Contour and Graph results
Application discussion
Silencer / muffler
Sound radiation due to vibrating structures
Frequency shift due to Doppler effect of moving source
Take always :
How to set up acoustic simulation efficiently ?
How to make use of acoustic simulation results to refine product design ? and
Where to find more examples and workshops, further reading materials.
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The quality of sound of an acoustic video must be superior
Although thanks for sharing
Hello Santhosh,
First of all, thanks for the presentation! Just brilliant! I’m currently getting into Ansys Acoustics in more depth to solve some muffler and enclosure problems and this will help a great deal!
Btw, is the pdf shared somewhere? Or would you be willing to share it otherwise?
Best regards!
Hello Santosh, are the examples in ansys help manual only available in APDL versions? are there workbench version of the same examples. I could not locate them in search.
Need help sir!!!!!! how can I contact you ??????
Great Job sir...
Hi Santhosh sir... how can I contact you??? I am performing modal and harmonic analysis of a dam structure using an acoustic medium on the upstream face. Need help...
Hi Santhosh, very impressive presentation. The audio has a little bit low volume. It's possible to have a pdf version of the presentation? I need to prepare a ansys acoustic training course in Italian and your presentation is the best one I can find all around the web. Thanks Michele
Thanks. May I know your background and why r u preparing Ansys Acoustic training course ?
How can I contact with you for a short chat?
I am doing dynamic analysis of concrete dam with reservoir as acoustic medium. can anyone help me with the boundary conditions???
Hi, sir, thanks for sharing. For a duct with rigid-rigid end conditions, is the element size smaller the better? I used a smaller element size, but the frequency response and sound pressure were different from the normal elemet size.
By making element size small and small, frequency should go more towards analytical value by hand calculation.
@@SanthoshKumar-ge9sq Thanks. I use two different element sizes, but one of them seems to be wrong. I've recorded the video, can you give me some advice?
ruclips.net/video/bBhIo8iuqRA/видео.html
@@xuewenzhang2811 I don't understand what u r trying to do, sorry. Please contact your Ansys support.
Hello sir can you pls make video on acoustic absorption coefficient calculation for porous absorber using ansys acoustics
You already have to have a detailed material model to be able to do that, Delany-Bazley, JCA or similar. If so, then you can set up an impedance tube simulation. Basically, an open-closed tube with the absorber attached to the closed (rigid) end. As for boundary conditions; rigid wall bc on cylindrical surface and radiation boundary at inlet. Probe acoustic pressures at distance x1 and x2 away from the absorber. The absorption coefficient can then be calculated by the following expression:
alpha = 1 - |R|^2,
where R is the reflection coefficient given by:
(H12 - e^(jk(x2-x1)) / e^(jk(x2-x1))* e^(2jk(x2-x1)
H12 = P(x1)/P(x2) -> (complex fft’s)
What you effectively measure is how large the incident wave is relative to the reflected wave.
Please can you provide workshop tutorials .pdf
How to give trim element for perforation
ruclips.net/video/umHEM7dESeU/видео.html
@@SanthoshKumar-ge9sq Thanks for your response sir, your tutorials are really helpful, also can you make one video for complete muffler modelling for sound transmission loss of a muffler with perforation pipe, baffles/ plug type muffler any of one...It would be really very helpful.
@@SanthoshKumar-ge9sq hi, just want to know at what frequency we should calculate the wave number because it is frequency dependent and we need to get the result fupto 1500-2000hz so what would be the correct way of calculating this?
I want to calculate the sound absorption coefficient (two microphone impedance test tube), from one side I have applied mass source (1 unit) and on another side, I have to apply radiation boundary condition/Perfectly matched layer. (at inlet only mass source ).