Acoustic analysis

- March 28, 2020 at 9:44 am
  
  Surya
  Subscriber
  
  Hi
  
  I want to perform a acoustic modal analysis on a 2D area jump geometry (similar to backward facing step) for my student project to determine the eigen frequencies of the geometry. Later I want to extend this simulation by exciting the same geometry with an incident pressure pulse and analyse its response. In Ansys workbench, I found three different components: Harmonic acoustics, Modal acoustics and static acoustics. I am new to workbench and I am unable to differentiate them. Could you please explain the differences among the three mentioned products so that I can choose the correct product for my application?
  
  Thank you
  
  Regards
  
  Surya
- March 28, 2020 at 7:24 pm
  
  peteroznewman
  Subscriber
  
  Modal acoustics will provide you the eigen frequencies of the fluid geometry.
  
  Harmonic acoustics is when you have a source with a sinusoidal output. The load is specified as an amplitude of the sinusoid. The analysis sweeps the frequency of the source over a specified range and you can see the amplitude and phase response in any part of the space.
  
  Transient Structural is needed to see a single pressure pulse travel through the fluid.