Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › What is the reason of Absorbtion Coefficient too small or zero on Impedance Tube Simulation? › Reply To: What is the reason of Absorbtion Coefficient too small or zero on Impedance Tube Simulation?
October 25, 2021 at 1:02 pm
ErKo
Ansys Employee
Hi
So only when we use JCA and Delany-Bazley perforated acoustic models (se engineering data, and theory manual) on an acoustic domain/body will it give some contribution and an acoustic absorption in these type of tests.
In ansys, elastic materials/structure do not account and contribute to the acoustic absorption so elastic structural bodies in a model will not affect the acoustic absorption (thus you can not do what you want since it does not account for that) - only the acoustic bodies that are assigned JCA or Delany-Bazley properties as I showed in the previous example will.
All the best
Erik
So only when we use JCA and Delany-Bazley perforated acoustic models (se engineering data, and theory manual) on an acoustic domain/body will it give some contribution and an acoustic absorption in these type of tests.
In ansys, elastic materials/structure do not account and contribute to the acoustic absorption so elastic structural bodies in a model will not affect the acoustic absorption (thus you can not do what you want since it does not account for that) - only the acoustic bodies that are assigned JCA or Delany-Bazley properties as I showed in the previous example will.
All the best
Erik
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