Ansys Acoustics – Connect Coupled Field Modal to Response Spectrum

- January 29, 2024 at 11:08 am
  
  Sandra Palitzsch
  Subscriber
  
  Hello everyone, I am new to the acoustic analysis systems in Ansys. I am currently using the workshops provided by ANSYS, but I have problems completing workshop 10 (title: Response Spectrum). The workshops are under the use of the "Acoustics" extension. My version (2023 R2) does not support this extension.
  I am able to get the modal results of the system, but I cannot use those results for my response spectrum analysis (Modal Environment: None Available, see picture below). I always get the warning "Modal analysis is a pre-requisite for the current analysis".
  Which settings are necessary, to use the modal results for the response spectrum. Or is there another way to get the response spectrum of an acoustic system?
  I hope you can help me.
- January 29, 2024 at 1:00 pm
  
  Erik Kostson
  Ansys Employee
  
  Hi
  As you found out you can not link the two. Response Spectrum links only to pure structural Modal Analysis system only (see here: https://simutechgroup.com/apdl-commands-objects-mechanical-after-response-spectrum-analysis/)
  (So Response Spectrum can not be linked to coupled field modal and modal acoustic systems).
  In general we can not do any mode super position harmonic and response spectrum in Workbench when an acoustic region is present.
  This is documented and explained in the help manual.
  All the best
  Erik