This example problem uses acoustic elements and viscothermal losses (comparing a boundary layer impedance [BLI] model and a low reduced frequency [LRF] model) to analyze the noise-reduction of sound-absorbing trim panels with quarter-wave resonators.

This example is simulated using the Ansys Mechanical Application. To see this example solved with Ansys Mechanical APDL see Acoustic Analysis of a Viscothermal Resonator in the Technology Showcase: Example Problems.

The resonator has several tube sections with small dimension compared to the acoustic wavelength, so a viscothermal acoustic formulation is needed. In this example, the following viscothermal formulations are demonstrated:

Overview