Hello Everyone,

In my acoustic analysis, I created an element-based surface for ASI (asi3d3) elements and applied velocity boundary conditions (x, y, z) to all nodes of these ASI elements. Additionally, I created an element-based surface for the acoustic cavity (ac3d4) elements and used a Tie constraint to link the ASI elements with the acoustic cavity. I then ran a steady-state dynamic (SSD) analysis to obtain the sound pressure in the acoustic cavity.

The element-based surface for the ASI elements is named STR_ACOU. However, I encountered the following error:
"NO SURFACE FACETS ARE GENERATED FOR SURFACE STR_ACOU."

Does anyone know how to resolve this error? Thank you in advance for your help!