When an acoustics interface and a structural mechanics interface are added to the same model, a Multiphysics node will appear if there is a predefined coupling between the two interfaces. Under the Multiphysics node you can add the predefined multiphysics couplings that couple the fluid domain and to the solid domain. The couplings are described in detail in the Multiphysics Couplings chapter.

You can also find a set of predefined multiphysics interface that will automatically set up the involved single physics and the multiphysics coupling. These are described in the Acoustic–Structure Interaction Interfaces chapter. Here you will also find modeling tips for acoustic–structure interaction problems in the Modeling with the Acoustic–Structure Interaction Branch section.