The Acoustic-Shell Interaction, Transient multiphysics interface (
), found under the
Acoustics>Acoustic-Structure Interaction branch (
) when adding a physics interface, combines features from the Pressure Acoustics, Transient and Shell interfaces to connect the acoustics pressure variations in the fluid domain with the structural deformation of a shell boundary. It may for example be used for determining the transmission of sound through a thin elastic structure such as a car hood and analyzing the vibroacoustics of loudspeaker cone.
When a predefined Acoustic-Shell Interaction, Transient interface is added from the
Acoustics>Acoustic-Structure Interaction branch of the
Model Wizard or the
Add Physics windows, the
Pressure Acoustics, Transient and
Shell interfaces are added to the Model Builder.
In addition, the Multiphysics Couplings node is added, which automatically includes the
Acoustic-Structure Boundary multiphysics coupling.
When a predefined multiphysics interface is used, for example Acoustic-Shell Interaction, Transient, the
Selection on the multiphysics coupling is automatically set to
All boundaries. In this way, the multiphysics coupling is automatically active on all
Shell boundaries with
Pressure Acoustics, Transient on one side or both sides.
For example, if single Shell and
Pressure Acoustics, Transient interfaces are added, COMSOL Multiphysics adds an empty
Multiphysics Couplings node. You can choose the available multiphysics couplings, but you need manually to select on which boundaries they need to be applied, or select
All boundaries to recover the predefined behavior.
The Acoustic-Structure Boundary multiphysics coupling is described in the
Multiphysics Couplings chapter.
Physics nodes are available from the Physics ribbon toolbar (Windows users),
Physics context menu (Mac or Linux users), or right-click to access the context menu (all users).