The Acoustic-Solid Interaction, Transient multiphysics interface (
), found under the
Acoustics>Acoustic-Structure Interaction branch (
) when adding a physics interface, combines the Pressure Acoustics, Transient and Solid Mechanics interfaces to connect the acoustics pressure variations in the fluid domain with the structural deformation in the solid domain. It can, for example, be used to determine the transmission of sound through an elastic structure or solve for the coupled vibroacoustics phenomena present in a loudspeaker.
When a predefined Acoustic-Solid 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
Solid Mechanics 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 the predefined multiphysics interface is used, the Selection on the multiphysics coupling is automatically set to
All boundaries. In this way, the multiphysics coupling is automatically active on all boundaries with
Pressure Acoustics, Transient on one side and
Solid Mechanics on the other.
For example, if the single 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).