The Pair Acoustic-Structure Boundary coupling () is used to couple the Pressure Acoustics, Frequency Domain or the Pressure Acoustics, Transient interface to the Solid Mechanics interface in an assembly geometry where identity pairs have been created. This allows the use of non-confirming mesh at the acoustic-structure boundary. As the wave speeds differ in solids and fluids, the computational mesh can take advantage of this when resolving the waves. In this way saving degrees of freedom when solving.

This section defines the physics involved in the multiphysics coupling. The Acoustics and Structure lists include all applicable physics interfaces.