Acoustic interface elements

Acoustic interface elements:

  • can be used to couple a model of an acoustic fluid to a structural model containing continuum or structural elements;

  • couple the accelerations of the surface of the structural model to the pressure in the acoustic medium;

  • can be used in dynamic and steady-state dynamic procedures;

  • must be defined with the nodes shared by the acoustic elements and the structural (or solid) elements;

  • can be used only in small-displacement simulations and are not intended for use in nonlinear or hydrostatic fluid-structure interactions;

  • are ignored in eigenfrequency extraction analyses if the subspace iteration eigensolver is used; and

  • if necessary, can be degenerated into triangular elements.

For most problems the surface-based, structural-acoustic capabilities described in Mesh tie constraints and in Defining tied contact in Abaqus/Standard provide more general and easy to use methods for modeling the interaction between an acoustic fluid and a structure. User-specified acoustic interface elements give you increased control over the coupling specification, at the expense of the convenience of the surface-based procedures.

The following topics are discussed:

Related Topics
Acoustic interface element library
In Other Guides
Acoustic, shock, and coupled acoustic-structural analysis
Creating acoustic interface sections