26.14.2 Acoustic interface element library

Products: ABAQUS/Standard  ABAQUS/CAE  

References

Element types

Element for general use

ASI11-node

Active degrees of freedom

1, 2, 3, 8

Additional solution variables

None.

Elements for use in planar models

ASI2D22-node linear
ASI2D33-node quadratic

Active degrees of freedom

1, 2, 8

Additional solution variables

None.

Elements for use in 3-D models

ASI3D33-node linear
ASI3D44-node linear
ASI3D66-node quadratic
ASI3D88-node quadratic

Active degrees of freedom

1, 2, 3, 8

Additional solution variables

None.

Elements for use in axisymmetric models

ASIAX22-node linear
ASIAX33-node quadratic

Active degrees of freedom

1, 2, 8

Additional solution variables

None.

Nodal coordinates required

General use element: None.

Planar: X, Y

3-D: X, Y, Z

Axisymmetric: r, z

Element property definition

For general-use elements, you must define the element's surface area and the direction cosines of the normal to the acoustic fluid-structural interface, pointing into the fluid.

For elements for use in planar models, you must specify the thickness (out-of-plane) of the element. The default is unit thickness if no thickness is specified.

For elements for use in three-dimensional and axisymmetric models, no additional data are required.

Input File Usage:           
*INTERFACE

ABAQUS/CAE Usage: 

Property module: Create Section: select Other as the section Category and Acoustic interface as the section Type


General-use acoustic interface sections are not supported in ABAQUS/CAE.

Element-based loading

Distributed impedances cannot be applied.

Element output

None.

Node ordering on elements

Planar

3-D

Axisymmetric