PAFEC-VibroAcoustics - 3D Transient analysis of a rectangular horn

The example below shows results of a 3D transient analysis of a rectangular horn. The mouth of the horn is mounted in an infinite rigid baffle. The piston at the throat has a single pulse prescribed as the displacement history.

The planes of symmetry (X = 0 and Y = 0 ) have been utilised to reduce the model size. Acoustic finite elements model the air inside the horn and extend out to a spherical surface. Wave envelope elements then model the remainder of the half space.

This model is a specially created illustrative example, it is not a commercially available horn.

Axial displacemnt at horn throat v time

Pressure on axis at horn throat (node 1) v time.

Pressure on axis at node 2 v time.

Pressure on axis at node 3 v time.

Pressure on axis at horn mouth (node 4) v time.

Pressure on axis at node 5 v time.

Pressure on axis at FE/WEE interface (node 6) v time.

(Note: contains an animated file, may take a while to download)