Reply To: Ultrasonic horn gain analysis

[peteroznewman]

With the Displacement BC in Modal, what shape was the first mode? Was it axial or was it bending or torsion? It's possible that the first mode was a bending mode, while the axial mode was at a higher frequency.  You want to look at the Harmonic Response near the frequency of the axial mode.

I see you created two Directional Deformation results in the Modal analysis. Did you try doing the Free-Free Modal (delete the Displacement BC)?  Did you find which mode had axial (not bending or torsion) vibration?  For the axial mode, what was the ratio of the deformations?  Just curious to compare that ratio with the peak amplitude of the Harmonic Response.