Hi Erik

Apologies I do not know how to reply to a comment.
This is for my research topic where I am testing the couplant interface between the transducer and metallic structure. So for this kind of testing, usually a high frequency is used (1MHz - 10MHz). The 5Mhz was determined using the dispersion curves (group velocity vs frequency). The wave form is a longitudinal mode so it will be propagating in the x-direction in the screenshots.
The reason for a large number of cycles is to ensure that no other modes will be present when the wave propagates through the rod.

The actual structure is a 6mm diameter steel rod. Is it easier to model with 3D instead of 2D?