At any given ultrasonic transducer company there is usually an FEA guru who, consequently, is often the ultrasonic expert on the team.

FEA simulation can be readily made in to a process by which it can be taught to others, thereby increasing the bandwidth of the product development team.

It takes a huge amount of time to make proper written instructions. However, I would suggest that you use screen recording to document the process by which your team's expert creates simulations for instructional purposes.

Windows OS has a really easy method of screen recording. Simply press Win+Alt+R, and a recording will start. The rest is pretty intuitive.