Tutorial conclusion: Modal frequencies analysis

In this tutorial, you

• Created a modal frequencies study to determine the frequency of the first fundamental vibration mode of a tuning fork,

• Ran the analysis, identified the first fundamental vibration mode, and determined whether the prongs needed to be lengthened or shortened,

• Lengthened the prongs on the production model to lower the vibrating frequency, reran the analysis and confirmed that the natural frequency was 418 Hz,

• Determined the exact prong length required to produce the A4 musical pitch of 440 Hz, and calculated how much material needs to be ground off the ends of the rough tuning fork prongs to tune the pitch to 440 Hz.

  

  Original tuning fork vibrating frequency (left) and Modified tuning fork vibrating frequency (right).