0 Replies Latest reply on Feb 9, 2016 5:00 PM by Alessandro Tornincasa

    Shaft response when rotating at critical speed

    Alessandro Tornincasa

      Hi,

      would like to simulate shaft response when it's rotating at critical speed.

      A frequency analysis will give you mode shapes and associated frequencies:

      Cattura.PNG

      Now suppose you want to know shaft displacement when roating at a speed coinciding with resonant frequency.

      You could do this by creating a harmonic analysis.

       

      I've tried to prescribe a uniform base excitation in the form of rotating speed, therefore I've selected a cylindrical face in order to switch to a cylindrical cordinate system and prescibe a tangential velocity. When doing this simulation issues this error:

      Cattura2.PNG

       

      How could you find out displacement when shaft rotates at a speed coinciding with resonant frequency given that the only known info is rotating speed ?

       

      I'm attaching the shaft with frequency and dynamic study for your reference.

      Thanks,

       

      Alex