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Stability of rotating axles

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  1. Mar 24, 2012 #1
    Does anyone know the theory behind rotational stability of a (long, thin) axle? I would like to know the maximum allowable rotational speed of a 5 meter long axle. I suppose its something in line with the theory of column stability, but I can't find anything about it.

    I have made a FEM analysis in Solidworks, but I have no idea how its computed and whether its reliable. So I would like a verify it with an analytic calculation to compare.

    Can anyone guide me in the right direction I would appreciate it very much.

    Thanks

    Kaj
     
  2. jcsd
  3. Mar 24, 2012 #2

    AlephZero

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    The key words are "shaft whirling" and "critical speeds".

    If your software can analyze this, there will almost certainly be a special solution procedure for it. Any results that you might get from a non-rotating buckling analysis will be meaningless.
     
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