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  • Natural Frequency through a gearbox

    Discussion in 'Calculations' started by Xye, Aug 15, 2013.

    1. Xye

      Xye New Member

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      I have a system with two torsion and two gears. the ends of the torsion bars are secured and the gears link the two torsion bars together. I am trying to calculate the natural frequency of the system but have thus far been unable to wrap my brain around the maths to solve the problem.

      I have managed to reduce it to two individual spring mass systems linked by a lever but am still unable to come up with a suitable way to describe this mathematically.
       
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    3. mechaboy

      mechaboy Active Member

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      hi
      the only way that i can suggest is modular analysis by a FEA software like ANSYS.
      good luck!
       
    4. goldtooth

      goldtooth Member

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      Look at the topic of natural frequency for rotating discs. You will have to work out equations of motion for your system, then plug them into a matrix form, then find the determinent which will give you whats called a characteristic equation (one which uses eigen values and eigen vectors).
       

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