RFORCE - acceleration

Enrico_20294
Enrico_20294 Altair Community Member
edited November 2020 in Community Q&A

Hello,

I have a problem with a linear static analysis with Optistruct; I have to evaluate shear tension on a rotating cylinder with angular acceleration.

I've completed the tutorial on the rotating disc; I've also add angular acceleration in RACC field of RFORCE and results are in accordance with analytical formulas.

 

My problem consist in the evaluation of stress in a rotating cylinder (without the central hole) with angular acceleration. I have no problem if RACC =0 and non-zero angular velocity; however, when I add angular acceleration, resultant displacements are very high and stress very low. Did I commit any errors in constraints definition?

 

I constrained DOF 1 2 3 of nodes belonging to the axis of the cylinder.

Thank you so much for your attention

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Hi Enrico,

     

    I think it looks reasonable since angular acceleration is proportional to Omega^2. 

     

     

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