Cylindrical coordinate system

Ahmed_20352
Ahmed_20352 Altair Community Member
edited October 2020 in Community Q&A

Hi,

 

Could anyone tell me what dof 1-6 correspond to when a cylindrical coordinate system is defined. The cylindrical coordinate has labels of r, t and z.

 

Thanks,

 

Ahmed

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Answers

  • Pranav Hari
    Pranav Hari Altair Community Member
    edited May 2019

    Hi Ahmed

     

    For Cylindrical Coordinates

     

    1 - Translation in the radial direction

    2 - Translation in thetha direction

    3 - Translation in the z-direction

    4 - Rotation in the radial direction

    5 - Rotation in thetha direction

    6 - Rotation in the z-direction

     

    For a cylindrical coordinate system a single unconstrained node can translate axially along Z, translate radially along R and swing circumferentially about θ. So to apply a constraint to Z and R will allow the point to move in θ only
     
    image.png
     

     

     

     

  • Ahmed_20352
    Ahmed_20352 Altair Community Member
    edited May 2019

    Hi Pranav, 

     

    Thank you for the clarification. So for example if I consider the same cylinder as you have shown in the figure and I want to enforce a displacement (as in rotate the cylinder) about z axis of 5 units should I define it in dof2 or dof3?

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