Cylindrical coordinate system

Ahmed_20352

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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Pranav Hari

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

Ahmed_20352

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?