Cylindrical Rigid joint tolerance

[konris87]

Greetings,

I am using a cylindrical joint to connect two rigid bodies A and B. The maximum rotation that the joint allows is about 80 degrees, even if I prescribe a rotation angle of 100 degrees. After the ~80 deg barrier the solution doesn't converge because tha angular tolerance is not satisfied. Reading the user manual I could not clearly understand what is the description and role of the angtol parameter. Could you please explain it a little more or provide an example?

Best regards,
Kostas

[ateshian]

Hi Kostas,

angtol refers to the maximum angle (radians) allowed between the axis of rotation on rigid body A and that on rigid body B. A tight tolerance would be e.g., angtol=0.001.

When using rigid connectors, make sure that auto penalty is turned on. A good initial value for the force and moment penalty factors is 1000, then auto penalty will take care of increasing that value as needed.

Best,

Gerard