July 27, 2022 at 1:43 pmvinnakbmSubscriber
In CFX, can a rigid body motion be defined about an axis not passing through the center of mass? In my simulation the lever center of mass is different from its pivot point. Any help is appreciated!! Thank you
August 1, 2022 at 10:55 pmSurya DebAnsys Employee
Yes. You can create your own coordinate system and then use that as your "Coordinate Frame" for the Immersed Solid/Rigid Body Solution. You can then specify the moment of inertias about this system.
August 2, 2022 at 2:39 amvinnakbmSubscriber
Thank you for your response Surya. In the documentation, I found that the rigid body coordinate frame must be placed at the center of mass. I created my global coordinate frame at the pivot (same orientaion as the rigid body coordinate frame but Y axis translated by a certain amount). So, should I specify the mass moment of intertia about global axes instead of center of mass? Also, in the "Dynamics tab", the documentation states that the rotational degrees of freedom have to specified w.r.t. a coordinate frame
• Has the same initial orientation as the rigid body coordinate frame
• Has its origin at the rigid body center of mass
• Moves rigidly with the rigid body
How can these conditions be satisfied even I specify the mass moment of inertia about the global axis?
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