Learning Forum

[veronique.bouvette.1]

 

Hi everyone! I've been trying to assign a prescribed motion directly to my model’s center of mass, but I'm running into some challenges. Currently, I’m using a node at (0,0,0), which isn't perfectly aligned with the actual center of mass. I set up this node as part of a rigid body to drive other rigid parts in the simulation, but I'd like to accurately define this node as the model's true center of mass.

I’ve tried measuring the model’s center of mass and manually adjusting the node’s coordinates accordingly, but I’m still noticing a slight asymmetry in the model’s response. I suspect this may be due to the small misalignment between the manually defined node and the actual center of mass. Is there a more precise way to position the node exactly at the model’s center of mass, or perhaps a way to have LS-PREPOST automatically calculate this? Thanks for any suggestions!

[ytian]

You can use *PART_INERTIA to define the mass center and the properties.