Buoyancy term in SimMechancis

Hey,

I am new to SimMechancis, so the solution is probably very straight-forward...

I am modelling a mooring system for a wave energy converter (e.g. Weptos, check: https://www.youtube.com/watch?v=2_JSZaAgCUw) and so I would need the whole system to be submerged => to have buoyancy.

I don't think that it is possibly to submit the whole system to a buoyancy term (as it is in function of the volume of the members), so I could do it individually for each main item. However, this force needs to stay vertical, which I don't manage to do. So far, the force is always in line with the object... I have left the subsystem "open" from the buoy in the illustration, any idea how it should be done?

Thank you in advance!

Arthur

Answer 1

[Steve Miller]

The External Force and Torque block has a setting, "Force Resolution Frame". Set it to "World" to always apply the force along the world axes. The buoyancy term would normally be applied along the z-axis.

--Steve