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Spherical Coordinates for Assembly

Spherical Coordinates for Assembly

Spherical Coordinates for Assembly

(OP)
Hi guys,

I am designing an upright for an open wheel racecar, and it has three plain spherical bearing connections.  These are where i am constraining the model for the analysis, and i am applying a remote load through the wheel bearings.

I have done this simulation in solidworks and it is a bit too basic in functionality and lets you constrain all 3 degrees of freedom in rotation and/or all 3 degrees of freedom in translation.  In solidworks, i would fix translation at all three bearings and the model would work.  I would apply the spherical constraints to the spherical face on the plain spherical bearings.  This generated boundary condition errors at the top upright mount, as it is actually free to move vertically.

Following this i have moved to ProE as i can do the same thing but constrain all 6 degrees of freedom at each bearing as i please.

But, it doesn't work.  Below is what  have tried.

spherical coordinates at the centre of the bearing and constraining all translations, and free rotations on the spherical surface.

Same again, but selecting all surfaces on the spherical bearing part.

creating a datum point at the same place as the spherical coordinate system, and applying the constraints above to it.  But it says that the constraint is not applied to a geometric part.

All i need is for this to work, i can get the top mount to translate vertically, but none of the parts will rotate at all.  In the pic below, i need the bit that is spherical to rotate, but it just won't happen.  I am hoping you guys can pinpoint my errors easily, and that i have fallen into a trap for youg players!  :)

Please lend a hand if you can.

Thanks for your help!



RE: Spherical Coordinates for Assembly

Scotty,

I'd recommend you post the question in forum828 : Pro/Mechanica. Once you've done it, red flag your post here so that the site managers can delete this post.

Also- try not to attach pictures to your post. Some folks still use dialup. Include a link and an estimate of the file size.

Cheers and good luck!

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