- [Instructor] In this video, we're
going to complete the truss weldment
and apply loads and band conditions
and then run the analysis and check the results.
I'll right mouse click on the joint group
and edit and we can see three joints are being created.
All the beams are selected.
The definition for finding joints.
Our objects are touching each other.
If they weren't quite touching,
we could set a tolerance within
which the ends of the members would be grabbed
and created as a joint.
Everything is fine here, so we calculate
and I'll just update the joints.
We can click OK. Joints are being recalculated.
But the order may have changed.
Just a minor warning message.
I'll want to ply our constraints
so we right mouse click on Fixtures,
choose Fixed Geometry,
and then using the joints to highlight
we pick this bottom joint, left hand side
bottom joint, right hand side.
We've chosen a Fixed Geometry and we just check OK.
So now we need to just constrain this top joint
and stop it moving out of plane, in the Z sense.
So again, we go to Fixtures,
right mouse click, go for Fixed Geometry,
and this time we choose Use Reference Plane
where we can select what degrees of freedom we want to use.
So I choose the top joint, here.
The Reference Geometry, I want to use.
Easiest way is to use the plane.
If we use the Front Plane, here.
And then, everything is relative to the front plane.
I want to constrain out of plane or normal to the plane.
Check that. Check OK.
Now, right mouse click on external loads
and we're going to apply a force.
Get in the joint at which we want to apply the force to.
Highlight that. It is the top joint, here.
We can pick that front plane, again.
And along the direction which will be the model X axis,
you're going to choose 10,000
in units correcting pounds force.
Vertically, which is in the model Y direction,
again we choose 10,000 pound force. Click OK.
And we right mouse click on mesh.
And we can mesh and run.
See the results have come through.
Let's close down the auto feature tree.
Right mouse click on Stress 1
and let's edit the definition.
It's actually at the moment set to
upper bound axial stress and bending stress
which has no meaning for a truss.
So we're going to change that to axial. Click OK.
And we see very similar stresses.
These compare exactly with the benchmark.
We can select Plot Tools, Probe.
And we can pick the two truss elements.
Again, we can see exactly what those values are
and they agree with the benchmark.
So the model and its performance
is exactly the same as the previous video.
The only difference is we've used a weldment gradient
rather than coming from solid geometry.
So I'll leave you to check
the displacements, forces, and reactions.
They should all now be identical to the benchmark.
So we'll save this file and we'll save it as layout end.
So in summary, in this video we've seen
how to create the truss elements from weldments
rather than using geometry.