- [Instructor] Now in the previous video,
we simplified the beam geometry and we setup a set of points
to be able to apply the loads.
So now we'll carry on and create the study.
So Simulation, New Study,
and we're going to call this I Beam
and it's going to be a static analysis,
so we just check OK.
Now we want to apply material to this,
so we Apply Edit Material,
and we're going to use the default alloy steel.
So Apply and then we close.
Now at the moment the icon is indicating
this will be treated as solid geometry,
so if we mesh we'd create solid elements.
We want to change that action and say,
Treat as a Beam.
You can see the icon changes and we know
from our previous work, that's a beam icon.
Let's go in and review that.
So edit the definition.
We can see indeed it's being treated as a beam.
Here's end one which is on the right-hand side,
and two on the left-hand side.
Now that's quite important because it defines
the coordinate system for all the elements
which we created in this beam section.
We can also show the beam directions,
and this is indicating direction one, is downwards,
in the negative-y system sense.
Direction two is lateral,
in the negative-x system sense.
And then the final axial direction again
is running from the right-hand end to the left-hand end.
We check OK.
Now because we've defined this as a beam section,
we have a joint group and that's defining the joint here,
and the joint here.
So let's right mouse-click on this and Edit,
and then joint one is highlighted
and joint two is highlighted.
Again it's useful to remember the sense,
running from one to two,
which confirms the orientation of the beam section
and hence all the beam elements.
You can also check the neutral axis,
which should be running down the center of the beam.
You can also display the sheer center.
If we have a thin section such as a channel section,
then we could get an offset between the neutral axis
and the sheer center.
In our particular case we're a symmetric structure,
we're not going to see that.
They're both aligned,
so we just close that out.
Now we want to apply the constraints to this system,
so we come to Fixtures, Fixed Geometry.
Now we're going to Use Reference Geometry.
Notice I can select at the joints,
so now the constraints are going to be applied
in a beam type of structure, at the joints.
So our two joints we want to apply the constraints to
are this left-hand and the right-hand joints.
Now the reference geometry I'm going to use,
if we expand the geometry tree here,
I'm going to use the right plane.
Now everything is relative to that.
So the three translations I want to pick
that's going to apply simply supported,
with three translations.
Now I need to think carefully about the rotation
so at the moment, it looks like it's okay,
simply supported at both ends.
But in fact there's a system
with your body degree of freedom,
there's nothing stopping this model spinning
about the system,
so that axis spinning about this axis.
So I need to stop that rotation.
I can conveniently do it at both ends.
I only need to do it one, but both will be fine.
So that's going to be running in direction one
in my system here.
So direction one, long plane direction one.
That's the one I select there,
so now I can check OK.
Now we come to the external loads,
I'm going to be applying forces.
I want to apply loads at vertices or points
that I define.
This is why I set up those points beforehand.
If I choose joints,
I only have the ability to choose this joint, or this joint,
and unless I'm applying some kind of end moment,
it wouldn't make sense here.
So my loads are going to be applied
through these internal points.
so I come back to the points here, pick,
first off, the vertical loading.
So if I zoom in here, close down the geometry tree,
I want to pick this point and this point.
So point one and point three.
Now I need to define my reference geometry.
So again we can use the right plane
and now I want to apply in direction two,
in the right plan sense.
I want a total of 10,000 so I'm going to do 5,000 each,
and we can see the direction is defined as downwards
in this particular case.
I've actually got the reverse direction clicked on.
So check OK then I can change this to vertical
just so we keep tabs on what's happening.
And we want the other loading
which is going to be a horizontal load so again,
we define force, .2 and .4.
Going to use the same datum plane, the right plane,
and then my sense now is going to be along that plane.
I want them to be loaded axially.
So again I have two of them so 5,000 each,
and now my direction's running from right to left.
So 5,000 times two should give me the total value there.
We check OK so there's my two sets of loads,
which are being applied vertical at the center span,
and horizontal in this offset position here.
Let's come back to a side view of the beam.
Now we can mesh so I can say create the mesh,
and I've used the default number of elements
down the length here.
Now at the moment the visualization's not very helpful,
it's just a circular cross-section,
which is the default visualization.
I come down to mesh though.
I can say render the beam profiles.
So we click on that.
Now we're all set, ready to run the analysis.
So we'll pause the video there and in the next video,
we'll pick up, run the analysis,
and look at the results coming out.