Hello and welcome to this.
What's new in Siemens NX video.
In this video, we're going to be taking a look at intelligence driven
design, using the all new Topology Optimizer and to take you through
the demo, let's hand over to Paul.
Well, here I am in my NX session, it's a managed session.
So I've got access to my, uh, Teamcenter database through active
workspace embedded inside of NX
and I've got some tasks to perform in my inbox.
Let's take a lookThe first one here is related to the gearbox
bracket that Ben's just mentioned.
We delve a little further down.
We can find out exactly the details of.the task and it's to use topology
optimization study to look at reducing both the weight and the
part count of the existing bracket.
Now, not only does it tell me what's required from me, but
also gives me the impacted items.
So if we take a look down here, you can see obviously one of the impacted
items would be the overall assembly.
And we can take a look at this in a bit more detail just by opening
this up directly inside of NX.
Let's take a look at some of the other impacted items.
Again, we'll just go back into our active workspace I'veselected notice
that the corresponding geometry in the NX session is highlighted.
So we have this cross program particularly useful to understand the impacted items
and where they fit within the assembly.
And again, if I want to get more of a level of detail, we can
open this up inside of NX as well
So you can see here the bracket and the gearbox again, let's just
open up the bracket now, as you can see from my assembly navigator,
there's 14 components currently.
So we're looking to reduce that.
And if we take a look at the weight, notice that the current
value is just over four kilos.
Now I've already got the start part of a topology optimization study done.
So it's just going to find that again.
If I go back into active workspace I'm going to do a search for it.
It is there.
And again, let's just open this up.
Now what we'll do here is to go through the process of setting
up the topology optimization.
So.
Again we start the optimization feature, open it up and we
have our own environment.
And one of the key things to remember about the optimization itself is that
it's now an NX feature, which means that if any of the geometry changes,
then your optimization feature.
will also change to reflect any of those modifications.
Now I'm going to perform a study.
So I'm going to edit this study.
Now there's a particular analysis type.
The objective I'm going to look for maximum stiffness.
I can modify the resolution of the results, again notice
that the optimization navigator updates to reflect that.
And I'm just going to hide now the original gearbox housing shaft and.
Original fabricated part.
Before I do that, the stages I'm going to go through is I
need to define a design space.
So this is a, this, this area or this volume, if you like is going to contain
the topology optimization study.
So let's just create the design space.
So again, a select the box, notice that it automatically picks
up on the material that's been predefined for that particular box.
It's an aluminium.
And now that's been added into my optimization.
Let's just hide some of these pieces of geometry.
We don't want to see at the moment.
So just hide that,and i now need to look at some construction bodies and these
construction bodies will contain geometry that you want to use as a keep out
it will also contain geometry, such as where the bracket needs to
be fixed both to both the chassis and also the gearbox itself.
So let's take a look, the construction bodies you can see here.
Okay.
There's, there's several different construction bodies and I'll
explain exactly what they do as we go through and create them.
So, first things first.
That's great.
The construction body.
I'm going to group these together.
So this one is going to be keep outs.
Okay.
And I'm going to specify these two solid bodies.
What I'm asking for there is I don't want to see any of the optimization
study encroach into that particular area.
I need that to be kept free of any geology, because that's basically
where the gearbox will be sitting.
Let me just remove those and now I'm left with construction bodies that are going
to define how, where the brackets fixed, both the chassis and also the gearbox.
And also the, we need to create some clearance for the, for the shaft.
So the gearbox can be dropped in to position.
So again, let's create some more construction bodies
again, we'll have another group
this one is going to be the base mounting holes, and I'm going to
select these four bodies here.
to define that And then we're going to create the fixings for
the, where the bracket is, is attached to the gearbox itself.
So this.
Yeah.
And again, grateful for these
and again, well, select these 12 solids here that define the gearbox,
the beat again, all in while you can see them being added to the navigator.
And then the final one is going to be the clearance for the shaft so again,
let's just call this shaft clearance
I'm going to give it a, an offset of 10 millimeters again,select the body could
see the offsets be applied and those are my construction bodies defined.
So the next stage would be to add some optimization constraints.
I could add some shape constraints, but in this case I don't need to.
So let's add optimization constraint and one in R apart from
obviously reducing the part count.
The other part of the study was to reduce the weight.
So I'm going to specify that I need this new bracket to be equal
to, or less than 2.75 kilograms.
I need some constraints.
So every topology optimization study would require some analysis constraints.
And I'm what I'm doing is I'm going to select these four faces here to be fixed.
Now there's a set number of load cases that I want to add, and I'm going
to specify for specific locations.
So, okay.
There's a default one, but I can just add another three very easily.
And I also want to add that fixed constraint into each
of the other sub cases.
And it's easy to do.
I can just literally just drag and drop into the subcase.
So final piece of the puzzle, if you like is to add some analysis loads.
Okay.
So I can specify a vector or a component in this case.
I want to, with the vector specify value, and now I need to attach
these loads to areas of the bracket.
So these fixing holes, for instance.
So again, I just pick on the faces attached to these loads,
to the one side of the bracket.
Um, And the other side of the bracket and I would do that for each of the sub
cases, different, slightly different modes, slightly different direction,
but it would be done for each one of the sub cases and then you utilize all of
these sub cases during the optimization.
study.
One, those were completed.
I would then go into the optimizer itself and start the optimization study.
Now this took around five or six minutes to do, I'm not going to do it here in
this live in this particular session, but I do have one that I've already
completed and you can take a look at that and let's remove the obstruction bodies.
That's bring back the gearbox housing and the shaft and bring back the one that I've
already completed and then you can see it.
So again,i've got that clearance that I set.
So I could bring the gearbox in Again i've got those keepout
areas as you noticed again.
So there's no geometry inside of here and I've got the construction bodies
that I used for base mounting holes, and the gearbox holes included in there
thanks for joining us in the next video, we're going to be taking a
look at integrated design simulation.
We hope you enjoyed the video and we'll see you in the next one.