- [Instructor] The traditional way of handling
multiple load cases in SolidWorks simulation
is to set up parallel analysis studies.
That means one analysis per load case.
We're going to show you this method in this video.
So, from the Analysis Study tab, here,
we select Copy Study
and then the form here
is saying what's the source study,
which is our con rod static analysis
and then it wants a new study name.
We're going to use the name: compression case.
The configuration we're going to use
means the geometric configuration
and again we've only got one, which is our default.
Again, our target study is a static analysis.
So, we check OK.
Now, we have a new study window: compression case.
This study is now stand-alone, the compression case
and it's separate completely from the original
con rod static analysis case.
So, it can work on this compression case
completely independently.
So, let's go back to the original study case, here.
What we're going to do is suppress the compression load
object, here.
We're going to unsuppress the tension load
and also the axle acceleration.
These two combined form our tension loading.
So, now we have two complimentary studies.
This is for the tension case with the two tension loads.
The study over here is for the compression case,
so that they're complimentary loading sets.
They share the same constraint at the big end,
so fixtures here; big end,
fixtures here;
big end.
So, now we can run these two analysis.
This is our result for the tension loading.
Now, we changed to the compression case study.
Just our compression load is active
and we can run this study.
So, here, I've got result for the compression case, before.
20,000 in this local region, here.
Let's go into the little end so we can see more clearly.
So, this is what's happening with the compression case.
We're squeezing the con rod and we can flip
to this study.
Again, we need to show
this result, here.
Again, we can see that the maximum stress
is in this region in here.
So, just flipping between these two,
again, we have to reinvoke the display, there.
We can see the result that's going on, there.
So, we can compare the two side-by-side.
Now, we can come to the window
and we can say: want a viewport with two views
and then the two views, now, we can select here
spacebar on the top view.
Standard view.
And this is looking at currently the compression case
and clicking to this viewport
con rod static
and select Standard View
show this result.
So, now we can see the result for the compression case
at the top, here, it's got the label up here.
And now we can see the result
for the con rod static analysis,
which is our tensile case.
We could have, perhaps, renamed that to be tensile case
and I can manipulate the two views independently.
So, again, here, let's go to the little end
which is our area of interest and see the result up here
and zoom in slightly
and then we can come down to the bottom view
which is our tensile case.
Let's look at the little end.
Again, we can manipulate that round.
So, we can kind of compare and contrast the two results.
The load in here, the bearing face, a load across here
at the ligament associated with that little end
Now, there is another way we can do this.
I go back to Window > Viewport
and just say Single View.
I'm back to my single view, here.
If I go to the Compare Results tab,
click on that, then I have a more sophisticated
dialogue box.
I can compare the results from the current study
or all studies in this configuration
and I've only got the two studies
for the default configuration, so I check the box, there
and now it's saying what quantities do I want to compare.
Now, I'm just going to use the Stress 1, vonMises
so I deselect all the others.
So, in the con rod static case,
which is our tensile load case
and then what I've called the compression case
and it can be comparing and contrasting
these two stress results.
So, now, if I click OK
I'll see two result views popping.
Now, at the moment the views are synchronized.
So, for example, if I come into the top view
and say little end
then both little ends come at the same time.
And again, if I spin this around
they will spin around in synchronization.
Now, I don't quite want to do that
so, let's click off synchronize,
because what I'd like to do is to zoom in to little end,
here.
Little end.
And have a view of those stress concentrations, there,
so let's zoom in
and down in the bottom view, again,
I want to go to the little end view
but I want to have a slightly different view
of where those stresses are.
So, again, a great way to compare and contrast the results
between two separate analysis.
Again, remember these aren't load cases,
they're two completely separate analysis
essentially doing two jobs.
Now, I can exit compare.
Now, I can go a little bit further than that.
Again, if I say compare results
at the moment, I've only compared one stress state.
Let's say we want to compare the vonMises stress
with, let's say, the displacement.
So, click on both of these.
Again, we're comparing across all the studies,
we've only got two.
Click OK.
And now we have a four-way split.
What we have is
comparison of vonMises stress across the two models
or the two-run analysis.
We also have a comparison of the displacement.
Now, again, emphasizing these are displacement contours.
They're not the display shape plot.
Again, just as an aside,
displacement contours can be very useful.
They can kind of indicate the general sense
of the displacement behavior.
Again, we can synchronize the views
or we can desynchronize them.
So, let's exit that.
Now, we're going to save the model
as baseline_13.
Again, we want to copy the result files across.
That means when we reopen that new database
it's going to have all the results we see already included.
If you want to keep the database size to a minimum
then you could click No but you have to rerun the analysis
then, so, again, depending on what you want to do
this could be very useful option.
So, here, I'm going to say: I do want to copy the results
across.
So, in conclusion, setting up parallel analysis studies
enables independent viewing of the results.
Using the Compare Results tool allows direct comparison
of the result's plots.
Now, the major drawback of this method
is that here we needed two separate analysis
and this could be expensive for a large model.
And some applications, for example Aerospace
there could be hundreds if not thousands
of load cases and that would mean
hundreds if not thousands of separate analysis
or analysis studies.
So, in that particular case the approach can start to get
unwieldy and there we would use the load case manager.