TriMech BLOGS - Software
Visualizing the Motion of a Disc with a SOLIDWORKS Motion Study
SOLIDWORKS Motion is a powerful software to help users visualize the motion of a design. This tool provides a graphical simulation that analyzes the impact of forces such as springs, dampers, gravity, and friction.
Anything that moves can be simulated in SOLIDWORKS Motion, just like a disc flying towards a basket! In today’s example, a motion study is developed to help understand how a disc golf shot may need to be adjusted to make it into the basket.
View transcript
SOLIDWORKS Motion is a great tool to help users visualize the motion within an assembly. This is also a great tool to help calculate some basic forces. In today's example, we're going to look at the motion behind a disc golf being thrown in the air towards a basket. We've set up the disc and the basket along a course, and we're going to launch the disc at a certain angle and velocity. We want to see if the disc makes contact or gets close enough to a certain point within the basket. So what we've done with SOLIDWORKS Motion is we've set up an assembly that has all our parts mated in place and everything defined in its starting position. Now, exploring further, we went through our study and identified some gravity. So we have gravity that's been called out and telling it what direction that force is acting in. We can also set up contacts. In this example, I have a contact here with the disc and the ground, and also the disc with one of these trees. It's the back tree here. And as the disc overshoots the target, it might make contact with this tree, and we'll see how that could ricochet off in another direction. We're able to set up contacts with different bodies in our assembly so that we know how they will interact with each other. With everything set up in place, we can come in here and start defining some initial properties, such as maybe our linear velocity and angular velocity. Here, I have it set up showing as if someone like me, a right-handed person, was to throw this disc. We could change which way we are pointing the angular velocity or even the linear velocity. For this example, we notice that we're launching the disc at 14 meters per second. Now, when we do that, we can see how this disc will interact with our target and how far it is at each point in the study. But what we're seeing here is that at 14 meters per second, when we launch this at whatever angle we've launched it at, it's coming close but not actually hitting the target the way we would like it to. So what we're going to do is we've already defined a study here, which once we run, we can click play and watch the study go through for as long as it takes the study to run. We can see the disc bouncing or ricocheting off of things. But in this example, we're not exactly, again, hitting the target as needed. So what we can do with SolidWorks is we have the capability to use design studies. What we're doing in a design study is calling out different ranges of values that we might want to test within our design. So here, we can tell SolidWorks if we have any goals that we might be shooting for. Maybe we want to, in terms of a linear static analysis, for example, maybe we have a part that holds a certain amount of stress, but we want to make this part more lightweight. We can come in here and say our constraint is that this part must maintain this much stress, but our goal is that we want to reduce the mass, by 15%. So we can come in here and set up our constraints, you know, whatever they are, and set up whatever our goals must be, what variables there are that need to be adjusted and tested through. So in this example for our design study, we have a launch angle for our disc, and that launch angle is going to vary between 24 to 27 degrees. We also have a launch speed. We saw the launch speed at 14 meters per second, and that wasn't getting close to the target the way we needed it the way we needed it to. So what we're going to do here is we're going to vary the launch angle between 24 and 27 degrees by step increments of one. And same thing with our launch speed, we're going to vary that between 15 to 17 meters per second, but again, with increments of one meter per second, as we're testing through those. After setting this up, we can click the run button. For this video, I set this up ahead of time. SolidWorks. SolidWorks will go through and test each of those different scenarios and give us the criteria that we're looking for. So here I told it 24 degrees at 15 meters per second. I want to be, well, my goal or criteria here to make this a successful study is that this disc needs to come within, as you see here, a half meter of a target that I set directly in the middle of the assembly here. If I show my chain sensor, which is where the sensor is built into and telling the software that if something comes within a half meter of that sensor based on whatever direction that sensor is facing, let's call that a successful study. And now that's what we're seeing here. SolidWorks went through and tested 24, 25, 26, 27 degrees, all of those at 15 meters per second. Nothing comes within the range that we're looking for. Now, when we go to 16 meters per second as a launching velocity, that seems to get us exactly what we're looking for. What we can tell by this is that we're almost spot on, or at least the closest we're getting in any of these scenarios is scenario seven, where we're launching this at 16 meters per second at 26 degrees as our launch angle. So let's take a look at what this might actually look like. We saw the first one that landed a bit earlier and was bounced into our target. I did not set up any contacts with the target so that we're not going to see the disc actually bouncing and ricocheting off of this. But what we can see here is how this is going to move and make sure that it is getting close to our target. We can see that I did do a good job of going straight through the target. And let's jump back to our motion study because now it should have updated our launch angle and our launch speed. We can see the path that it has taken here. We can also change our view here. So we can see how things are playing out in different angles. If we want to run things so that we can see how they're showing, we can do this in different speeds as well. I can come in and say, show me at a quarter of the time. I can come in and stop it at whatever point, go forward, go backwards, and really validate where this is going to be at each part of the design. We can now see that at this launch angle and speed, we are successfully able to hit our target. This is a great tool to allow users to see the motion within our design as well as calculate other basic forces within a study that could include anything like springs, motors, different values that we can apply and different values that we can get out of these studies as well. Hope this information helps the next time you jump into your motion analysis tool. Thanks for watching.