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Mrhohoho

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Thread moved from the technical forums to the schoolwork forums

Hi! My team and i have been stuck in this school project for awhile. Been reading up a lot but can't find the answer.

We have been designing and rotating platform that is able to rotate a load of 2000kg. So the rotating platform would something similar to those car turntables where there would be caster wheels below it. We have made a few calculations but not so sure are we correct. The calculations are to determine what type of motor should we use. The diameter of the rotating platform is around 2m.

The time taken to turn one round is 30s and we calculated our angular velocity and angular acceleration using the formula (2 pi / T) and (w / t.) But based on my understanding, we have to calculate the moment of inertia which is 1/2mr^2 because we are assuming to be rotating a solid cylinder. From the moment of inertia, we calculate the torque required which is T = I * angular acceleration. Then Power = Torque * angular velocity. The power and torque required is quite low and we find it weird. I know there is rolling resistance but not so sure where to apply it.

However, we are not so sure whether that during constant speed, is there any calculation need to be done?

Hope the people here could help us as our project deadline is approaching...

We have been designing and rotating platform that is able to rotate a load of 2000kg. So the rotating platform would something similar to those car turntables where there would be caster wheels below it. We have made a few calculations but not so sure are we correct. The calculations are to determine what type of motor should we use. The diameter of the rotating platform is around 2m.

The time taken to turn one round is 30s and we calculated our angular velocity and angular acceleration using the formula (2 pi / T) and (w / t.) But based on my understanding, we have to calculate the moment of inertia which is 1/2mr^2 because we are assuming to be rotating a solid cylinder. From the moment of inertia, we calculate the torque required which is T = I * angular acceleration. Then Power = Torque * angular velocity. The power and torque required is quite low and we find it weird. I know there is rolling resistance but not so sure where to apply it.

However, we are not so sure whether that during constant speed, is there any calculation need to be done?

Hope the people here could help us as our project deadline is approaching...