Calculate Torque/Power for Rotating Tube & Rectangular Parallelepiped

In summary, the conversation discusses calculating the torque and power needed to rotate a construction consisting of a tube and a rectangular parallelepiped on top. The dimensions and masses of each component are provided, but the angular velocity is not given. The question also asks for the moment of inertia, which can be found by summing the MMOI of the two bodies. The speaker suggests consulting a standard engineering book for this information.
  • #1
Rem Grwthy
3
0
I want to calculate the torque of the construction or the needed Power (Watt) to rotate it. The construction is a tube and on top of tube is stuck a rectangular parallelepiped:

Tube:

inner diameter=d=92mm, outter diameter=D=102mm, lenght=L=3000mm, mass=12.34kg

Rectangular parallelepiped:

x=3000mm, y=5000mm, z= 50mm, mass=250kg

http://www.ffevents.gr/nikos/sxediopaint.jpg

...Please assume missing data if needed.....
 
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  • #2
You need to show an attempt of solving this problem on your own. You question is also wrong in the sense that the power to rotate something depends on the angular velocity, which is not given in your problem statement.
 
  • #3
ok forget about this... But can you calculate the moment of inertia for this construction??
 
  • #4
You could do it as the summation of two composite bodies. Again, your question is posed wrong because the mass moment of inertia is about a specified axis. You can find the MMOI of the two bodies you have drawn in any standard engineering statics or dynamics book.
 

What is torque and power in relation to a rotating tube and rectangular parallelepiped?

Torque is a measure of the twisting force that can cause rotational motion, while power is the rate at which work is done or energy is transferred. In the context of a rotating tube or rectangular parallelepiped, torque and power are used to calculate the rotational motion of the object.

What is the formula for calculating torque for a rotating tube or rectangular parallelepiped?

The formula for torque is τ = r x F, where τ is the torque, r is the distance from the axis of rotation to the point where the force is applied, and F is the force applied. In the case of a rotating tube or rectangular parallelepiped, r would be the radius of the tube or the distance from the center of mass to the point where the force is applied.

How do you calculate power for a rotating tube or rectangular parallelepiped?

The formula for power is P = τω, where P is the power, τ is the torque, and ω is the angular velocity. In order to calculate power for a rotating tube or rectangular parallelepiped, you would first need to calculate the torque using the formula mentioned earlier, and then determine the angular velocity by dividing the number of rotations by the time taken.

What units are used to measure torque and power?

Torque is typically measured in units of newton-meters (N·m) or foot-pounds (ft·lb), while power is measured in watts (W) or horsepower (hp).

Are there any other factors to consider when calculating torque and power for a rotating tube or rectangular parallelepiped?

Yes, in addition to the distance from the axis of rotation and the applied force, the angle at which the force is applied also plays a role in determining the torque. For power, the efficiency of the system must also be taken into account.

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