Torque required to rotate a composite structure

[MikeUK]

Hi everyone I posted this in the classical physics forum but maybe it is more suitable for this forum.

I'm currently trying to select 2 hydraulic motors to rotate a relatively sizeable structure,

I'm hoping to rotate it through .5pi radians over a period of 30 mins (0.052 RPM), I'm hoping to rotate it at a relatively constant speed, obviously some acceleration will be required to get it up to speed.

The structure itself weighs 306 tons and has a moment of inertia of 13.136e6 Kg/m2

Any Help would be much appreciated

 

[LightHero]

There are a few things to consider when selecting the hydraulic motors for this application. The first is the torque that each motor will need to provide in order to rotate the structure. This can be calculated using the equation Torque = Moment of Inertia x Angular acceleration. In your case, the torque needed would be 687,680 Nm.The next thing to consider is the power that each motor will need to provide. This can be calculated using the equation Power = Torque x Angular velocity. In your case, the power needed would be 3,564,160 Watts.Finally, you will need to select motors that can provide the necessary torque and power at the desired speed. This can be calculated using the equation Motor speed = Power / Torque. In your case, the motor speed should be 5.2 RPM.Once you have selected the motors that can provide the necessary torque and power at the desired speed, you will need to make sure that they are compatible with the hydraulic system that you intend to use. This will involve making sure that the hydraulic system can provide the necessary pressure and flow to the motors.