Hi! I want to calculate torque needed to rotate an object in rhino 7, is there any way to do it?
can you explain in detail so everyone can understand and suggest some ways. i mean what you are doing and how you want to use it.
I have simulated a kinetic facade that rotates based on a degree. Then, I want to calculate the force needed in Grasshopper to rotate the facade, so I can determine how much energy is required in real life to rotate it
share the screenshot of viewport and grashopper file, although i am beginner but anybody will be able to help you if you share some images.
Torque due to raising the center of gravity of the system?
Torque due to friction in the system?
Torque due to ???
@DanielPiker can you help me?
Read Kalpit 3d’s and David Cockey’s answer again.
Is this thing hinged at one end so it swings from that and needs to be lifted up? If so, how much does it weigh, where’s the center of gravity and where’s the hinge?
Is it hinged like a garage door so that the torque requirement is lower?
Is it hinged so that it swings horizontally and all you need to overcome is inertia?
It moves like this in a wall, it has a center, and its like 4 diamonds that stick one to another and attract each other @Nathan_Bossett
CEK_1601.gh (12.0 KB)
I have no idea:
- what it weighs
- where the CG is (the center of area?)
- Where the hinge or support is and how it works
- Where the handle is and in what direction it gets pulled, or what other mechanism turns it (chain/belt driven electric motor driven around a disk at the hinge?)
- What you mean by diamonds attracting each other in the context of how much torque or energy it takes to open or close this thing
- Whether all of this can be done in one step, or whether it’s a simulation (with a changing force and angle of pull from someone standing there lifting a handle through a range of motion)
I think what you’ll need to do is:
- output some physical properties from your model- weight, cg, lever axis, etc.
- add some physical properties describing what/who pulls it in what way and from what point
From there, the math to figure out torque or energy isn’t hard but you seem to be omitting most of the information required to solve the problem.
Rhino can help you find centres of mass which will be relevant to your calculations, but unless there is a helpful plugin for this (and there are a lot of plugins to wade through) I think you are going to have to do the calculations the old fashioned way.
Which brings me to what might prove a more significant consideration. Given your question, I’m assuming you are not an engineer. If this is planned to be implemented as a real-world facade, then you need proper engineering input from a chartered engineer. There is a lot to consider beyond how much energy is needed to rotate it…