E.g. a shaft got an angular constant, angular velocity and I want to apply 3 forces on 3 dimensions of Cartesian. It's noticeable that after applying this forces the angular velocity fluctuations don't change.
I do not fully understand what your intention is, maybe you can specify in more detail.
But in general, you could use the VFORCE-statement. Then it depends, wether you want the force to be moving with your rotating body, in which case you attach the I-marker to it and the J-floating marker is on a reaction body (can also be the ground part) or you want the force to move with another body, in which case the J-floating marker is on your rotating body and the I-marker on this other body. A space fixed force is a special case of the latter: the I-marker is then on the ground part. You should also be careful about the sign of your forces, as positive forces are positive on the action part (where the I-Marker is attached).
There is also the option to specify an R-marker. Then the action force is still applied at the I-marker and the reaction force at the J-floating marker, but the force direction is specified with regard to thr R-system (which is the I-marker by default).
By the way: the floating marker has no pre-defined location but is moving with the I-marker (the coordinate systems are always aligned).
Does this answer your question?
first of all, tnx a lot for your answer, but as i mentioned in explanation, my main problem is that after applying the forces on 3 dimensions, the result which is the angular velocity of rotating body doesn't change at all, which i expect that it changes a bit at least... and i've tried ''space fixed'' and ''rotating with body'' as types of force and different amounts of force already.
I don't understand where my problem is?!
The rotational velocity will change only, if a torque around the rotation axis is effectively applied. So do your force line-of-action maybe cross the rotation axis (i.e. the i-marker is on the axis)? Or is there a kinematical contstraint (e.g. a motion) forcing your body to rotate with a predefined speed (these take precedence over forces)?
My actuator is a kinematic constraint as you said... It's a motion
it's acting on a disc and the problem is:the disk is connected to a cylinder which is supposed to rotate with the disk...but there's a 3d force and torque which is acting on this cylinder...
So now... With this notation that the disk and cylinder are concentric so how can i apply this forces and torques that angular velocity and acceleration of the disk takes effect as i consider?
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