New question #166741 on Yade:
https://answers.launchpad.net/yade/+question/166741
Hi,
I need to calculate the forces and torques acting on a mesh body when it is
contact with particles. I have already tried to use the ForceRecorder and
TorqueRecorder, but somehow it shows always a zero value.
To calculate the forces I used then:
utils.sumForces(ids,(1,0,0))
utils.sumForces(ids,(0,1,0))
utils.sumForces(ids,(0,0,1))
and tested the result by summing the O.forces.f(i) for all i in the mesh. Same
result!
I tried to the same for utils.sumTorques, but I cannot understand how this
function should work. In the yade doc I found:
"yade._utils.sumTorques((list)ids, (Vector3)axis, (Vector3)axisPt) → float¶
Sum forces and torques on bodies given in ids with respect to axis
specified by a point axisPt and its direction axis."
Does it gives the value of force+torque??
I also printed hier the values O.forces.t(i) for all i in the mesh and
considered the axisPt as (0,0,0) or as the centre of the mesh (this is a
cylinder). For both tentatives I could not find the same value given by
sumTorques.
Could someone explain me how the function utils.sumTorques works?
Thanks for the help!
Daniela
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