salvatore87
Guest
Hello everyone I would like to know if to apply the force to a keypoint or a knot is the same.
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radian
Guest
I try to answer you though I don't have a great familiarity with building geometries directly from ansys.
I imagine that applying force to a kp or knot is the same thing since the knot is coincident with the kp.
in this example they do it:http://www.mece.ualberta.ca/tutorials/ansys/bt/truss/truss.html
I imagine that applying force to a kp or knot is the same thing since the knot is coincident with the kp.
in this example they do it:http://www.mece.ualberta.ca/tutorials/ansys/bt/truss/truss.html
salvatore87
Guest
the problem is that the keypoint ke I have tacciato i, is located in correspondence of the body mass center, but from what I have to see you can not load. At this point I decided to load the node immediately closer to the keypoint, but I can not select it manually.I also tried to generate a node at the center of mass, but it does not charge the same.
radian
Guest
i imagine using kp as a force application point you can only do if you use kp for the definition of geometry, in that case in fact, there will be a knot that by force of things will be coincident with the kp, but not if you put kp around for geometry and then apply a load, because it has no connection with the model. (some say if i said a mouthful)....but it doesn't charge the same.
what do you mean, "don't charge the knot"?
salvatore87
Guest
yes that ke you said is correct,fork is the keipont not being part of the structure does not convey the efforts to the remaining knots,cmq I managed to solve the problem by manually selecting the node nearest to the mass center.thanks
gerod
Guest
I kindly ask to write in Italian. We discussed it again!! !
It is written "that" not "ke".
Thank you.
Hi.
It is written "that" not "ke".
Thank you.
Hi.
Arturo79
Guest
I read the discussion.
then, it is not correct to apply a force to a keypoint. It is usually done because the kp usually coincides with the knot.
when the kp does not coincide with a knot, problems like errors and warnings begin to occur.
the kp must only serve as a point of construction, in the sense of geometric point.
p.s. It's weird that by making a knot happen in the mass center, you don't have to manually select it.
if you try to use the nsel command? If you know the coordinates of the mass center, you also know those of the knot.
I don't think there's any problem here.
use nsel and the coordinates of the node to which you want to apply force. In this way other knots become invisible.
to finished operation do not forget to reactivate all the knots
then, it is not correct to apply a force to a keypoint. It is usually done because the kp usually coincides with the knot.
when the kp does not coincide with a knot, problems like errors and warnings begin to occur.
the kp must only serve as a point of construction, in the sense of geometric point.
p.s. It's weird that by making a knot happen in the mass center, you don't have to manually select it.
if you try to use the nsel command? If you know the coordinates of the mass center, you also know those of the knot.
I don't think there's any problem here.
use nsel and the coordinates of the node to which you want to apply force. In this way other knots become invisible.
to finished operation do not forget to reactivate all the knots