Simple question on cylindrical support [solved]
14 years 11 months ago #4461
by Claus
Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
Replied by Claus on topic Re:Simple question on cylindrical support
theCapitain wrote:
It works for this particular case that I've made an image of. I am wondering if it works as well when a bit o' torsion is introduced. Let me know - I can't be bothered to try that right now
Be aware that you should have a fairly smooth cylindrical surface (very unlike the coarse mesh I just tested with), otherwise you'll have warnings about too big of an angle between the surfaces etc.
[img]<br /><br />Post edited by: Claus, at: 2010/07/22 11:48
Hi Calus,
you are right, that's the case, I have to impose the displacement and imposing dx=0 and dy=0 results in preventing shaft's rotation.
Linking the cylindrical surface to a single node is an excellent solution that, among other things, doesn't stiffen the shaft on the bending plane (so you are that Claus huh? Congratulations men!).
Anyway, while I was trying to solve the problem reading the documentation (with extreme difficulties: my French is very basic) I've found a way similar to which I was thinking when I started this topic:
char=AFFE_CHAR_MECA(MODELE=mode,
FACE_IMPO=_F(GROUP_MA=bearing,
DNOR=0.0,),),);
so the tangential DOF of the surface's nodes (DTAN) should be free. Am I right?
It works for this particular case that I've made an image of. I am wondering if it works as well when a bit o' torsion is introduced. Let me know - I can't be bothered to try that right now
Be aware that you should have a fairly smooth cylindrical surface (very unlike the coarse mesh I just tested with), otherwise you'll have warnings about too big of an angle between the surfaces etc.
[img]<br /><br />Post edited by: Claus, at: 2010/07/22 11:48
Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
14 years 11 months ago #4462
by Claus
Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
Replied by Claus on topic Re:Simple question on cylindrical support
Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
14 years 11 months ago #4464
by theCapitain
Replied by theCapitain on topic Re:Simple question on cylindrical support
here the result
14 years 11 months ago #4468
by Claus
Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
Replied by Claus on topic Re:Simple question on cylindrical support
Very cool - I actually hadn't tried the DNOR boundary condition before since I hadn't had a use for it, but I'll definitely remember to use it from now on.
Post all the questions you want, there are a few other very capable users on this small forum, that'll be happy to help out as well.
If you get bored, you should do some ANSYS/Aster comparisons, many people are familiar with ANSYS but not Aster, and you have some experience with ANSYS right?
Delegating jobs is always fun
Regards,
Claus
Post all the questions you want, there are a few other very capable users on this small forum, that'll be happy to help out as well.
If you get bored, you should do some ANSYS/Aster comparisons, many people are familiar with ANSYS but not Aster, and you have some experience with ANSYS right?
Delegating jobs is always fun
Regards,
Claus
Code_Aster release : STA11.4 on OpenSUSE 12.3 64 bits - EDF/Intel version
Moderators: catux
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