XANSYS Message: 38494 [Go back to message list] [bookmark on del.icio.us]
No rating yet Subject: Re: Connecting areas with areas and volumes Author: Yaser Jaradat Date: 2002-06-04 18:05:00The discontinuity disappeared after I used WMID,Yes
Thanks guys
Yaser
Yaser Jaradat wrote:
> Tom,
> I think you are right because thats the msg viewed by the note...
> Model is discontinuous > WSORT reordering may be better. > WMID,YES may also help if line elements are connected to mid-nodes. > MODEL DISCONTINUOUS ELEMENT 6 USED FOR NEW START AS ELEMENT 1
> But what I dont' know if that thing affects the solution or not ?
> Yaser
> twall@w... wrote:
> > Yaser,
> > Ansys automatically reorders the elements when you solve. The default is to > > ignore midside nodes during the reorder. If you have spring elements > > connected only to midside nodes then you get the "model discontinuous" note, > > because its not checking the midside nodes. Use the command WMID,YES to > > force Ansys to use midside nodes during the reorder and you shouldn't get > > the discontinuous messages anymore.
> > Tom Wall > > Williams International > > Walled Lake, MI
> > -----Original Message----- > > From: Yaser Jaradat [SMTP:yjaradat@g...] > > Sent: Tuesday, June 04, 2002 4:52 PM > > To: xansys@yahoogroups.com > > Subject: Re: [xansys] Connecting areas with areas and volumes
> > Mark,
> > My model is shell elements on a form of I or II section....and some > > sides are connected to springs (combin39 > > elements). When I solve the shells without the springs I don't get > > the discontinuous msgs. but when I connect > > the springs, the Note appears. I think it doesn't affect the > > solution because it is neither error not warning. > > It is just a note.
> > yaser
> > "Tate, Mark HS-SD" wrote:
> > > Yaser, > > > If you have tied parts of your model together with coupled nodes > > or > > > constraint equations, you may get this warning, but your model is > > OK. Also, > > > check you displacement contour plots for any obvious > > discontinuities across > > > your model. There should not be any step changes in color > > contours. If you > > > have detrimental discontinuities, this should become apparent. > > Animating > > > your displacements may also reveal unusual disconnects.
> > > Mark Tate > > > Principal Engineer > > > Hamilton Sundstrand - San Diego, CA > > > A United Technologies Company > > > E-mail: mark.tate@h...
> > > -----Original Message----- > > > From: Yaser Jaradat [mailto:yjaradat@g...] > > > Sent: Tuesday, June 04, 2002 11:32 AM > > > To: xansys@yahoogroups.com > > > Subject: Re: [xansys] Connecting areas with areas and volumes
> > > Yes I am using linear quadratic elements. First I generated > > keypoints then > > > created divided lines then I created the areas and meshed them > > according to > > > the line divisions, (mapped).
> > > I didnt' get any error msgs. just the NOTE about model > > discontinuous...The > > > model is runing ok and I got results but I am worrying about the > > note may > > > affect the results ?
> > > Yaser
> > > Roberto Porto wrote:
> > > > Yaser,
> > > > Are you using linear and quadratic elements? > > > > If you are not, the problem is not in the common line; if you > > are, define > > > the linear elements first.
> > > > Regards,
> > > > Roberto Porto > > > > DSC Engenharia > > > > ----- Original Message ----- > > > > From: Yaser Jaradat > > > > To: xansys@yahoogroups.com > > > > Sent: Tuesday, June 04, 2002 1:12 PM > > > > Subject: Re: [xansys] Connecting areas with areas and volumes
> > > > Roberto,
> > > > I already checked that. The keypoints and the lines are common > > between > > > the areas at intersection. Also I checked the element. All > > elements share > > > the same nodes at connection points,but > > > > still getting the same message.
> > > > *** NOTE *** CP= 84.642 > > TIME= 12:02:41 > > > > Model is discontinuous > > > > WSORT reordering may be better. > > > > WMID,YES may also help if line elements are connected to > > mid-nodes. > > > > MODEL DISCONTINUOUS ELEMENT 6 USED FOR NEW START AS > > ELEMENT > > > 1 > > > > MODEL DISCONTINUOUS ELEMENT 9 USED FOR NEW START AS > > ELEMENT > > > 2 > > > > MODEL DISCONTINUOUS ELEMENT 10 USED FOR NEW START AS > > ELEMENT > > > 3 > > > > MODEL DISCONTINUOUS ELEMENT 13 USED FOR NEW START AS > > ELEMENT > > > 4 > > > > MODEL DISCONTINUOUS ELEMENT 14 USED FOR NEW START AS > > ELEMENT > > > 5 > > > > MODEL DISCONTINUOUS ELEMENT 25 USED FOR NEW START AS > > ELEMENT > > > 6 > > > > MODEL DISCONTINUOUS ELEMENT 26 USED FOR NEW START AS > > ELEMENT > > > 7 > > > > MODEL DISCONTINUOUS ELEMENT 29 USED FOR NEW START AS > > ELEMENT > > > 8 > > > > MODEL DISCONTINUOUS ELEMENT 36 USED FOR NEW START AS > > ELEMENT > > > 9 > > > > MODEL DISCONTINUOUS ELEMENT 51 USED FOR NEW START AS > > ELEMENT > > > 10 > > > > MODEL DISCONTINUOUS ELEMENT 52 USED FOR NEW START AS > > ELEMENT > > > 11
> > > > And so on...
> > > > Roberto Porto wrote:
> > > > > Check if the lines are really the same; sometimes, there is > > a line > > > shorter than the other one. Plot the line numbers and vheck if > > they are the > > > same, if yes the areas are connected.
> > > > > Regards,
> > > > > Roberto Porto > > > > > DSC Engenharia
> > > > > ----- Original Message ----- > > > > > From: Yaser Jaradat > > > > > To: xansys@yahoogroups.com > > > > > Sent: Tuesday, June 04, 2002 12:10 PM > > > > > Subject: Re: [xansys] Connecting areas with areas and > > volumes
> > > > > Riccardo,
> > > > > I think you when you define areas to share the same > > keypoints, then > > > they already will be sharing the lines > > > > > ..right ? > > > > > because I glued them and the results didn't change.
> > > > > Am I raight or wrong ?
> > > > > Yaser
> > > > > Riccardo Testi wrote:
> > > > > > Yaser, > > > > > > your area must share lines, not only keypoints. Have you > > checked > > > that?
> > > > > > >I am trying to create a model from multiple areas then > > connect > > > them > > > > > > >together to work as one unit. The areas are > > > > > > >perpendicular to each other to for a box or I -shape > > section. I > > > created > > > > > > >keypoints and connected the areas > > > > > > >through the common keypoints. I meshed the whole thing > > then > > > applied > > > > > > >boudary conditions and loading. I got a > > > > > > >message says that my model is discontinuous and since I > > am using > > > SHELL99 > > > > > > >with layered material, I found that > > > > > > >some of the layers were dropped when I viewed the > > results file.