[GiDlist] displacement_vector

[Thanasis Makrodimopoulos]

Hi,

If I want to present the vector of the nodal displacements but the mesh is too dense (thus the picture is not clear)
I would like to present the vector only of some nodes i.e. in a neighbourhood of
10 nodes to show one vector. Is this possible?

Regards

Thanasis
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://listas.cimne.upc.edu/pipermail/gidlist/attachments/20050809/18963790/attachment.htm

[Rick.Morgans at csiro.au]

Hi Bahong,

This may or may not help. A colleague wanted to reconstruct point cloud
data of part of a human foot (a heel pad if I remember correctly). He
used a package called Rhino (http://www.rhino3d.com/) to "drape"
surfaces over the point cloud. He then got the surfaces into the ansys
mesher, I'm assuming via IGES. There is a demo version of Rhino
available, so maybe you could give that a try to create your smooth
NURBS surfaces before import into GiD.

Cheers

Rick Morgans
Postdoctoral Fellow
CSIRO


-----Original Message-----
From: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] On Behalf Of ya ya
Sent: Tuesday, 9 August 2005 7:23 AM
To: gidlist at gatxan.cimne.upc.es
Cc: wan at ucalgary.ca
Subject: [GiDlist] Creating a 3D Geometry from triangulated arbitrary

Dear Enrique,

Thank-you very much for your quick reply!

1) Once the triangulated surface has been read into GID, is there a way
=
to manipulate it so as to come up with a smooth surface using nurbs?
Dxf is a very bad graphics exchange format, it don't support NURBS =
surfaces, then smoot surfaces are translated as a collection of =
triangles, and it's not possible to recover the original smooth shape.
=
For a simple geometry, like yout two cylinders, it's better to =
reconstruct them in GiD (by revolution, etc), using the imported =
geometry only to get some dimensions.

Check if your external CAD can export in other better formats, like =
IGES, Parasolid, ACIS or VDA

Unfortunately, the cylinder was a simple fictituous example that I chose
in
order to demonstrate to you my problem. Actually, I am dealing with a 3D

arbitrary shaped solid (prostate organ) that I have reconstructed from a

series of ultrasound images defining the outline of the prostate
(cross-sections)in an axial direction. The end result is a triangulated
surface. Right now, when I read it into GID, it takes every single
triangle
as a surface and we end up using a large number of triangles (about
10,000),
hence problems with volume subtraction operations and slowness in
processing
time. I understand that for Boolean volume substractions, it is better
to
have few surfaces, and SMOOTH ones for the algorithm to work well and
'fast'.

You mentioned about getting the data into IGES, Parasolid, ACIS or VDA
format, but the software that I use to construct the triangulated
surface
does not support these formats as export format. So, how do I convert my

triangulated surface into a smooth (nurbed) surface that can be read
into
GID as one single surface?

Thank-you!!

Bahong

_________________________________________________________________
Take advantage of powerful junk e-mail filters built on patented
Microsoft(r)
SmartScreen Technology.
http://join.msn.com/?pgmarket=en-ca&page=byoa/prem&xAPID=1994&DI=1034&SU
=http://hotmail.com/enca&HL=Market_MSNIS_Taglines
Start enjoying all the benefits of MSN(r) Premium right now and get
the
first two months FREE*.

_______________________________________________
GiDlist mailing list
GiDlist at gid.cimne.upc.es
http://gid.cimne.upc.es/mailman/listinfo/gidlist

[miguel]

Hello,

By now this is not possible, sorry. But we're thinking about adding it to
GiD soon. I'm thinking of something like the amount (%) of vectors to be
drawn when the element is too small (for instance less than 10 pixels or
so.).



miguel



_____

De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Thanasis
Makrodimopoulos
Enviado el: martes, 09 de agosto de 2005 16:43
Para: gidlist at gatxan.cimne.upc.es
Asunto: [GiDlist] displacement_vector





Hi,



If I want to present the vector of the nodal displacements but the mesh is
too dense (thus the picture is not clear)

I would like to present the vector only of some nodes i.e. in a
neighbourhood of

10 nodes to show one vector. Is this possible?



Regards



Thanasis

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://listas.cimne.upc.edu/pipermail/gidlist/attachments/20050810/27bfb12e/attachment.htm