GiD forum

Hi everyone,
I'm working with GiD 7.5.8b and I noticed that if you have a
hollow surface made of the subtraction of two quadrilaterals
(mine have parallel sides) and you assign the element to be a
quadrilateral, if you go for a structured mesh of the surface,
as soon as you try to assign number of elements on the sides
GiD crashes.

With other shapes it seems not to happen. May be is
something in the search of opposite sides in the structured
mesh algorithm?

Kind Regards

Andrea

Hello Andrea.

We tried to repeat this bug several times, but it worked ok
(not crashed, only showed a message like: "Problems in surface 1. Marked as
structured and it cannot be".)

Can you send a model with this problem (or more detailed instructions to
repeat it)?

Thanks

Enrique
----- Original Message -----
From: "Andrea Calaon" andrea at beasy.com
To: gidlist at gatxan.cimne.upc.es
Sent: Friday, May 27, 2005 11:46 AM
Subject: [GiDlist] Meshing crash


Hi everyone,
I'm working with GiD 7.5.8b and I noticed that if you have a
hollow surface made of the subtraction of two quadrilaterals
(mine have parallel sides) and you assign the element to be a
quadrilateral, if you go for a structured mesh of the surface,
as soon as you try to assign number of elements on the sides
GiD crashes.

With other shapes it seems not to happen. May be is
something in the search of opposite sides in the structured
mesh algorithm?

Kind Regards

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

Hello!
I am trying to view the results of another program at the postprocessing
section of GiD.
There are 2 meshes: one with triangular elements that is a membrane and one
with linear
elements that are the cables around the membrane.
The original file generated with both meshes and results is "results". And
I don´t understand why when I choose to view "cable load" results there are
some triangular elements appearing at the corner, as you can see on the
image attached.
Just to test, I manually erased all the results ("modresults") and
conectivities that had to do with the membrane and left only the information
about the cable and then it works, on "cable load" you see only linear
elements!
But I need both in the same file, so can anyone tell me what is wrong with
the file or if is there any parameter that I can change to make the original
file "results" work???
Thank you very much!!!
Cristina.
Cristina Almeida Bueno e Silva
crisabs at gmail.com
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Hi,

that's because the nodes are shared among the line elements and the triangles.
As the three nodes of the triangles at the corners are the same as the ones of
the line element and as the result 'cable load' is defined for those nodes, the
triangles are drawn.

One solution, the easiest, would be to renumber then nodes of the line
elements. Another one would be to remesh the triangles so that there will be
two triangles per corner, but this is quite more complicated.

miguel



_____

De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Cristina Almeida Bueno
e Silva
Enviado el: martes, 31 de mayo de 2005 5:46
Para: gidlist at gatxan.cimne.upc.edu; gidlist at gatxan.cimne.upc.es
Asunto: [GiDlist] Something wrong with postprocessing


Hello!

I am trying to view the results of another program at the postprocessing
section of GiD.

There are 2 meshes: one with triangular elements that is a membrane and one
with linear
elements that are the cables around the membrane.

The original file generated with both meshes and results is "results". And I
don´t understand why when I choose to view "cable load" results there are some
triangular elements appearing at the corner, as you can see on the image
attached.

Just to test, I manually erased all the results ("modresults") and
conectivities that had to do with the membrane and left only the information
about the cable and then it works, on "cable load" you see only linear
elements!

But I need both in the same file, so can anyone tell me what is wrong with the
file or if is there any parameter that I can change to make the original file
"results" work???

Thank you very much!!!
Cristina.


Cristina Almeida Bueno e Silva
crisabs at gmail.com


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Another way is to shut off the triangle mesh, just by open the window
Windows-view style, select the 'S deformed' line on the listbox and clicking
the '( )' icon to switch it off. Perhaps is this what you wanted?

miguel


_____

De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Cristina Almeida Bueno
e Silva
Enviado el: martes, 31 de mayo de 2005 5:46
Para: gidlist at gatxan.cimne.upc.edu; gidlist at gatxan.cimne.upc.es
Asunto: [GiDlist] Something wrong with postprocessing


Hello!

I am trying to view the results of another program at the postprocessing
section of GiD.

There are 2 meshes: one with triangular elements that is a membrane and one
with linear
elements that are the cables around the membrane.

The original file generated with both meshes and results is "results". And I
don´t understand why when I choose to view "cable load" results there are some
triangular elements appearing at the corner, as you can see on the image
attached.

Just to test, I manually erased all the results ("modresults") and
conectivities that had to do with the membrane and left only the information
about the cable and then it works, on "cable load" you see only linear
elements!

But I need both in the same file, so can anyone tell me what is wrong with the
file or if is there any parameter that I can change to make the original file
"results" work???

Thank you very much!!!
Cristina.


Cristina Almeida Bueno e Silva
crisabs at gmail.com


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Hello GiD team!
I tried it now as well and the criteria for the crash (which
actually happens sometimes) are not clear to me.
It happens with triangles as well, and normally after you
have been playing for a while with the meshing, therefore is
quite difficult to imagine what could be causing it.

I send you the model I was playing with and a picture of the
crash ...

Best Regards
Andrea

On 30 May 2005 at 18:10, Enrique Escolano wrote:

Hello Andrea.

We tried to repeat this bug several times, but it worked ok
(not crashed, only showed a message like: "Problems in surface 1. Marked as
structured and it cannot be".)

Can you send a model with this problem (or more detailed instructions to
repeat it)?

Thanks

Enrique
----- Original Message -----
From: "Andrea Calaon" andrea at beasy.com
To: gidlist at gatxan.cimne.upc.es
Sent: Friday, May 27, 2005 11:46 AM
Subject: [GiDlist] Meshing crash



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