GiD forum

hello

I meet problems with cylinders (hole or round) imported since files of iges format. The creation of volume is achieved. At the time of the meshing, there is the message of mistake: error in the meshing of the surface.

To explain the problem, i join a file cylinder.zip to show the problem at the time of the meshing. Files cyl_1.igs, cyl_3.igs, cyl_5.igs, cyl_6.igs work. Files cyl_2.igs and cyl_4.igs don't work at the time of the meshing.

Do you know this problem?

There are the same problem with holes in a part.

Best regards

Patrick Chevalier
France

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There are some problems in GiD at the time of orienting certain surfaces
correctly (closed, trimmed surfaces with holes, etc.)
In some of these cylinder samples, the function that calculates the normal
fail, and
if the direction is incorrect then the meshing process fails (it does not
known the correct direction of mesh advance).
Therefore, it is not a problem of the IGES reading process, but one of the
"correcting" filters

It is possible to repair a surface manually, by creating another trimmed
from this one, by means of
Geometry -- Create -- Nurbs Surface - Trimmed
The previous surface must be selected, and then select its lines to trim,
with this process possibly a correct surface is created above the old one.
At the end the bad surface must be deleted.
Note: It is fundamental not to pass the filter (Utilities -- Repair), since
the new surface would disorient.

In any case for the next beta version of GiD the problem will be already
solved.