import problems iges in ansys

[franciDK]

it's the first time i've been citing myself with a more complicated problem in ansys.
until now i had experience only with simple geometries created directly in ansys itself and with trivial analysis of tension states.
this time i need to work with more complicated geometries than i created the 3d model myself with solidworks.
in particular i have the files of each component (mostly flanges and cylindrical/conical bodies) and the files together, always created on solidworks with couplings of type "co incidence".
once you turn these files into .iges files i have problems with importing on ansys.
problems are of different type:
1- importing single pieces i have no problem with cylindrical/conical pieces files, although ansys does not recognize them as solid, but i have problems with "tessellation" on different areas of flanges while having eliminated holes.
2- importing the iges file of the axieme (both with that without intermediate flanges) ansys does not respect the mating constraints and place the pieces quite randomly.
whoever can give me a few tips is welcome.
thank you in advance for any advice!

ps- i can't use other formats like parasolid for licensing issues.

 

[franciDK]

I also tried to insert a reference system into the solidworks file together and then save it in the iges file but the situation of random positioning does not change.

 

[Onda]

try to export a .step file from sw and import it into ansys, it usually works better for assemblies.
It seems very strange to me that there is this random positioning, unless you care no more files.
normally each part has its own reference system and is then positioned at the level of together.
if you carry together in step format (but also in iges normally) the parts are saved in the reference system of together and when opening with a different program you find them in the correct place.

If you save the aid as separate parts, when imported into the new program you find yourself in the part reference system and things do not marry.
in any case try with the step format that usually works best for axiemi.

 

[franciDK]

in the iges file save options in sw I chose the option "Save all the components together in one file" and if I try to reopen the iges file in sw everything seems to be fine. the problem is in the import on ansys.
I attach the result.

 

[Onda]

It seems to me that your problem is due not to a reference system but to the fact that ansys sees un trimmed surfaces.
trimmed surfaces are normally biparametric surfaces to which a contour has been cut out. if ansys reads badly the edge of the cut shows you the whole and un trimmed surface.
this happens very often, especially with old versions of ansys.
try to change import tolerance (I don't remember how to set up) and import a component at a time to see which from problems
Hi.

 

[franciDK]

Thank you for your concern.
I have already tried to import the components separately.
I have no problem with cylindrical bodies though ansys still doesn't seem to recognize them as solid bodies because I have problems in meshing.

When I amount the flanges instead I receive only the following warnings for different areas:
"error in surface tessellation in area %%. this area can only be displayed with /facet,wire and cannot be a part of v,va,vsum,or asum operation".

I read something about it and it seems that this type of warning can be ignored because it may not create any problem at mashing level.
However, it remains the big problem of the relative positioning in the total file (obviously with a lot of similar warnings).