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Form Union and Form Assembly Problem with Imported Geometry

Posted 2018年3月10日 GMT-5 11:28 Geometry, Modeling Tools & Definitions, Results & Visualization Version 5.3 2 Replies

beraicli
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Hi,

I am having trouble in forming union and assembly when I import my geometry outside made in Solidworks or Catia.

The problem is that when I use "Form Union": - Error in parameter domain topological analysis.

or for "Form Assembly": - Pairs generated with simplifed method. The standard method failed for the provided repair tolerance.

May these occur because of problematic geometry imported from other software, or do these error indicate a lack in my COMSOL knowledge?

Thanks in advance,

Bera

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Bera
2 Replies Last Post 2018年3月14日 GMT-4 16:22
Jim Freels mechanical side of nuclear engineering, multiphysics analysis, COMSOL specialist
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Posted: 7 years ago 2018年3月14日 GMT-4 13:54

Depends on a lot of factors; predominantly how complex the geometry is. Have you tried a simpler geometry first to make sure that the import process is working correctly for you ? Do you have the actual model file that we can look at that gives you the problem ? Have you tried tweaking the tolerance levels on the options when you import ?

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James D. Freels, Ph.D., P.E.
Depends on a lot of factors; predominantly how complex the geometry is. Have you tried a simpler geometry first to make sure that the import process is working correctly for you ? Do you have the actual model file that we can look at that gives you the problem ? Have you tried tweaking the tolerance levels on the options when you import ?
beraicli
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Posted: 7 years ago 2018年3月14日 GMT-4 16:22

Hi Jim,

Thanks for reply. The model, in general, does not belong to me so I cannot share it. For better follow-up for other users, however, I want to emphasize two points.

The geometry I have is a basic one, so I do not think the problem is complexity for my case. I assume the export problems may result in problematic surface on my geometry, which is a problem of CAD software. Recently, I created similar geometry in COMSOL and I succeeded to form an assembly out of it.

Second point is that when I adjust the tolerance levels, warnings keep coming for CAD exported geometry. I will make sure the CAD model is right and will post here the results for others who may need so.

Thank you again,

Bera

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Bera
Hi Jim, Thanks for reply. The model, in general, does not belong to me so I cannot share it. For better follow-up for other users, however, I want to emphasize two points. The geometry I have is a basic one, so I do not think the problem is complexity for my case. I assume the export problems may result in problematic surface on my geometry, which is a problem of CAD software. Recently, I created similar geometry in COMSOL and I succeeded to form an assembly out of it. Second point is that when I adjust the tolerance levels, warnings keep coming for CAD exported geometry. I will make sure the CAD model is right and will post here the results for others who may need so. Thank you again, Bera

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