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[Workbench] Workbench 18.2 SpaceClaim->Mechanical geometry accuracy/tolerance problem

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Old   December 13, 2018, 18:41
Default Workbench 18.2 SpaceClaim->Mechanical geometry accuracy/tolerance problem
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Hello there!

Recently I've stumbled upon following problem in Ansys Workbench. Im using SpaceClaim as modeler and it seems like the tolerance of the geometry that is transfered into Mechanical is insufficient. I've proven that by comparing results from a case where the geometry is transferred from SC to Mechanical and when I export geometry from SC to .STP and import it in DesignModeler and use it in Mechanical. The difference in the results are significant, up to 10% as the system is highly sensitive on insignificant geometry changes. How do I know the problem is with transfering the geometry from SC to Mechanical and not with .STP file? Well, exported .STL file has size of about 300kb. When I import the geometry from SC in DM by using "Attach to Active CAD Geometry" and export .STP file from it, the file has the size of 11kb. Huge difference, isnt it? Again, when I import the 11kb .STP file to DM or SC and run the simulation in Mechanical, I obtain exactly the same result as I would just generate it in SC and then transfer it to Mechanical in normal way. This proves geometry transfered from SC to Mechanical has extremely low quality.

Summarizing... Is it possible to increase the accuracy/tolerance of the model that is transfered into Mechanical from SC? In Mechanical, when the geometry is transfered from SC, in the details of the geometrical entity, there is a tab "CAD Attributes", where we can find the setting called "PartTolerance" which default value is 1e-8 (0.00000001). However, the setting is grayed-out. I've spent already hours on trying to change this setting, however I found no solution . Any help is much appreciated
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