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Simulation - At least two bodies are interfering

Question asked by Flávia Gonçalves on Jul 3, 2018
Latest reply on Jun 22, 2020 by Ryan Dark

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Hi! I'm running a simulation on solidworks. It’s a simple simulation though the model is a complex geometry. I'm having problems obtaining the mesh, not because of the parameters but because it says that at least two bodies are interfering. I run the interference analyses with all option selected and there are only coincidente type of interference and it’s suposed to be cause the bodies are connected. I made the assembly from the beggining in new folders a thousand times to make sure that it wasn’t na ocasional error. Do you have any solution? I don’t know what to do.

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Ryan Dark Jul 3, 2018 11:55 AM
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Hi Flávia,
Can you attach this model to your post. That would let us go through the model and help locate what is causing the interference warning.
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- Flávia Gonçalves @ Ryan Dark on Jul 3, 2018 12:30 PM
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  I could't atach the file cause it's too big. See if you can open it with this dropbox link
  
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  - Ryan Dark @ Flávia Gonçalves on Jul 3, 2018 1:16 PM
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    Flávia,
    I also did not find any volumetric interferences. I think you are seeing an oddity of how the mesh is trying to represent the geometry. I remade the mesh with new, coarser mesh settings just to see if the mesh itself was creating the interferences itself and the model both meshed, began the solver, and gave me some results (done in 2017 SP5.0):
    
    You may want to try remaking the mesh to get around the warning on your end.
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    - Flávia Gonçalves @ Ryan Dark on Jul 5, 2018 6:58 AM
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      What parameters do you use? I'm trying with coarser meshing and it always detects interference
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      - Ryan Dark @ Flávia Gonçalves on Jul 5, 2018 11:41 AM
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        These were the mesh parameters I used for this test:
        Additionally, I set 'Incompatible Mesh' in the definition of the 'Global Contact Bonded'.
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Rogie Anastacio Dec 29, 2018 2:34 PM
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Hi,
I have similar problem as the original post.. my head is ready to explode (newbie in simulation, but been using SW for a while already) how to address the "two bodies interfering" error before my static simulation proceeds.

I have attached the zip file for you to look on..

My assy has no interference detected on assy.. and I also tried making the mesh coarser but to no avail..

Appreciate very much your help;.

Rgds,

Jiro
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- simulation- 2 bodies interference.zip7.8 MB
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- Ryan Dark @ Rogie Anastacio on Dec 29, 2018 6:48 PM
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  Hi Rogie,
  I ran 'Interference Detection' on your assembly using these settings:
  
  The results showed that there were two non-zero volumetric interferences on your model. You would need to remove these before continuing with Simulation.
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John Kong May 13, 2019 3:04 AM
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hi guys, i have a similar problem with my model as well. it shows alot of interference when i try to run the simulation. how can i fix it to run the simulation?
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- midsole(12519)2.SLDPRT.zip3.7 MB
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- Ryan Dark @ John Kong on May 13, 2019 5:11 PM
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  Hi John,
  Your model seems to very much suffer the same problem:
  There isn't a tool in Simulation built to handle interference like this. The ultimately solution to the problem lies on the model side where you would need to make modifications to the model to remove these interferences either by cutting away excess geometry or using 'Combine' features (GoEngineer - SOLIDWORKS: Combine Feature) to merge appropriate bodies together.
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Eefje Merckx Jun 20, 2020 4:52 AM
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Hello everyone,

I too am faced with a similar problem. The interference detection doesn't show any interferences, yet solidworks refuses to mesh my model. I tried playing with the mesh density, but it still didn't work.
Does anyone have a solution for this? My finals are depending on it... Thanks in advance!
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- Scooter.zip3.7 MB
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- Ryan Dark @ Eefje Merckx on Jun 22, 2020 4:13 PM
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  Eefji,
  I was able to copy your study into a new test study and mesh most the bodies with a course mesh. The remaining bodies that were not able to mesh initially were able to mesh after applying a default mesh control to those bodies. These were the results:
  
  When I ran the study though it came back as unstable. It appears you have a couple parts set to "hidden" that may need to have their contact definitions checked.
  Attachments
  - Assy volledige fiets.zip2.7 MB
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Simulation - At least two bodies are interfering

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