ERROR 832: Segmentation rules have been violated (two triangles touch without a common edge).

Muhammad Haris
Muhammad Haris Altair Community Member
edited March 2021 in Community Q&A

Hi,

When I run my A380 plane model which was imported from the CADFEKO component library, I come across the following error:  ERROR 832: Segmentation rules have been violated (two triangles touch without a common edge).

What should I do in order to resolve this error successfully?. Actually, I want the Bi-Static RSC of a plane model A380 for my MS research work. Please help me to resolve this issue and also make its mesh surface accordingly. The model in Step format and related files are attached.

All the other files i.e. .cfx, .cfm, .fek etc are not attached due to its size which are greater than 15Mb. Your's reply should be more appreciable and acknowledged your efforts.

Thanks

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Answers

  • GGAMPALA
    GGAMPALA
    Altair Employee
    edited March 2021

    Hi Muhammad,

    You need the adjacent triangles to shared common edges, otherwise, there won’t be common mesh vertices between the mesh triangles and it not possible to enforce current continuity (Kirchoff’s current law) without common vertices. Follow the below steps to fix this kind of error:

    1. Locate the erroneous triangles in POSTFEKO using the "find elements" option (the OUT file will list the triangle id causing the error).
    2. Once you know the location in POSTFEKO, come back to CADFEKO and unlink the mesh from CAD (this is required to fix the mesh). For convenience, you can then exclude the CAD as you will no longer use it (Feko solver will act on the mesh).
    3. Zoom to the erroneous triangle location in CADFEKO (based on the view in POSTFEKO).
    4. Select a mesh vertex and move it or merge it to an adjacent vertex to ensure the triangles share common edges (select a vertex and right click to see the options).

    Once the mesh is fixed, re-run the solver (don't re-mesh the fixed mesh).

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