MoM matrix

ju1995
ju1995 Altair Community Member
edited October 2021 in Community Q&A

Hello,

I have a problem regarding calculations based on the MoM matrix, which I extracted from the mat.file using mat2ascii.exe. After importing the MoM matrix (size:88x88) to Matlab, I manually calculated the Characteristic Modes (size: 88x1) by solving the corresponding eigenvalue problem.

Unfortunately, the original mesh data from FEKO (Nastran file) do not contain the 88 triangle edges, only the centre coordinates and grid points of the 66 triangles are given.

How can I plot the Characteristic Modes based on the available mesh data?

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Answers

  • Mel
    Mel Altair Community Member
    edited October 2021

    It would be better to output the geometry to the *.out file.

    See the last post in the thread here.

     

  • ju1995
    ju1995 Altair Community Member
    edited October 2021

    Thank you very much, I was not aware of this ability to export further mesh information and followed the given advice!

    Could you please tell me, what KORP, KORM, POIP and POIM stand for and why there appear negative values for the edges?

    imageimage

  • Mel
    Mel Altair Community Member
    edited October 2021

    Details in section 8.1.1. in the Altair_Feko_User_Guide.pdf

    image

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