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  1. rharbi

    Getting Zero's Natural Frequency for the first 4 modes ; any idea why this happen

    Thanks Tmoose Indeed it was like free free model. DO you know how could I estimate piping elastic support stiffness correctly; Second question shall I consider adding point mass in modal analysis; I'll not perform any static or harmonic analysis jsut modal analysis
  2. rharbi

    Getting Zero's Natural Frequency for the first 4 modes ; any idea why this happen

    Hello all, I'm working on piping modal analysis through ANSYS but the surprise is that I got 4 zeros natural frequencies and very low 5th and 6th values. Although I put all supports boundary conditions. I would highly appreciate your guidance and comments Regards,
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