Autodesk Robot Structural Analysis

[#1]

Bonjour a tous,

J'ai lancé analyse modale d'une Bâtiment de l'hôpital, j'ai essayé avec 250 modes. A la fin de démarche, Il a un avertissement, quelqu'un pourrait me dire, c'est quoi la faute et la solution, SVP.
Merci par avance.

[#2]

I'm sorry but the picture is too small to read the warning. Assuming it is for a single missing eigenvalue than for seismic / spectral analysis just ignore it. The mass contribution for this mode comparing to 250 others that should produce over  90% of participating masses is insignificant.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[#3]

Hi you,

Thanks so much for your answer. I will try do as you talk.

I send you the big picture to review, file att.

[#4 · Accepted solution]

This is exactly the situation I described. If you running seismic analysis just ignore the warning and check if you have over 90% of participating masses in the horizontal directions.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[#5]

Thanks Artur,

Nice day for you!