FAQ 000242 FR

Add-on modules RF-DYNAM Pro - Natural Vibrations RF-DYNAM Pro - Equivalent Loads RF-DYNAM Pro - Forced Vibrations

How many mode shapes do I need to consider in the dynamic analysis?

Réponse

In principle, you need to consider so many mode shapes that the sum of the effective modal masses (that is, for a normalization of Mi = 1, the sum of the quadrats of the involved factors) is at least 90 % of the effective total mass.

For this, it is also useful to also calculate the equivalent masses in Window 1.1 General Data.

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Premiers Pas

Premiers pas

Ici vous trouverez quelques trucs et astuces pour faciliter votre prise en main des logiciels de calcul de structure RFEM et RSTAB.