Modal Analysis Units
- Christian
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10 years 7 months ago #7669
by Christian
Modal Analysis Units was created by Christian
Hi all,
I'm carrying out a modal analysis of a structure with the help of the MACRO MODE_ITER_SIMULT. In Code_Aster I'm using the units m, Pa and N. When I now look a the mode shape with paraView it shows me displacements over hence. The question now is, if the displacement one gets out when looking at the mode shapes is an absolute value, hence unit [m], or if the displacmenet is somehow normalised. Does anyone of yous know the answer?
Thanks very much for your help!
Cheerio
I'm carrying out a modal analysis of a structure with the help of the MACRO MODE_ITER_SIMULT. In Code_Aster I'm using the units m, Pa and N. When I now look a the mode shape with paraView it shows me displacements over hence. The question now is, if the displacement one gets out when looking at the mode shapes is an absolute value, hence unit [m], or if the displacmenet is somehow normalised. Does anyone of yous know the answer?

Thanks very much for your help!
Cheerio
- RichardS
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10 years 7 months ago - 10 years 7 months ago #7670
by RichardS
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Replied by RichardS on topic Re: Modal Analysis Units
Hello,
this is an excerpt from the documentation file of MIDE_ITER_SIMULT [U4.52.03]:roughly translated this means:
Best regards,
Richard
this is an excerpt from the documentation file of MIDE_ITER_SIMULT [U4.52.03]:
En sortie de cet opérateur, les modes propres réels ou complexes sont normalisés à la plus grande
des composantes qui n'est pas un multiplicateur de LAGRANGE. Pour choisir une autre norme, il faut
utiliser la commandeNORM_MODE [U4.52.11]
In the output of this operator the real or complex eigenmodes are normalized with the biggest
component, which is not a LAGRANGE multiplier. In order to chose an other norm one must use
the command NORM_MODE [U4.52.11]
Best regards,
Richard
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Last edit: 10 years 7 months ago by RichardS.
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