Sound_Spinning
there is something that i do understand here
with soft springs activated at
GROUP_MA = ('RP_fix', 'RP_load', ) ,CARA = 'K_TR_D_N', VALE = ( 1, 1, 1, 1, 1, 1, ),
i get the following modes values,
Total Strain Energy - Modal (TSE - ALL)
=======================================
NUME_ORDRE FREQ LIEU ENTITE TOTALE POUR_CENT
1 0.27564 Alum_els GROUP_MA 2.1784E-12 100
2 8.2059 Alum_els GROUP_MA 1.4476E-06 100
3 8.5998 Alum_els GROUP_MA 1.2957E-05 100
4 11.956 Alum_els GROUP_MA 6.7384E-06 100
5 19.206 Alum_els GROUP_MA 2.8204E-06 100
6 21.508 Alum_els GROUP_MA 3.1799E-06 100
7 5575.1 Alum_els GROUP_MA 69860 100
8 6466.3 Alum_els GROUP_MA 1.0067E+05 100
9 7447.8 Alum_els GROUP_MA 1.5619E+05 100
this is widely different from what you included
what is different in our analysis??????
i must say that in my professional life i never had to deal with a structure whose first (non rigid body) mode was of that order of magnitude, i.e. over 1000 Hz
If i remember well seismic codes say something like "over 30 Hz no further analysis is required"
the main concern was rather like to achieve this first mode over 2 to 5 Hz, if not over 1 Hz
