9. G modeling#
9.1. Characteristics of modeling#
9.2. Characteristics of the mesh#
Number of knots: 1266
Number of meshes and types: 200 HEXA20
9.3. Tested sizes and results#
Identification |
Instants |
Reference |
Aster |
% difference |
|
Frequency (mode 4 out of plane) |
44.762 |
43.862 |
—2.009 |
||
Frequency (modes 5 & 6 off plan) |
110.52 |
105.953 |
—4.132 |
||
Frequency (mode 7 out of plane) |
169.08 |
159.749 |
—5.518 |
||
Frequency (Mode 8 in the map) |
193.93 |
193.93 |
193.590 |
—0.175 |
|
Frequency (mode 9 & 10 in the map) |
206.64 |
199.410 199.903 |
—3.498 —3.260 |
9.4. notes#
In*Code_Aster, the calculated modes are those of rigid bodies: the fourth reference mode is the first mode calculated by*Code_Aster*.
Appearance of two flexure modes between reference modes 8 and 9: these are modes 6 and 7 of*Code_Aster.
In the table below we have reported the first 14 natural frequencies found.
Mode No. |
Frequency (\(\mathrm{Hz}\)) |
1 |
43.86 |
2 |
105.95 |
3 |
105.95 |
4 |
159.75 |
5 |
193.59 |
6 |
199.41 |
7 |
199.90 |
8 |
206.16 |
9 |
206.16 |
10 |
219.27 |
11 |
245.07 |
12 |
245.07 |
13 |
249.13 |
14 |
287.75 |