5. C modeling#
5.1. Characteristics of modeling#
\(\mathrm{1D}\) axisymmetric shells
No boundary conditions.
The Love-Kirchhoff model is chosen to describe the kinematics. With the selected element, this kinematics is obtained by penalization: we put a large value for the coefficient A_ CIS. In addition, metric correction is neglected.
5.2. Characteristics of the mesh#
Number of knots: 81
Number of meshes and types: 40 SEG3
5.3. Tested sizes and results#
(Frequencies in hertz)
Fashion ID |
Reference |
Aster |
|||
OPTION =” BANDE “ |
|||||
(simultaneous iteration method) » |
Aster OPTION =” AJUSTE “ (inverse power method) |
% difference |
|||
2 |
237.25 |
237.31 |
237.31 |
237.32 |
0.025/0.029 |
3 |
282.85 |
282.77 |
282.77 |
282.78 |
—0.028/—0.025 |
4 |
305.24 |
304.95 |
304.95 |
—0.096 |
|
5 |
324.17 |
323.68 |
323.68 |
—0.150 |
|
6 |
346.76 |
346.23 |
346.23 |
—0.154 |
5.4. notes#
The purpose of this test with this modeling is only to test the mass matrix. Since a satisfactory difference was observed on the first six frequencies, it was decided not to calculate the following frequencies.