3. Modeling A

3.1. Characteristics of modeling

Characteristics of the elements:

DISCRET	with nodal masses	M_T_D_N
	and stiffness matrices	K_T_D_L
	and damping matrices	A_T_D_L

Boundary conditions:

in all nodes	DDL_IMPO	(TOUT =” OUI “DY = 0., DZ = 0.)
at the end nodes		(GROUP_NO = “AB”, DX = 0.)

Node names:

Point \(A\) = \(\mathrm{N1}\)	\({P}_{1}=\mathrm{N2}\)
Point \(B\) = \(\mathrm{N10}\)	\({P}_{2}=\mathrm{N3}\)
	…
	\({P}_{8}=\mathrm{N9}\)

3.2. Characteristics of the mesh

Number of knots: 10

Number of meshes and types: 9 SEG2

3.3. Tested sizes and results

Identification	Reference POUX	Tolerance	Reference
Non-regression »	Tolerance
Natural frequencies
1	5.53	0.001	0.001	5.525	0.001
2	10.89	0.001	0.001	10.887	0.001
3	15.92	0.001	0.001	15.924	0.001
4	20.46	0.001	20.461	0.001
5	24.38	0.001	0.001	24.390	0.001
6	27.57	0.001	27.566	0.001
7	29.91	0.001	29.911	0.001
8	31.35	0.001	0.001	31.347	0.001
Location size
ACCE_ABSOLU \(A\) \(\mathrm{DX}\)	1.0	0.15	1.136	0.001
\(\mathrm{P1}\) \(\mathrm{DX}\)	10.45	0.001	0.001	10.450	0.001
\(\mathrm{P2}\) \(\mathrm{DX}\)	19.03	0.001	19.030	0.001
\(\mathrm{P3}\) \(\mathrm{DX}\)	25.32	0.001	25.318	0.001
\(\mathrm{P4}\) \(\mathrm{DX}\)	28.95	0.001	28.946	0.001

3.4. notes

Fashion	1	2	3	3	3	4	5	6	7	8
Damping (in%)	0.868	0.868	1,710	1,710	2,500	3,213	3,830	4.331	4.698	4.698	4.698	4.924
Spectrum	23.19	19.54	19.54	9.033	9.033	3.928	2.282	1.601	1.283	1.136