3. Modeling A#

3.1. Characteristics of modeling#

Fine mesh for validation of the reference solution

_images/10000DFA000016F20000175CC10AEA6245CC2EE0.svg

Die-cutting:

10 on each side of the diamond, i.e. 200 TRIA3 stitches.

Elaboration of element \(\frac{a}{10t}=20\).

Boundary conditions:

in all \(P\) nodes on the \(\mathrm{Xp}=0.\) side:

DDL_IMPO: (GROUP_NO: COTE DX:0., DY:0., DZ: 0., DRY: 0.)

Node name:

Point \(1\) = \(\mathrm{N1}\)

Point \(\mathrm{121 }\) = \(\mathrm{N121}\)

3.2. Characteristics of the mesh#

Number of nodes:

121

Number of meshes and types:

200 TRIA3

3.3. Tested sizes and results#

Clean mode order

Reference Frequency (Hz)

Aster Frequency (Hz)

% difference

1

0.421

0.4178

—0.8

2

1.029

1.0255

—0.3

3

2.582

2.5669

—0.6

4

3.306

3.2733

—1.

5

3.753

3.7347

—0.5

6

6.555

6.5236

—0.5

7

7.3756

8

7.7332

9

8.5567

10

11.1199

11

11.6474

12

14.3551

3.4. notes#

Calculations made by:

OPTION = “PLUS_PETITE” CALC_FREQ =_F (NMAX_FREQ = 12) SOLVEUR_MODAL =_F (METHODE = “TRI_DIAG”)

3.5. Contents of the results file#

12 first natural frequencies, eigenvectors and modal parameters.