3. Modeling A#

3.1. Characteristics of modeling#

DKT

_images/10000BBE000024E600001177FCC2F499381B9061.svg

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

Boundary conditions:

in all the knots on side \(\mathrm{AB}\):

DDL_IMPO: (GROUP_NO: AB DX:0. , DY:0. , DZ: 0. , DRX: 0. , DRY: 0. , DRZ: 0.)

Node name:

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

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

Bridge \(B\) = \(\mathrm{N11}\)

Point \(D\) = \(\mathrm{N111}\)

3.2. Characteristics of the mesh#

Number of nodes:

121

Number of meshes and types:

200 TRIA3

3.3. Tested sizes and results#

Mode Order

Frequency

( \(\mathrm{Hz}\) )

clean i

Reference (Barton)

Reference (average of 5 codes)

Aster

% difference/ average codes

1

9.8987

9.7355

9.8402

1.08

2

25.4651

23.2745

23.2745

23.5790

1.31

3.4. notes#

Calculations made by:

CALC_FREQ =_F (NMAX_FREQ = 2) SOLVEUR_MODAL =_F (METHODE = “TRI_DIAG”)

3.5. Contents of the results file#

2 first natural frequencies, eigenvectors and modal parameters.