3. Modeling A#

3.1. Characteristics of modeling#

Shell elements DKT

_images/1000124E000016F2000010BEFF10378F74A00BB6.svg

Cutting:

Top and bottom plates

10 in length 8 in width

==> 160 stitches TRIA3

Vertical plates

10 in length 1 in width

==> 20 stitches TRIA3

Node names:

Bottom plate:

N101,…, N109 N11,…, N119 … N201,…, N209

Top plate:

N401,…, N409 N41,…, N419 … N501,…, N509

Vertical plates:

N102, N102, N112,…, N202 N402, N412,…, N502 N108, N118,…, N208 N408, N418,…, N508

3.2. Characteristics of the mesh#

Number of knots:

198

Number of meshes and types:

360 TRIA3

3.3. Tested sizes and results#

Clean mode order

Experimental reference

Experimental reference

% difference/finite element model

% difference/finite element model

7

  1. ± 1%

590.0310

1.03

8

  1. ± 1.5%

829.4009

0.41

9

  1. ± 1.7%

848.1548

—0.80

10

  1. ± 2%

908.8566

—0.23

11

  1. ± 3.6%

1097.6578

—1.38

12

  1. ± 4%

1164.0088

2.46

*average of 5 calculation codes

3.4. notes#

Calculations made by:

CALC_MODES

OPTION = “BANDE”, CALC_FREQ =_F (FREQ = (1.,1200.)), SOLVEUR_MODAL =_F (METHODE = “TRI_DIAG”, DIM_SOUS_ESPACE = 12)

3.5. Contents of the results file#

The first 6 non-zero natural frequencies (eigenvectors and modal parameters).