3. Modeling A#

3.1. Characteristics of modeling#

Volume elements MECA_HEXA20

_images/10000000000001B0000001923C406F430C9AFAD4.png

Discretization:

AB beam: 30 meshes HEXA20 (1 stitch in the section)

Boundary conditions:

  • in all knots

  • at the \(A\) end (node group G_1)

DDL_IMPO: (TOUT :” OUI “DZ: 0.) (GROUP_NO: G_1 DX: 0., DY: 0)

3.2. Characteristics of the mesh#

Mesh:

Number of nodes: 368 Number of meshes and type: 30 HEXA20

3.3. Tested values#

Identification

Solution for analytic

Reference SAMCEF

Aster

% difference

% difference

Aster- SAMCEF »

frequency

in HZ

in HZ

coherent matrix

flex 1

54.18

56.84

56.84

56.85

0.0176%

flex 2

171.94

180.0

180.0

180.08

0.0444%

flex 3

384.40

401.0

401.0

401.23

0.0574%

flexure 4

697.24

723.2

724.02

0.1134%

flexure 5

1112.28

1145.41

1147.51

0.1833%

diagonal matrix

flexure 1

54.18

56.84

56.84

56.78

— 0.1033%

flexure 2

171.94

180.00

180.00

179.57

— 0.2419%

flex 3

384.40

401.00

401.00

399.24

— 0.4408%

flex 4

697.24

723.20

723.20

718.69

— 0.6273%

flexure 5

1112.28

1145.41

1145.41

1136.01

— 0.8273%