3. Modeling A#

3.1. Characteristics of modeling#

Modeling with elements of BARRE and CABLE.

3.2. Characteristics of the mesh#

The mesh contains:

  • 2 elements of type BARRE.

  • 60 elements of type CABLE. (15 elements per cable).

3.3. Tested sizes and results#

The value of the 1st natural vibration frequency of the cables is tested. As the 4 cables have the same voltage, there are therefore multiple vibration modes. Six multiple modes are tested, for each step.

No

Reference Type

Mode

Reference Value

Tolerance

10

“ANALYTIQUE”

Same value for the first 6 multiple modes

\(62.732270963\mathit{Hz}\)

\(0.5\text{\%}\)

“NON_REGRESSION”

1

\(62.7962\mathit{Hz}\)

default

“NON_REGRESSION”

2

\(62.9083\mathit{Hz}\)

default

“NON_REGRESSION”

3

\(62.9458\mathit{Hz}\)

default

“NON_REGRESSION”

4

\(62.9626\mathit{Hz}\)

default

“NON_REGRESSION”

5

\(62.9626\mathit{Hz}\)

defect

“NON_REGRESSION”

6

\(62.9626\mathit{Hz}\)

defect

20

“ANALYTIQUE”

Same value for the first 6 multiple modes

\(88.728308982\mathit{Hz}\)

\(0.5\text{\%}\)

“NON_REGRESSION”

1

\(88.5701\mathit{Hz}\)

default

“NON_REGRESSION”

2

\(88.8995\mathit{Hz}\)

default

“NON_REGRESSION”

3

\(89.0065\mathit{Hz}\)

default

“NON_REGRESSION”

4

\(89.0541\mathit{Hz}\)

default

“NON_REGRESSION”

5

\(89.0541\mathit{Hz}\)

defect

“NON_REGRESSION”

6

\(89.0541\mathit{Hz}\)

defect

3.4. notes#

The calculation is carried out with the operator STAT_NON_LINE, then the operators CALC_MATR_ELEM, ASSE_MATRICE and COMB_MATR_ASSE for assembling the matrices. The calculation of the frequencies and modes of vibration is carried out with the operator CALC_MODES.