4. C modeling#

4.1. Characteristics of modeling#

Same as modeling A

4.2. Loads#

The plate is subjected to a static loading of pressure that varies linearly as a function of time.

Instant

\(0.0\)

\(1.0\)

Pressure in Pa

\(0.0\)

\(10.0\)

Initially, no tension is imposed in the cable.

4.3. Test steps#

After defining the model, the materials and the loads, the macro command DEFI_CABLE_BP is used to obtain the kinematic relationships between the plate and the cable.

A static calculation is made with the pressure load using the operator STAT_NON_LINE in order to build an initial state.

The result from the operator STAT_NON_LINE is then given as the initial state to CALC_EUROPLEXUS. Only trips are transmitted to Europlexus (CONTRAINTE =” NON “). No additional load is given, the aim being to verify that the constraints calculated by Europlexus are the same as those calculated by Code_Aster.

Note: To find the same constraints, the static calculation in Code_Aster must imperatively be done in large movements because this is the kinematics used by Europlexus. In addition, operand NITER must be given the number of steps taken by Code_Aster to reach its final state during the static calculation.

CALC_EUROPLEXUS is called 3 times:

  • CONTRAINTE =” NON “and EQUILIBRE =” OUI “:

At the initial instant and at the final instant, it is verified that the constraints found are equal to those calculated by Code_Aster. As the balance has been forced there should be no step differences between the initial state and the final state.

  • CONTRAINTE =” NON “and EQUILIBRE =” OUI “:

This time we don’t give the static calculation load to CALC_EUROPLEXUS. This should not change the results from the previous case. The only difference is that the fictional external forces added by Europlexus to be in balance will be greater. We check at the initial moment and at the final moment that the constraints found are equal to those calculated by Code_Aster.

  • CONTRAINTE =” NON “and EQUILIBRE =” NON “:

At the initial instant, it is verified that the constraints found are equal to those calculated by Code_Aster. Since the balance is not forced, we can observe slight changes in displacement and constraints between the initial state and the final state.

4.4. Tested values#

Results from STAT_NON_LINE:

Mesh

Point

Instant

Instant

Component

Reference Value

Tolerance

QD001001

4

1.00E+000

\(\mathit{QX}\)

\(1.24999999663E+01\)

\(1E-6\)

TR001001

1

1.00E+000

\(\mathit{MXX}\)

\(-0.416666620634\)

\(1E-6\)

SG001001

1

1.00E+000

\(N\)

\(8.32299514012E-05\)

\(1E-6\)

Results from calculation CALC_EUROPLEXUS n° 1 and n° 2:

Initial moment and final moment:

Mesh

Point

Component

Reference Value

Tolerance

QD001001

4

\(\mathit{QX}\)

\(1.24999999663E+01\)

\(1E-6\)

TR001001

1

\(\mathit{MXX}\)

\(-0.416666620634\)

\(2E-6\)

SG001001

1

\(N\)

\(8.32299513977E-05\)

\(1E-6\)

Results from calculation CALC_EUROPLEXUS n° 3:

Initial moment:

Mesh

Point

Component

Reference Value

Tolerance

QD001001

4

\(\mathit{QX}\)

\(1.24999999663E+01\)

\(1E-6\)

TR001001

1

\(\mathit{MXX}\)

\(\mathrm{-}0.416666620634\)

\(2E-6\)

SG001001

1

\(N\)

\(8.32299513977E-05\)

\(1E-6\)

Final moment:

Mesh

Point

Component

Component

Reference Value

Tolerance

CRITERE

QD001001

4

\(\mathit{QX}\)

\(12.5000127517\)

\(5E-6\)

“RELATIF”

TR001001

1

\(\mathit{MXX}\)

\(-0.416668864726\)

\(5E-5\)

“RELATIF”

SG001001

1

\(N\)

\(7.58009308692E-05\)

\(1E-5\)

“ABSOLU”