D modeling
==============


Characteristics of modeling
-----------------------------------

The D modeling uses a behavior model for the linear dam, the calculation being carried out from the operator DYNA_VIBRA on a physical and temporal basis, with an undamped Newmark temporal integration scheme (:math:`\mathrm{\beta }=\mathrm{0,25}` and :math:`\mathrm{\gamma }=\mathrm{0,5}`) and a modal damping reduced by 0.01%.

For modeling D, we use the definition of the circle from the keywords RAYON, CENTRE_X and CENTRE_Y with the same parameters as modeling A.

We test the verification of the mass estimate using the keyword VERI_MASSE.


Tested sizes and results
------------------------------

The value of the irreversible displacement is tested at various times estimated by the Newmark method.

The reference results are obtained for a mesh that is 2x more refined than the original mesh. Mass verification makes it possible to approach the response of the 2x more refined mesh with a lower tolerance.


.. csv-table:: Déplacement irréversible sans vérification de la masse

    "**Identification**", "**Reference type**", "**Reference value**", "**Tolerance**"
    "t=0.6 s", "'AUTRE_ASTER'", "0.0003975788956828917"," 10%"
    "t=0.9 s", "'AUTRE_ASTER'", "0.00045246040472316054"," 10%"



.. csv-table:: Déplacement irréversible avec vérification de la masse

    "**Identification**", "**Reference type**", "**Reference value**", "**Tolerance**"
    "t=0.6 s", "'AUTRE_ASTER'", "0.0003975788956828917"," 5%"
    "t=0.9 s", "'AUTRE_ASTER'", "0.00045246040472316054"," 5%"