Modeling A
==============


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

The elements are modeled by discrete elements with 6 degrees of freedom DIS_TR.


.. image:: images/10000A3C0000174100000A709E2D0794D298FCA8.svg
    :width: 300
    :height: 134


.. _RefImage_10000A3C0000174100000A709E2D0794D298FCA8.svg:

The node :math:`\mathrm{NO1}` is subject to an imposed acceleration :math:`\gamma (t)`. The relative displacement of node :math:`\mathrm{NO2}` with respect to the displacement of node :math:`\mathrm{NO1}` is calculated and compared to the displacement calculated analytically.

The time integration is carried out with the Euler algorithm (time step: :math:`5.{10}^{-4}s`).


Characteristics of the mesh
----------------------------

The mesh consists of 2 nodes and a discrete element (DIS_TR).


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

Relative displacement of node NO1 (in meters).


.. csv-table::

    "**Time (s)**", "**Analytical calculation**", "**Code_Aster**", "**Error (%)**"
    "0.010", "—6,511E—05", "—6,495E—05", "0"
    "0.015", "—2,185E—04", "—2,183E—04", "0"
    "0.020", "—5,139E—04", "—5,136E—04", "—0.058"
    "0.024", "—8,809E—04", "—8,806E—04", "—0.039"
    "0.026", "—1.115E—03", "—1.115E—03", "—0.041", "—0.041"
    "0.030", "—1.679E—03", "—1.679E—03", "—0.014"
    "0.035", "—2.523E—03", "—2.523E—03", "—0.004"
    "0.040", "—3,457E—03", "—3,457E—03", "0"
    "0.045", "—4.412E—03", "—4.412E—03", "0.004"
    "0.049", "—5,143E—03", "—5,143E—03", "0.005"
    "0.051", "—5,485E—03", "—5,485E—03", "0.005"
    "0.055", "—6,109E—03", "—6,109E—03", "0.005"
    "0.060", "—6,765E—03", "—6,765E—03", "0.005"
    "0.065", "—7,269E—03", "—7,269E—03", "0.005"
    "0.070", "—7,610E—03", "—7,610E—03", "0.005"
    "0.075", "—7,779E—03", "—7,780E—03", "0.005"
    "0.080", "—7.774E—03", "—7.775E—03", "0.004"
    "0.085", "—7,595E—03", "—7,595E—03", "0.004"